Cardiovascular Flashcards

1
Q

What is Cardiac Failure?

A

The failure of the heart to maintain the cardiac output required to meet the body’s demands

LHF + RHF = Congestive Heart Failure

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2
Q

What does it mean by ‘Output States’ in relation to Cardiac Failure?

A

Low Output State = heart fails to pump in response to normal exertion

High Output State = cardiac output is normal but there are higher metabolic needs such as pregnancy, anaemia, hyperthyroidism

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3
Q

What are the ways in which Cardiac Failure can be classified?

A
  • By EF
  • By time
  • By LHF or RHF
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4
Q

What are the parameters for classifying Cardiac Failure by EF?

A
  • Patients with reduced LVEF (< 35-40%) have HF-rEF
    This is due to systolic dysfunction (impaired myocardial contraction)
  • Patients with normal (preserved) LVEF have HF-pEF
    This is due to diastolic dysfunction (impaired filling during diastole)

LVEF measured using echocardiography

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5
Q

Causes of Systolic and Diastolic dysfunction for Heart Failure

A

SD
- Ischaemic Heart Disease
- Dilated CMO
- Myocarditis
- Arrhythmias

DD
- Hypertrophic Obstructive CMO
- Restrictive CMO
- Cardiac Tamponade
- Constrictive Pericarditis

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6
Q

What are the parameters for classifying Cardiac Failure by time?

A

Acute or Chronic

  • Acute typically refers to an acute exacerbation of chronic
  • Most urgent symptoms are often due to LV failure resulting in pulmonary oedema
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7
Q

What are the parameters for classifying Cardiac Failure by LHF and RHF?

A

HF-rEF and HF-pEF typically develop left-sided heart failure. This may be due to increased left ventricular afterload (e.g. arterial hypertension or aortic stenosis) or increased left ventricular preload (e.g. aortic regurgitation resulting in backflow to the left ventricle).

Right-sided heart failure is caused by either increased right ventricular afterload (e.g. pulmonary hypertension) or increased right ventricular preload (e.g. tricuspid regurgitation).

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8
Q

History and Examination for LHF

A

Respiratory symptoms

  • Increased heart and respiratory rate
  • Arrhythmia
  • Dyspnoea
  • Nocturnal cough (may have pink frothy sputum)
  • Fatigue
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9
Q

History and Examination of RHF

A

Swelling symptoms

  • Swelling
  • Fatigue
  • Raised JVP
  • Reduced exercise tolerance
  • Anorexia
  • Nausea
  • Nocturia
  • Ascites
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10
Q

Clinical Diagnosis for Cardiac Failure by Framingham Criteria

A

2+ majors or 1 major and 2 minors from:

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11
Q

Investigations for Cardiac Failure

A

CHRONIC
-NT-proBNP (nice)
- 2000ng/litre, urgent referral for transthoracic echo in 2/52
- 400-2000ng/litre, same as above but in 6/52

ACUTE
- BNP > 100ng/litre
- NT-proBNP > 300ng/litre
- Perform transthoracic Doppler 2D echocardiography to establish the presence or absence of cardiac abnormalities

  • ECG
  • Bloods - FBCs, U&Es, LFTs, TFTs, BNP
  • Chest X-Ray
  • Transthoracic Echocardiography
  • Coupled with Doppler
  • Can calculate EF (normal 50-70%)
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12
Q

Findings for Cardiac Failure on X-Ray

A
  • Alveolar Oedema
  • Cardiomegaly
  • B-lines (Kerley)
  • Dilated upper lobe vessels and upper lobe
  • Effusion
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13
Q

Management of Cardiac Failure if Acute

A

ABCDE approach

  • Sit patient upright
  • Give oxygen (target 94-98%)
  • GTN infusion if concomitant myocardial ischaemia, severe hypertension or left-sided regurgitation
    • Can cause hypotension
  • IV furosemide for pulmonary oedema
  • CPAP if not responding to treatment and in respiratory failure.
  • Inotropic agents such as dobutamine should be considered with severe left ventricular dysfunction and cardiogenic shock (hypotensive).
  • Stop beta-blockers if HR < 50, second or third degree heart block, or shock
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14
Q

Management of Cardiac Failure if Chronic

A
  • Treat underlying cause
  • Treat exacerbating factors
  • Lifestyle modifications
  • Drugs
    • ACE inhibitor - give to all patients with LV dysfunction (reduced EF) and beta-blocker - reduce O2 demand on heart
    Second line:
    • Aldosterone agonist
      • Spironolactone, eplerenone
      • Monitor potassium to avoid hyperkalaemia
    • SGLT-2 inhibitors for reduced ejection fraction
    Third-line (specialist):
    • Ivabradine if sinus rhythm > 75/min and EF < 35%
    • Sacubitril-valsartan if EF < 35% and symptomatic on ACEi’s or ARBs (initiate after wash-out period)
    • Digoxin if coexistent atrial fibrillation
    • Consider hydralazine and nitrates in Afro-Caribbean patients
    • Cardiac resynchronisation therapy if widened QRS
  • Annual influenza vaccine
  • One-off pneumococcal vaccine
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15
Q

What are complications of Cardiac Failure?

A
  • Respiratory complications
  • Renal failure
  • Acute exacerbations
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16
Q

What is Deep Vein Thrombosis?

A

Deep vein thrombosis (DVT) is a significant medical condition characterised by the formation of a thrombus within the deep venous system, typically in the lower extremities.

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17
Q

What do patients with DVT usually present with?

A
  • Pain + tenderness + swelling in affected leg
  • Warmth + redness in affected leg
  • Shortness of breath and chest pain (suggestive of PE)
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18
Q

What scoring system is carried out for suspected DVT?

A

Well’s Score

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19
Q

Investigations for DVT

A

If scores from Well’s Score:

  • Is >2 : Ultrasound of affected leg, D-dimer if negative
  • Is <2 OR US can’t be carried out in 4 hours : D-dimer, give DOAC in meantime
    • If +ve D-dimer, stop DOAC and do US in a week
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20
Q

Management for DVT

A

The management of DVT involves the following steps:

  • Apixaban or rivaroxaban
    • If unsuitable, severe renal impairment or antiphospholipid syndrome then low molecular weight heparin followed by vitamin K antagonist (warfarin)
    • 3 months for provoked VTE
    • 6 months for unprovoked VTE
  • Compression stockings: These help to prevent swelling and improve blood flow in the affected leg.
  • Elevation of the affected leg: This helps to reduce swelling and improve blood flow.
  • Thrombectomy: This is a surgical procedure to remove the blood clot in the affected vein
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21
Q

What are risk factors for DVT?

A
  • Age
  • Smoking
  • Alcohol
  • Recent surgery
  • Medication
  • Trauma
  • Malignancy
  • Obesity
  • Being inactive
  • Diabetes
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22
Q

What is the NICE definition of Hypertension?

A
  • A clinic reading persistently above 140/90 mmHg
  • A 24 hour BP average reading of 135/85 mmHg
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23
Q

What are the two types of Hypertension?

A

Primary - no single disease causing the rise in BP, complex series of physiological changes

Secondary - precipitates from a particular disease

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24
Q

Renal causes of Hypertension

A
  • Glomerulonephritis
  • Chronic pyelonephritis
  • Adult polycystic kidney disease
  • Renal artery stenosis
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25
Q

Endocrine causes of Hypertension

A
  • Primary hyperaldosteronism
  • Phaeochromocytoma
  • Cushing’s
  • Liddle’s
  • CAH
  • Acromegaly
  • Thyroid problems
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26
Q

H&E of Hypertension

A

Usually asymptomatic unless very high BP
Patients may experience
- Headaches
- Visual disturbance
- Seizures
Ensure there is no end-organ damage

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27
Q

What is very important to assess when a patient has newly diagnosed hypertension?

A

End organ damage
- Fundoscopy to check for hypertensive retinopathy
- Urine dipstick to check for renal disease (cause or consequence
- ECG to check for LV hypertrophy or IHD

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28
Q

Investigations for hypertension

A

24 hour BP monitoring
ABPM or HBPM

U&E - renal disease
HbA1c - DM
Lipids - Hyperlipidaemia
ECG
Urine dipstick

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29
Q

Management of hypertension

A

STEP 1
<55 or T2DM = ACEi or ARBs
>55 / Afro-caribbean + No T2DM = CCBs

STEP 2
A+C or A+D

STEP 3
A+C+D

STEP 4
If K+ < 4.5 add low-dose spirinolactone

If K+ > 4.5 add alpha or beta blocker

If still not controlled have specialist review

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30
Q

What is Unstable Angina?

A

Chest pain, considered to be present in patients with ischaemic symptoms suggestive of ACS + no elevation in troponins, +/- ECG changes indicative of ishcaemia

Troponins may elevate some hours later, treated same as NSTEMI until Troponin result known

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31
Q

H&E of Unstable Angina

A
  • Chest pain
  • May radiate to jaw or left arm
  • Often described as ‘heavy’ or ‘crushing’
  • Not relieved by rest
  • Certain patients e.g. diabetics or elderly may not experience pain

Other symptoms of ACS:
- Dyspnoea
- Sweating
- N+V

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32
Q

Investigations for Unstable Angina

A
  • ECG
  • Cardiac markers e.g. troponin
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33
Q

Simplified management of NSTEMI/Unstable Angina

A
  1. Aspirin 300mg, Fondaparinux if no immediate PCI planned
  2. Estimate 6 month mortality with GRACE
  3. Low risk - Conservative - Ticagrelor
    OR
    Intermediate or high risk - PCI - offer immediately if unstable otherwise in 72hrs
    Give prasugrel or ticagrelor, give unfractionated heparin, drug-eluting stents used in preference
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34
Q

Further treatment of NSTEMI/Unstable Angina

A

MONA
- morphine for severe pain
- oxygen if <94%
- nitrates
- aspirin 300mg

Antithrombin treatment for patients at high risk of bleeding

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35
Q

GRACE Risk Assessment

A

Takes into account:
- age
-HR, BP
- Cardiac (Killip class) and renal function (serum Cr)
- Cardiac arrest on presentation
- ECG
- Troponin levels

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36
Q

What is Pulmonary Embolism?

A

Life-threatening condition resulting from dislodged thrombi occluding the pulmonary vasculature; RHF and cardiac arrest may ensue if not aggressively treated

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37
Q

RF for PE?

A
  • Age
  • DVT
  • Recent surgery
  • Long bed rest
  • Previous thromboembolic event
  • Malignancy
  • Trauma
  • COCP
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38
Q

H&E of PE

A
  • Pleuritic chest pain
  • Dyspnoea
  • Haemoptysis
  • Collapse if severe
  • Tachycardia
  • Tachypnoea
  • Fever
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39
Q

PE rule-out criteria (PERC)

A

Used to exclude PE in patients known to have a low pre-test probability (<15%)

Age >= 50
HR >= 100
O2 Sats <= 94%
Previous DVT or PE
Recent surgery or trauma in last 4 weeks
Haemoptysis
Unilateral leg swelling
Oestrogen use (e.g. HRT, contraceptives)

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40
Q

2-Level PE Wells score

A

Clinical signs and symptoms of DVT - 3

Alternative diagnosis less like than PE - 3

HR > 100 - 1.5

Immobilisation for more than 3 days or surgery in the previous 4 weeks - 1.5

Previous DVT/PE - 1.5

Haemoptysis - 1

Malignancy - 1

PE LIKELY - MORE THAN 4 POINTS

PE UNLIKELY - 0-4 POINTS

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41
Q

Investigations for PE

A

If PE likely:
- CTPA : if +, PE diagnosed / if -, consider proximal leg vein ultrasound

  • Interim therapeutic anticoagulation - DOAC

If PE unlikely:
- D-dimer test : if + = CTPA, if - = stop anticoagulation

  • V/Q scan instead of CTPA if renal impairment
  • Arterial blood gas
  • ECG sinus tachycardia, may also see RBBB, right axis deviation, S1Q3T3
  • CXR - Westermark’s sign : wedge shaped opacification
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42
Q

Management of PE is haemodynamically unstable (SBP<90)

A
  • Thrombolysis (alteplase)
  • Respiratory support
  • Unfractionated heparin
  • Then switch to DOAC
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43
Q

Management of PE if haemodynamically stable

A
  • DOAC
    • if severe renal impairment or antiphospholipid syndrome, give LMWH and warfarin

Give treatment for 3 months if VTE was provoked, 6 months if unprovoked

If repeat PE despite treatment consider inferior vena cava filters

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44
Q

VTE prevention for PE

A

Everyone must be VTE risk assessed within 24 hours of hospital admission

  • Compression stockings
  • Low molecular weight heparin (tinzaparin)
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45
Q

What is Pericardial Disease?

A

Refers to any condition that affects the pericardium, the sac-like membrane that surrounds the heart.

Can cause inflammation, fluid accumulation or constriction of the pericardium.

Acute is lasting for less than 4-6 weeks

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46
Q

Aetiology of Pericardial Disease

A
  • Viral infections (Coxsackie)
  • TB
  • Uraemia
  • Post-MI
    • early (1-3 days) : fibrinous pericarditis
    • late (weeks to months) : autoimmune (Dressler’s syndrome)
  • Radiotherapy
  • Connective tissue disease
    • SLE
    • RA
  • Hypothyroidism
  • Malignancy (lung/breast)
  • Trauma
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47
Q

H&E of Pericardial Disease

A

History :

  • Pleuritic chest pain
    • Relieved by sitting forwards
  • SOB
  • Non-productive cough
  • Fever
  • Fatigue
  • Palpitations

Exam :

  • Muffled Heart sounds
  • Pericardial rub
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48
Q

H&E of Constrictive Pericarditis

A
  • RHF symptoms
    • Elevated JVP
    • Ascites
    • Oedema
    • Hepatomegaly
  • Pericardial knock : Loud S3
  • Positive Kussmaul’s sign : paradoxical rise in JVP on inspiration
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49
Q

Investigations for Pericardial Disease

A
  • First-line is ECG
    • PR depression
    • Saddle-shaped ST elevation
  • All patients with suspected acute pericarditis should have a transthoracic echo
  • Bloods : CRP and ESR
    • Raised troponin indicates myopericarditis
  • CXR for constrictive pericarditis
    • Pericardial calcification
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50
Q

Management of Pericardial Disease

A
  • Combination of NSAIDs and Colchicine for patients with acute idiopathic or viral
    • Until symptom resolution and normalisation of inflammatory markers, taper doses
  • High-risk features e.g. fever and raised troponin, treated as inpatient
  • Treat any underlying cause
  • Avoid strenuous physical activity
  • If pericardial effusion is causing significant symptoms of haemodynamic compromise, pericardiocentesis may be necessary
  • If cases of chronic or constrictive pericarditis, surgical interventions such as pericardiectomy or pericardial window may be required
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51
Q

What is Haemochromatosis?

A
  • Autosomal recessive disorder of iron absorption and metabolism resulting in iron accumulation
  • Caused by inheritance of mutations in the HFE gene on both copies of chromosome 6*
  • Often asymptomatic in early disease and initial symptoms often non-specific e.g. lethargy and arthralgia
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52
Q

H&E of Haemochromatosis

A

Early symptoms include fatigue, ED and arthralgia (often hands)

Reversible symptoms:
- ‘bronze’ skin pigmentation

  • cardiac failure secondary to dilated CMO

Irreversible symptoms:
- DM

  • Liver : stigmata of CLD, hepatomegaly, cirrhosis, hepatocellular deposition
  • Hypogonadism (2nd to cirrhosis and pituitary dysfunction)
  • Arthritis
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53
Q

Screening of Haemochromatosis

A

Screening:

Gen. Pop.
- Transferrin saturation is considered the most useful marker
- Ferritin should also be measured but is not usually abnormal in the early stages of iron accumulation

Family members:
- Genetic testing for HFE mutation

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54
Q

Investigations for Haemochromatosis

A

Typical iron study profile in patient with haemochromatosis

  • Transferrin saturation > 55% in men or >50% in women
  • Ferritin raised and iron
  • Low TIBC

Also:

  • LFTs
  • Molecular genetic testing for C282Y and H63D mutations
  • MRI to quantify liver and cardiac iron
  • Liver biopsy if suspected cirrhosis
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55
Q

Management of Haemochromatosis

A
  • Venesection
    • Transferrin saturation should be kept below 50% and serum Ferritin concentration below 50 ug/L
  • Desferrioxamine may be used second line
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56
Q

What are Acute Coronary Syndromes?

A

Umbrella term covering a number of acute presentations of IHD

  • STEMI
  • NSTEMI
  • Unstable Angina (present in patients suggestive of ACS w/o elevation of troponins +/- ECG changes)
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57
Q

What is Ischaemic/Coronary Heart/Artery disease?

A

Gradually build up of fatty plaques leading to:

  • Gradual narrowing, resulting in blood loss and therefore oxygen loss reaching the myocardium - leads to angina
  • Risk of sudden plaque rupture - leads to occlusion of artery
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58
Q

RF of ACS

A

Unmodifiable: age, gender (M>F), FHx

Modifiable: smoking, DM, HT, high cholesterol, obesity

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59
Q

H&E of ACS

A

Key:
- Chest pain (central/LHS, crushing/heavy, radiates to jaw or LA)
- Dyspnoea
- Sweating
- N+V

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60
Q

Investigations for ACS

A

1st:
- ECG
- Cardiac markers e.g. Troponin
- Bloods

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61
Q

ECG lead changes in ACS

A

Anterior/Septal = V1-V4 = Left anterior descending

Inferior = II, III, aVF = Right coronary

Lateral = I, V5-V6 = Left circumflex

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62
Q

General Management of ACS

A

MONA

  • Morphine (for severe pain)
  • Oxygen (if <94%)
  • Nitrates (caution if hypotensive)
  • Aspirin 300mg
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63
Q

Management of STEMI is PCI possible

A
  • Aspirin 300mg
  • PCI within 120mins
  • give prasugrel
  • unfrac. heparin
  • bailout glycoprotein IIb/IIIa inhibitor
  • drug elluting stents should be used in preference

ASSUMING
- Patient presents within 12 hours of symptoms
- Patient is not a high bleeding risk
- Patient is not on DOAC

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64
Q

Management of STEMI if PCI not possible

A
  • Aspirin 300mg
  • Fibrinolysis
  • Give antithrombin at the same time
  • Following procedure give Ticagrelor
  • Conduct ECG 60-90 mins after fibrinolysis - if persisting consider PCI

ASSUMING
- Patient presents within 12 hours of symptom
- Patient is not high bleeding risk
- Patient is not on DOAC

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65
Q

Management of NSTEMI/ Unstable Angina if LOW RISK

A
  • Aspirin 300mg + Fondaparinux if PCI not immediate
  • GRACE risk </3% = low risk
  • Give Ticagrelor
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66
Q

Management of NSTEMI/ Unstable Angina if HIGH RISK

A
  • Aspirin 300mg + Fondaparinux if PCI not immediate
  • GRACE risk >/3% = high risk
  • PCI if clinically unstable, otherwise within 72 hours
  • Give prasugrel/ticagrelor
  • Unfractionated heparin
  • Drug eluting stents used in preference
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67
Q

Assumptions made in treatment of ACS + alternatives

A

Patient is high bleed risk:
- STEMI : switch prasugrel to ticagrelor/ ticagrelor to clopidogrel
- NSTEMI/UA : fondaparinux for alternative antithrombin/dose

Patient is on DOAC :
- STEMI : swap prasugrel for clopidogrel
- NSTEMI/UA : swap ticagrelor/prasugrel for clopidogrel or switch prasugrel to ticagrelor/ ticagrelor to clopidogrel

Patient presents after 12 hours = PCI immediately if ongoing MI

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68
Q

After event management of ACS

A

Lifelong:

  • Aspirin
  • Second antiplatelet (clopidogrel)
  • Beta-blocker
  • ACEi
  • Statin
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69
Q

What are beta-blockers and what are they used for?

A

B1 antagonists

Used for IHD, CHF, AF, SVT, resistant hypertension, migraine prophylaxis and thyrotoxicosis

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70
Q

Contraindications and adverse effects of beta-blockers

A

Contraindications in asthma (can cause bronchospasm), heart block and severe hypotension

Effects :
- Fatigue, cold extremities, headaches, GI upset, sleep disturbance + nightmares, erectile dysfunction

In HF, start with low dose and gradually increase

Reduce dose in significant liver failure

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71
Q

Adverse effects of Statins

A

Common side effects:
- muscle pain, headache, digestive issues, and fatigue

More serious but rare side effects include:
- liver damage, kidney damage
- rhabdomyolysis (muscle breakdown)
- raised CK

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72
Q

Serious adverse effect of Gentamicin

A

It is nephrotoxic

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73
Q

What are ACEi + side effects?

A

Inhibit conversion of angiotensin I to angiotensin II

  • Cough
  • Angioedema
  • Hyperkalaemia
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74
Q

What are CCBs + side effects?

A

Block VG calcium channels, relaxing vascular smooth muscle and force of myocardial contraction

  • Flushing
  • Headaches
  • Ankle swelling
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75
Q

What are Thiazide diuretics + side effects?

A

Inhibit sodium absorption at beginning of DCT

  • Hyponatraemia
  • Hypokalaemia
  • Dehydration
76
Q

What are A2RBs + side effects?

A

Block effects of angiotensin II at AT1 receptor

  • Hyperkalaemia
77
Q

What is an Aortic Aneurysm?

A

Weakening of vessel wall of aorta specifically abdominal portion

  • Usually result of the failure of elastic proteins within ECM
  • Diameters >3cm are considered aneurysmal (M-1.7, F-1.5)
  • 90% occur below renal arteries
  • True aneurysms = all three layers expanding
78
Q

H&E of Unruptured AAA

A
  • Usually asymptomatic
  • Pulsing sensation in abdomen
  • May have abdominal/lower back pain
79
Q

H&E of Ruptured AAA

A
  • Severe, central abdominal pain radiating to back
  • Dizziness
  • Sweaty, pale and clammy skin
  • Tachycardia
  • Dyspnoea
  • Syncope
80
Q

RF of AAA

A
  • Smoking
  • FHx
  • HT
  • High cholesterol
  • Syphilis
  • CT disorder e.g. Ehlers Danlos T1, Marfan’s
81
Q

Investigations for AAA

A

Abdominal US to detect presence

CT angiogram to detect is ruptured (if stable)

Bloods - crossmatch in case of surgery

82
Q

Management of AAA

A

<3cm = no further action

3-4.4cm = small = rescan yearly

4.5-5.4cm = medium = rescan every 3 months

> / 5.5cm = large = refer within 2 weeks to vascular surgery for probable intervention (only 1 in 1000)

If large + symptomatic or rapidly enlarging - 2 week vascular surgery

If ruptured immediate vascular review and emergency endo vascular repair (open repair if unsuitable) - complication is endoleak

83
Q

What is an Aortic Dissection?

A

Tear in aortic intima that allows blood to flow into new false lumen in between inner and outer layers of tunica media

84
Q

Stanford classification of Aortic Dissection

A

Type A - ascending aorta, 2/3 cases

Type B - descending aorta, distal to left subclavian origin, 1/3 cases

85
Q

DeBakey classification of Aortic Dissection

A
  • Type I - originates in ascending aorta, propagates to at least the aortic arch and possibly beyond it distally
  • Type II - originates in and is confined to the ascending aorta
  • Type III - originates in descending aorta, rarely extends proximally but will extend distally
86
Q

H&E of Aortic Dissection

A
  • Acute severe chest pain (more common in type A and upper back pain is type B)
  • Deficit pulse
  • L/R BP difference
  • Aortic regurgitation
  • Features of Ehlers-Danlos/ Marfan’s
87
Q

Symptoms of Aortic Dissection due to blockage of branching arteries

A
  • Carotid = blackouts, dysphasia
  • Coronary = angina
  • Subclavian = loss of consciousness
  • Renal = anuria, renal failure
88
Q

RF of Aortic Dissection

A
  • HT
  • Trauma
  • Biscuspid aortic valve
  • CT disorders
  • Coarctation of aorta
89
Q

Investigations of Aortic Dissection

A
  • CT angiogram - false lumen
    (Trans oesophageal echo if unstable)
  • ECG (often normal)
  • CXR - widened mediastinum
  • Bloods + cardiac enzymes
90
Q

Management of Aortic Dissection

A
  • IV antihypertensives + beta-blocker
  • O2 + analgesia
  • Type A - surgery, control BP to 100-120 systolic
  • Type B - conservative management, IV labetalol to reduce BP

Surgery associated with significant risk of paraplegia

91
Q

What is Arterial Thrombosis?

A

Blood clot that forms in an artery

Can block flow of blood to affected area - causing damage or death to tissue

Occurs in antiphospholipid syndrome, Polycythaemia Vera, Hyperosmolar Hyperglycaemic state

92
Q

H&E of Arterial Thrombosis

A

Depend on location of the clot

Common symptoms include:
- Sudden pain in chest, arm or leg
- Dyspnoea
- Dizziness
- Numbness or tingling in face, arm or leg
- Vision problems
- Seizures

93
Q

Investigations of Arterial Thrombosis

A

Depends on location and severity

  • Duplex US
  • Angiography
  • CT scan
  • ECG
  • Bloods
94
Q

Management of Arterial Thrombosis

A

Depends on location and severity

May include:

  • Thrombolytic therapy
  • Anticoagulation therapy
  • Surgical intervention
95
Q

What are Venous Ulcers?

A

Complication of chronic venous insufficiency
- increasing leg pain
- fatigue
- heaviness with prolonged standing

Typically seen above medial malleolus

96
Q

H&E of Venous Ulcers

A
  • Large + shallow
  • Sloping, sides not well-defined
  • Gaiter region (between ankle and knee)

Symptoms of venous insufficiency
- swelling, itching, aching

97
Q

Investigations for Venous Ulcers

A
  • Duplex US of lower limbs
  • ABPI : <0.9 = arterial disease - impairs healing
  • Swab for microbiology
  • Biopsy
98
Q

Management of Venous Ulcers

A
  • Four layer compression bandaging
  • Debridement and cleaning
  • Measure SA to monitor progression
  • Oral pentoxifylline (peripheral vasodilator) to improve healing rate
  • Abx if infected
99
Q

What is Vasovagal Syncope?

A
  • Type of neurally mediated reflex syncope (NMRS)
  • MC cause of loss of consciousness in young people
  • Syncope is sudden, temporary and self-terminating loss of consciousness associated with inability to maintain postural tone with rapid and spontaneous recovery
100
Q

H&E of Vasovagal Syncope

A
  • Hx of recurrent faints
  • Absence of structural heart disease
  • Provocative factor
  • Nausea
  • Lightheadedness
  • Pallor
  • Diaphoresis
  • Bradycardia
101
Q

RF of Vasovagal Syncope

A
  • Prior syncope
  • Prior Hx of arrhythmias, MI, HF or CMO
  • Severe aortic stenosis
  • Prolonged standing, emotional stress, dehydration
102
Q

Investigations for Vasovagal Syncope

A
  • 12-lead ECG
  • Serum Hb
  • Plasma blood glucose
  • Serum beta-hCG
  • Cardiac enzymes
  • D-dimer levels
  • Serum cortisol
  • Urea or serum creatinine
103
Q

Management of Vasovagal Syncope

A
  • Patient education
  • Physical techniques
  • Volume expansion
104
Q

What is Myocarditis?

A

Describes inflammation of the myocardium
Wide range of underlying causes - should particularly be considered in young people with chest pain

105
Q

Causes of Myocarditis

A
  • Viral : coxsackie B, HIV
  • Bacteria : diphtheria, clostridia
  • Spirochaetes : Lyme disease
  • Protozoa : Chagas’, toxoplasmosis
  • Autoimmune
  • Drugs : doxorubicin
106
Q

H&E of Myocarditis

A
  • Usually young patient with acute Hx
  • Chest pain
  • Dyspnoea
  • Arrhythmias
107
Q

Investigations for Myocarditis

A

Bloods
- inc. inflammatory markers in 99%
- inc. cardiac markers
- inc. BNP

ECG
- tachycardia
- arrhythmias
- ST/T waves changes including ST-segment elevation and T wave inversion

108
Q

Management of Myocarditis

A
  • Treatment of underlying causes e.g. Abx if bacterial
  • Supportive treatment e.g. of heart failure or arrhythmias
109
Q

Complications of Myocarditis

A
  • HF
  • Arrhythmias
  • Dilated CMO : usually late complication
110
Q

Causes of Aortic Stenosis

A
  • Degenerative calcification (MC > 65 years)
  • Bicuspid aortic valve (MC < 65 years)
  • William’s syndrome (supravalvular aortic stenosis)
  • Post-rheumatic disease
  • Subvalvular : HOCM
111
Q

H&E of Aortic Stenosis

A
  • Chest pain
  • Dyspnoea
  • Syncope/presyncope
  • Murmur (Ejection systolic, radiates to carotids, decreased following Valsalva manoeuvre)

Features
- narrow pulse pressure
- slow rising pulse
- delayed ESM
- soft/absent S2
- S4
- thrill
- left ventricular hypertrophy or failure

112
Q

Investigation for Aortic Stenosis

A
  • Echocardiography to assess valve area, gradient, jet velocity
113
Q

Management of Aortic Stenosis

A

Asymptomatic : observe
Asymptomatic but valvular gradient >40mmHG + LV systolic dysfunction : consider surgery

Symptomatic : valve replacement

Options for replacement:
- Surgical AVR : young or low/medium risk
- TAVR : for high operative risk

Balloon valvuloplasty : in children with no calcification or adults not fit for surgery

114
Q

What is Aortic Regurgitation?

A

Leaking of the aortic valve of the heart that causes blood to flow in the reverse direction during ventricular diastole

Can be caused by disease of aortic valve or distortion or dilation of aortic root and ascending aorta

115
Q

Causes of Aortic Regurgitation

A

Chronic due to valve : rheumatic fever (MC in developing world), calcification, CT disorder, biscuspid AV (both valve and root)
Chronic due to root : bicuspid AV, HT, syphilis, CT disorder, spondylarthropathies

Acute due to valve : infective endocarditis
Acute due to root : aortic dissection

116
Q

H&E of Aortic Regurgitation

A

Mild can be asymptomatic but severe can cause:
- Fatigue
- Shortness of breath
- Chest pain
- Fainting
- Swelling of ankles and feet
- Heart palpitations

On exam:
- early diastolic murmur: intensity increased by handgrip manoeuvre
- collapsing pulse
- wide pulse pressure
- Quincke’s sign (nailbed pulsation)
- De Musset’s sign (head bobbing)
- Mid-diastolic Austin-Flint murmur in severe AR

117
Q

Investigation of Aortic Regurgitation

A

Echocardiogram

118
Q

Management of Aortic Regurgitation

A

Medical management of any associated HF

Surgery : AV indications include
- symptomatic patients with severe AR
- asymptomatic patient with severe AR who have LV systolic dysfunction

119
Q

Types of Atrial Fibrillation

A

First detected episode : first time irrespective of symptomatic or self-terminating

Recurrent : 2 or more episodes of AF
- If AF terminates spontaneously (usually last <7days) = PAROXYSMAL
- If AF not self-terminating (usually >7days) = PERSISTENT

Permanent : continuous AF, which cannot be cardioverted or if unable to do so, treatment goals are rate control and anticoagulation

120
Q

H&E of Atrial Fibrillation

A
  • Palpitations
  • Dyspnoea
  • Chest pain
  • Irregularly irregular pulse
121
Q

Investigations for Arrhythmias

122
Q

Management of Atrial Fibrillation

A

If haemodynamically unstable, cardioversion, otherwise, rate or rhythm control

Rate control if >48 hours or uncertain
- Beta blocker
- If they don’t work, combination of any 2 of:
- Beta blocker
- Digoxin
- Diltiazem

Rhythm control
- Beta blocker
- Amiodarone
- Flecainide if no structural heart disease

After an episode of paroxysmal atrial fibrillation, CHA2DS2-VASc score should be calculated, and a DOAC considered if the score is 1 or more.
- Apizaban, dabigatran, edoxaban or rivaroxaban
- Warfarin if DOAC is contraindicated or not tolerated

123
Q

Management of Supraventricular Tachycardia

A

Acute management:

  • vagal manoeuvres:
    • Valsalva manoeuvre: e.g. trying to blow into an empty plastic syringe
    • carotid sinus massage
  • IV adenosine
    • rapid IV bolusof6mg → if unsuccessful give 12 mg → if unsuccessful give further 18 mg
      • contraindicated in asthmatics - give verapamil
  • electrical cardioversion if unstable

Prevention of episodes:

  • beta-blockers
  • radio-frequency ablation
124
Q

Management of Ventricular Tachycardia

A

DC cardioversion if unstable

Drug therapy:

  • amiodarone: ideally administered through a central line
  • lidocaine: use with caution in severe left ventricular impairment
  • procainamide

Verapamil should NOT be used in VT

If drug therapy fails:

  • electrophysiological study (EPS)
  • implantable cardioverter-defibrillator (ICD) - this is particularly indicated in patients with significantly impaired LV function

Manage torsades de pointes with IV magnesium sulphate

125
Q

What are the types of rhythms in cardiac arrest?

A

Shockable - VF / pulseless VT

Non-shockable - asystole / pulseless-electrical activity (PEA)

126
Q

Reversible causes of Cardiac Arrest

A

Hs - hypoxia, hypovolaemia, hyperkalaemia, hypokalemia, hypoglycaemia, hypocalcaemia, hypothermia

Ts - thrombosis, tension pneumothorax, tamponade, toxins

127
Q

H&E of Cardiac Arrest

A
  • Unresponsive
  • Absence of normal breathing, circulation
  • Cardiac rhythm disturbance
128
Q

Investigations of Cardiac Arrest

A
  • Continuous Cardiac monitoring
  • FBC
  • U&Es
  • ABG
  • Cardiac biomarkers
129
Q

Management of Cardiac Arrest

A
  • Chest compressions : 30:2, continued while defib charges
  • Defib : single shock for VF/Pulseless followed by 2 minutes of CPR, if cardiac arrest in monitored patient do 3 shocks
  • Drugs should be delivered by IV, if not possible use interosseous route
  • Adrenaline : 1mg ASAP for non-shockable rhythms, during VF/VT, 1mg given once CPR have restarted after 3rd shock and then repeat 1mg every 3-5mins whilst ALS continues
  • Amiodarone : 300mg given to VF/pulseless VT after 3 shocks, further 150mg after 5 shocks, lidocaine if not available
  • Thrombolytic drugs : considered if PE is suspected, if given, CPR continued for extended period of 60-90 mins
130
Q

Signs of Tricuspid Regurgitation

A
  • pan-systolic murmur
  • prominent/giant V waves in JVP
  • pulsatile hepatomegaly
  • left parasternal heave
131
Q

Causes of Tricuspid Regurgitation

A
  • right ventricular infarction
  • pulmonary hypertensione.g. COPD
  • rheumatic heart disease
  • infective endocarditis (especially intravenous drug users)
  • Ebstein’s anomaly
  • carcinoid syndrome
132
Q

What is Mitral Valve Stenosis?

A

Describes the obstruction of blood flow across the mitral valve from the left atrium to the left ventricle

Leads to increase pressure within the left atrium, pulmonary vasculature and RHS of the heart

133
Q

Causes of Mitral Stenosis

A
  • Rheumatic fever

RARE

  • Mucopolysaccharidoses
  • Carcinoid and endocardial fibroelastosis
134
Q

H&E of Mitral Stenosis

A
  • Dyspnoea - inc. left atrial pressure leads to pulmonary venous hypertension
  • Haemoptysis - due to pulmonary pressures and vascular congestion
  • Mid-late diastolic murmur (best on expiration)
  • Loud S1
  • Opening snap
  • Low volume pulse
  • Malar flush
  • AF

SEVERE

  • Length of murmur increases
  • Opening snap becomes closer to S2
135
Q

Investigations for Mitral Stenosis

A
  • CXR - Left atrial enlargement
  • Echocardiography - tighter cross-sectional area of valve
136
Q

Management of Mitral Stenosis

A
  • patients with associated AF require anticoagulation - currently warfarin - DOACs for mild MS who develop AF
  • Asymptomatic patients - monitored with echo

-Symptomatic patients - percutaneous mitral balloon valvotomy or MV surgery

137
Q

RF for Mitral Regurgitation

A
  • Female
  • Low BMI
  • Age
  • Renal dysfunction
  • Prior MI
  • Prior MS or valve prolapse
  • Collagen disorders
138
Q

H&E of Mitral Regurgitation

A
  • Mild to moderate are asymptomatic

Symptoms due to failure f LV, arrhythmias or pulmonary HT:
- Fatigue
- Dyspnoea
- Oedema

Signs:
- Blowing pansystolic murmur - best at apex and radiating into axilla
- S1 may be quiet
- Severe MR may cause widely split S2

139
Q

Investigations for Mitral Regurgitation

A
  • ECG - broad P wave
  • CXR - cardiomegaly
  • Echo is crucial to diagnosis and assess severity
140
Q

Management of Mitral Regurgitation

A
  • Acute cases: nitrates, diuretics, positive inotropes and an intra-aortic balloon pump to increase cardiac output
  • If patients are in heart failure, ACE inhibitors may be considered along with beta-blockers and spironolactone
  • In acute, severe regurgitation, surgery is indicated
    • Repair over replacement
    • When this is not possible, valve replacement with either an artificial valve or a pig valve is considered
141
Q

Associations of Mitral valve prolapse

A
  • congenital heart disease: PDA, ASD
  • cardiomyopathy
  • Turner’s syndrome
  • Marfan’s syndrome, Fragile X
  • osteogenesis imperfecta
  • pseudoxanthoma elasticum
  • Wolff-Parkinson White syndrome
  • long-QT syndrome
  • Ehlers-Danlos Syndrome
  • polycystic kidney disease
142
Q

Features of Mitral Valve Prolapse

A
  • atypical chest pains or palpitations
  • mid-systolic click (occurs later if patient squatting)
  • late systolic murmur (longer if patient standing)
  • complications: mitral regurgitation, arrhythmias (including long QT), emboli, sudden death
143
Q

What is a TIA?

A

Brief period of neurological deficit due to vascular cause, typically lasting less than an hour

144
Q

H&E of TIA

A

Similar to stroke symptoms

  • Unilateral weakness
  • Aphasia or dysarthria
  • Ataxia, vertigo or loss of balance
  • Visual problems - diplopia, homonymous hemianopia, loss of vision in one eye
145
Q

Immediate treatment of TIA

A

Give Aspirin 300mg unless:
1) Patient has bleeding disorder or is on anticoagulants (immediate admission for imaging to exclude haemorrhagic stroke)

2) Patient already taking low-dose aspirin (continue dose until reviewed by specialist)

3) Aspirin contraindicated (discuss management with specialist)

146
Q

Specialist review for TIA

A

If patient has had >1 TIA/ suspected cardioembolic source/ severe carotid stenosis - discuss admission or observation with specialist

If patient has had suspected TIA in last 7 days - arrange urgent (<24hrs) by specialist

If patient has had suspected TIA over 7 days - refer specialist ASAP <7days

ADVISE PATIENT NOT TO DRIVE UNTIL SEEN

147
Q

Investigations for TIA

A

CT - should not be done unless other diagnosis suspected that can be picked up by CT

MRI - preferred, same day as specialist assessment

Carotid imaging - urgent carotid doppler unless not candidate

148
Q

Management of TIA

A

Secondary prevention - antiplatelet therapy following initial aspirin therapy
CLOPIDOGREL first-line
Aspirin + Dipyridamole if Clopidogrel not tolerated
High intensity statin - reduce non-HDL by >40%

149
Q

What is Pulmonary Hypertension?

A

Defined as a mean pulmonary arterial pressure >/ 20mmHg at rest

150
Q

Classification of Pulmonary Hypertension based on underlying etiology

A

Group 1 - pulmonary arterial HT
Group 2 - left heart disease
Group 3 - lung disease +/ hypoxia
Group 4 - chronic thromboembolic pulmonary HT
Group 5 - miscellaneous

151
Q

What is Pulmonary Arterial Hypertension?

A

Subtype of Pulmonary Hypertension

  • elevated pulmonary artery pressure
  • normal capillary wedge pressure
  • inc. pulmonary vascular resistance

Can be idiopathic or associated with CT diseases, HIV, congenial heart disease

152
Q

H&E of Pulmonary Hypertension

A
  • Dyspnoea, fatigue, chest pain, syncope
  • On exam : RV hypertrophy +/ failure, elevated JVP, peripheral oedema and prominent pulmonary component S2
153
Q

Investigations for Pulmonary Hypertension

A

Echo is first-line - estimate of pulmonary artery pressure, RV function or any underlying structural abnormalities

Right heart catheterisation confirms diagnosis

Further - pulmonary function test, ABG, CXR, CTPA

154
Q

Classification of Pulmonary Hypertension based on activity

A
  • Ordinary physical activity = no symtpoms
  • Ordinary physical activity = symptoms, not when resting
  • Slight physical activity = symptoms, not when resting
  • Symptoms when resting + worse on activity
155
Q

Management of Pulmonary Hypertension

A
  • Treatment of pulmonary hypertension is dependent on the underlying cause and severity of the condition.
  • Patients with PAH are typically treated with targeted pulmonary vasodilator therapy, such as
    • prostacyclin analogues,
    • endothelin receptor antagonists (bosentan, ambrisentan)
    • and phosphodiesterase type 5 inhibitors (sildenafil and tadalafil)
  • Other treatment options may include oxygen therapy, diuretics, and anticoagulation.
  • In severe cases, lung transplantation may be considered.
156
Q

Typical patient presentation for Infective Endocarditis

A
  • Previous normal valve (50%), MV most affected
  • Rheumatic valve disease (30%)
  • Prosthetic valves
  • Congenital heart defects
  • IVDU, TV most affected
  • Recent piercings
157
Q

Causes of Infective Endocarditis

A
  • Staph. aureus - MC cause
  • Strep. viridans - poor dental hygiene or following dental procedure
  • Staph. epidermidis - indwelling lines + valve replacement
  • Strep. bovis - colorectal cancer
  • Non-infective - SLE + malignancy (marantic)
158
Q

H&E of Infective Endocarditis

A
  • Fever
  • Malaise
  • Myalgia, arthralgia
  • Confusion
  • New regurgitant murmur
  • Vasucilitic lesions - Roth’s spots, Osler’s nodes, Janeway lesions, splinter haemorrhages
159
Q

Investigations for Infective Endocarditis

A
  • Bloods - high neutrophils, normocytic anaemia, RF positive
  • Blood culture
  • Duke’s classification - 2 major, 1 major + 3 minor, 5 minor
  • Transthoracic Echo - first line imaging
160
Q

Indications for surgery for Infective Endocarditis

A
  • Severe valvular incompetence
  • Aortic abscess (indicated by prolonged PR)
  • Infections resistant to Abx/ Fungal infections
  • Cardiac failure refractory to standard treatment
  • Recurrent emboli after Abx therapy
161
Q

Blind management of Infective Endocarditis

A
  • Amoxicillin for native valve
  • Vancomycin + gentamicin if penicillin allergic, MRSA or sepsis
  • Vancomycin + rifampicin + gentamicin for prosthetic valve
162
Q

Management of Infective Endocarditis if Staph.

A

Native valve
- Flucloxacillin
- Vancomycin + rifampicin if penicillin allergic or MRSA

Prosthetic valve
- Flucloxacillin + rifampicin + gentamicin
- Vancomycin + rifampicin + gentamicin if penicillin allergic or MRSA

163
Q

Management of Infective Endocarditis if Strep.

A

Fully-sensitive
- Benzylpenicillin
- Vancomycin + gentamicin if penicillin allergic

Less-sensitive
- Benzylpenicllin + gentamicin
- Vancomycin + gentamicin if penicillin allergic

164
Q

Three main patterns of presentation + RF for PVD

A
  • Intermittent claudication
  • Critical limb ischaemia
  • Acute limb-threatening ischaemia

RF : elderly, male, Hx of HT, smoking, previous stroke/TIA

165
Q

H&E of Intermittent Claudication

A
  • Aching or burning in leg following walking
  • Patients can typically walk a predictable distance before symptoms
  • Usually relieved within minutes of stopping
  • Not present at rest
166
Q

H&E of Critical limb ischaemia

A

1 or more of:

  • Rest pain in foot for >2 weeks
  • Ulceration
  • Gangrene

Patients report hanging their legs out of bed at night to ease pain

167
Q

H&E of Acute limb-threatening ischaemia

A

1or more of the 6 P’s:

  • Pale
  • Pulseless
  • Painful
  • Paralysed
  • Paraesthetic
  • Perishingly cold
168
Q

Factors suggesting Thrombus for PVD

A
  • Pre-existing claudication with sudden deterioration
  • No obvious source of emboli
  • Reduced or absent pulse in contralateral limb
  • Evidence of vascular disease
169
Q

Factors suggestive of Embolus in PVD

A
  • Sudden onset of painful leg (<24hrs)
  • No Hx of claudication
  • Clinically obvious source of embolus
  • No evidence of PVD
  • Evidence of proximal aneurysm
170
Q

Investigations for PVD

A

Duplex US for intermittent claudication

ABPI

Handheld arterial Doppler for Acute limb ischaemia
- If signals present, ABPI
- <0.5 indicates Critical limb ischaemia

Magnetic Resonance Angiography before any intervention

171
Q

Management of PVD

A
  • Clopidogrel
  • Smoking cessation + exercise training
  • Treat comorbidities
  • Atorvastatin 80mg if established CVD
172
Q

Management of severe PVD or Critical limb ischaemia

A

Endovascular revascularization
- percutaenous transluminal angioplasty +/- stent placement
- endovascular techniques are typically used forshort segment stenosis (e.g. < 10 cm), aortic iliac disease and high-risk patients

Surgical revascularization
- surgical bypass with an autologous vein or prosthetic material
- endarterectomy
- open surgical techniques are typically used forlong segment lesions (> 10 cm), multifocal lesions, lesions of the common femoral artery and purely infrapopliteal disease

Amputation if not suitable for other interventions

173
Q

Management of Acute limb-threatening ischaemia

A
  • ABC approach
  • IV opioids
  • IV unfractionated heparin if surgery not immediate
  • Vascular review

Definitive management:
- Intra-arterial thrombolysis
- Surgical embolectomy
- Angioplasty
- Bypass surgery
- Amputation if irreversible

174
Q

Symptoms of Lacunar Stroke

A

Small infarcts around basal ganglia, internal capsule, thalamus and pons

May result in pure motor, pure sensory, mixed signs or ataxia

175
Q

Effects of Stroke in Anterior Cerebral Artery

A

Contralateral hemiparesis and sensory loss, lower>upper

176
Q

Effects of Stroke in Middle Cerebral Artery

A

Contralateral hemiparesis and sensory loss, upper>lower

Contralateral homonymous hemianopia

Aphasia

177
Q

Effects of Stroke in Posterior Cerebral Artery

A

Contralateral homonymous hemianopia with macular sparing

Visual agnosia

178
Q

Effects of Stroke in PICA

A

AKA lateral medullary syndrome / Wallenberg syndrome

Ipsilateral facial pain and temperature loss

Contralateral limb/torso pain and temperature loss

Ataxia

Nystagmus

179
Q

Effects of Stroke in AICA

A

AKA lateral pontine syndrome

Similar to PICA but

Ipsilateral facial paralysis and deafness

180
Q

Effects of Stroke in Retinal/Opthalmic Artery

A

Amaurosis Fugax

181
Q

Effects of Stroke in Basilar Artery

A

Locked in Syndrome

182
Q

Effects of Weber’s Syndrome Stroke

A

Branches of PICA that supply midbrain

Ipsilateral CN III palsy

Contralateral weakness of upper and lower extremity

183
Q

Investigations for Stroke

A

Non-contrast CT head scan

Acute ischaemic strokes
- May show areas of low-density in grey and white matter of territory (may take time to show)
- Other signs are hyper dense artery sign (visible immediately)

Acute haemorrhagic strokes
- Show areas of hyper dense material (blood) surrounded by low density (oedema)

184
Q

Management of Ischaemic Stroke

A

The patient should be offeredthrombolysis (alteplase) if:

  • patients present with 4.5 hours of onset of stroke symptoms
  • the patient has not had a previous intracranial haemorrhage, uncontrolled hypertension, pregnant etc.

Once haemorrhagic stroke has been excluded patients should be given aspirin 300mg as soon as possible and antiplatelet therapy should be continued.

Mechanical thrombectomy if confirmed occlusion of proximal anterior circulation.

185
Q

Management of Haemorrhagic Stroke

A
  • Specialist consultation
  • Supportive measures
  • Stop anticoagulants and antithrombotics, reverse any coagulation