Cardiovascular Flashcards
What is a cause of an pulsus paradoxus? (abnormally large drop in BP on inspiration)
cardiac tamponade
Clinical features of an unruptured AAA
Can be asymptomatic
Back pain
Pulsating mass on abdo exam
Clinical features of a ruptured AAA
Abdominal pain radiating to the back Sweating SOB Shocked Dilated abdomen
Best imaging for a AAA
US
At what size can a AAA be monitored every 6m
< 5.5cm
What is used to monitor a AAA
Exam and US
When is surgery considered in a AAA
> 5.5cm or rapidly expanding
Two options for surgical intervention in AAA
Open / endoluminal approach
Acute approach to ruptured AAA
ABCDE
oxygen
contact vascular team
Prophylactic AB in AAA
Cefuroxime and Metronidazole
Type A dissecting aortic aneurysm
Includes the ascending aorta, starts proximal to the left SA branch
Type B dissecting AA
starts distal to the left SA brach
Aortic dissection risk factors
A
B
C
Age
Baby / BP
Connective tissue disorders
If dissection progresses proximally it can cause…
MI - affects the coronary arteries
If dissections progresses distally it can cause…
renal hypoperfusion
Typical description of pain in dissecting AA
tearing back pain between scapulae
Clinical features of a dissecting AA
Back pain - tearing, scapula Loss of peripheral pulses May mimic an MI May be radio - radio delay Neuro symptoms if spinal arteries involved Shock if rupture
Bedside test for dissecting AA
ECG
Imaging (3) for dissecting AA
US
CT/MR
TO Echo
Management of a type A dissecting AA
Surgical
Management of type B dissecting AA
Medical - anti hypertensive and monitor
Potential complications in dissecting AA (4)
MI
Acute renal failure due to ischeamia
Neurological damage - hemiplegia
Lower limb ischaemia
Primary causes of myocardial disease H A R D
Hypertrophic obstructive
Arrhythmogenic RV
Restrictive
Dilated
Secondary causes of myocardial disease
systemic
ischaemic
hypertension
inflammatory
what may dilation cardiomyopathy mask?
hypertrophy
3 common causes of dilated CM
Hypertension
Alcohol
Chemotherapy
What is found on biopsy in dilated cardiomyopathy?
haphazard architecture
enlarged myocytes
t cell infiltration
fibrosis
Signs of myocardial disease
Peripheral
Heart
Lung
Abdo
Peripheral
- cyanosis
- oedema
Heart
- tachycardia
- raised JVP
- S3
Lungs
- tachypnoea
- basal creps
- pleural effusions
Abdo
- ascites and hepatomegaly
Blood tests in dilated cardiomyopathy
UandEs LFTs TFTs Iron studies Infection screen Autoimmune screen Genetic screening
Possible ECG tests for DCM
Normal ECG
24 hr ECG
Exercise testing
Imaging in DCM
Echo
CXR
Cardiac MR
Complications of ventricular dilation
Tachyarrhythmias
LV thrombus w/ embolism causing stroke
Valve dysfunction
How does hypertrophic cardiomyopathy causes reduced CO?
Stiff ventricular walls lead to reduced diastolic filling
main cause of hypertrophic cardiomyopathy?
genetic
where is abnormal tissues focused in hypertrophic cardiomyopathy? and what does this lead to
septal
leading to left ventricular outflow obstructin
ECG results in hypertrophic cardiomyopathy?
may be normal
may be ST depression and T wave inversion
Imaging in hypertrophic cardiomyopathy?
ECHO
Cardiac MRI
Patient education in hypertrophic cardiomyopathy?
Controlled exercise to prevent sudden death
Medical treatment in hypertrophic cardiomyopathy?
How does each drug work
Beta blockers - improve diastolic filling and reduce myocardial demand
Calcium channel blockers - negatively inotropic, reduce HR during activity
Disopyramide - sodium channel blocker, antiarryhthmic
Other management of hypertrophic cardiomyopathy? (4)
ablate the septum
pacemaker
implantable defib
myomectomy
How does restrictive cardiomyopathy cause poor CO
Poor diastolic filling, unable to increase due to a FIXED stroke volume
Causes of restrictive cardiomyopathy
idiopathic systemic sclerosis infiltration e.g. from amyloid familial fibrosis due to infection
restrictive cardiomyopathy is difficult to distinguish clinically from?
constrictive pericarditis
clinical features of restrictive cardiomyopathy
Peripheral
- SOB
- Fatigue
- oedema
Heart
- palpable apex
- Loud S3 / S4
- Raised JVP
Lung
- pulmonary oedema if severe
Abdo
- hepatomegaly
P wave changes in restrictive cardiomyopathy
P mitrale and P pulmonale
Imaging + other tests in restrictive cardiomyopathy
Echo
Cardiac catheterisation
Most common viral cause of myocarditis
Coxsackie virus B
Causes of myocarditis
Infective - bacterial / viral etc
Immune reactions - post viral, rheumatic fever
Transplant rejection
Clinical features of myocarditis
spans from asymptomatic to heart failure
Can be - fever, SOB, chest pain, palpitations, tachycardia
Main blood tests in myocarditis
Serology for infectious agents
ECG sign in hypercalcaemia
Shortened QT interval
Imaging if suspect heart valve disease
CXR
Echo - TTE / TOE
Complications of replacement valves
Infective endocarditis
PE / DVT
Haemolysis / anaemia
Arrhythmia resulting from mitral stenosis
AF (increase in left atrial pressure)
Two main causes of mitral stenosis
Rheumatic fever and senile calcification
Symptoms of right heart failure
Dyspnoea
Reduced exercise tolerance
Cough Haemoptysis
Palpitation
Signs on examination of mitral stenosis
Clubbing - heart failure
Raised JVP
? anaemia due to haemolysis
Early diastolic murmur
ECG signs of mitral stenosis
AF
Right heart failure - right axis deviation
P mitrale (if in sinus rhythm)
Signs of hf on CXR
ABCDE
Aveolar oedema Kerly B lines - interstitial oedema Cardiomegaly Dilated upper lobe vessels Pulmonary effusions
Causes of mitral regurg
Post MI
Infective endocarditis
Rheumatic fever
General symptoms of heart failure
SAD - syncope, angina and dyspnoea
- SOB
- Palpitations
- Chest pain
- Syncope / presyncope
- Swelling / weight gain
- orthopnea
- paraoxysmal nocturanl dyspnoea
- nocturia
- cough with pink frothy sputum
- abdo pain / swelling
Mitral regurg on clinical exam
pansystolic murmur
radiates into the axilla
Management in heart valve problems
Medical
- AF control
- anticoag in valve replacement
Surgical
- valve repair
- valve replacement
3 causes of aortic stenosis
Age related
Bicuspid valve e.g. turners syndrome
Rheumatic fever
Pulse in aortic stenosis
narrow pulse pressure
slow rising
Which type of arrhythmia is common in AS
AV block - calcification in this area
Which type of medication should be avoided in AS?
Drugs that reduce after load e.g. nitrates and ACE inhibt
Causes of AR?
Infective endocarditis
Rheumatic fever
Connective tissue diseases
Pulse in AR
Collapsing and wide pulse pressure
Medications to be use in regurgitation conditions
vasodilators to reduce afterload
HF definition in terms of ejection fraction
<40%
New York heart association classification of HF 1 2 3 4
1 no symptoms
2 symptoms on moderate exertion (climbing a flight of stairs)
3 mild effort (100m on flat ground)
4 symptoms at rest
How does reduced renal perfusion in heart failure contribute to further decompensation
Activates RAAS and sympathetic system
- fluid retention
- vasoconstriction
- fluid overload
- increased muscle stretch - the cycle continues
Causes of left ventricular failure
1) Low output
2) Increased demand
- IHD
- valve disease
- HTN
- cardiomyopathy
- pregnancy
- anaemia
Signs of heart failure
Clubbing Peripheral cyanosis Tachycardia Tachypnoea Displaced apex 3rd heart sound basal creps oedema - sacral and pedal
Bed side tests in heart failure
FBC U&Es (kidney function) LFTs BNP TFTs Bone and clotting profile Fasting glucose and lipids Urine dip
ECG
CXR
Imaging in heart failure
ECHO = gold standard
Acute management of heart failure
ABCDE
- sit up
- ECG
- Full set of bloods
- ABG - look for hypoxia
- CXR
Acute medical management fo HF if BP >100
IV furosemide
IV GT
IV opiates
Acute medical management fo HF if BP <100
Consider CPAP - aid venodilation and reduce preload
Consider ICU
Important education in CHF
Regular vaccinations fluid input and output Exercise important good diet stop smoking
3 key drugs in heart failure
Diuretic
ACE inhib
Beta blocker
Device therapy for heart failure
Implantable defib
Cardiac biventricular pacemakers
Which drugs are contraindicated in HF?
Calcium channel blockers and NSAIDs - precipitate decompensation
Anteroseptal ST elevation MI
ECG changes
Coronary artery
V1-4
LAD
Inferior ST elevation MI
ECG
changes
Coronary artery
II, III and aVF
Right coronary
Anterolateral ST elevation MI
ECG changes
Coronary artery
I, aVL and V1-4
LAD / circumflex
Lateral ST elevation MI
ECG changes
Coronary artery
I, aVL +/- V5-6
Left circumflex
Posterior ST elevation MI
ECG changes
Coronary artery
Tall R waves V1-2
Left circumflex / right coronry
Which valve is most commonly affected in infective endocarditis
Infective endocarditis in intravenous drug users most commonly affects the tricuspid valve
Dose of statin
Primary prevention
Secondary “”
20mg
80mg
AF rate control therapies (2)
Digoxin
Beta blockers
Diltiazem
AF anti-arrhythmics
amiodarone
flecanide
Anticoagulation in AF
Heparin / Warfarin / NOAC
Main complication of AF
Systemic embolisation
Atrial flutter usually accompanied by with arrhythmia?
AV block
Two treatment strategies for atrial flutter
Rate control - antiarrythmics and anticoagulants
curative - DV cardioversion / ablation
WPW definition
atrial re-entry tachy + accessory pathway linking atrium and ventricle
ECG signs of WPW
Short PR, delta wave and wide QRS
Treatment options for WPW
Invasive
Medical
DC cardioversion / ablation
rate control - beta blocker / calcium channel blocker
Common causes of VT
Ischaemia
Drugs
metabolics problems
long QT syndrome
VT presentation on ECG
broach complex tachy
VT treatment
medical
invasive
Amiodarone / lidocaine
DC cardioversion
VT recurring, treat with
Implantable cardiac defib
VT main complication?
VF
Presentation of VF
syncope or cardiac arrest
Treatment of VF
Cardiac defib
Definition of first degree block?
PR longer than 5 small squares
Definition of mobitz type 1
PR interval lengthens then drops
Definition of mobitz type 2
1:3 or 1:2 p to QRS ratios (no link to PR interval)
Definition of third degree block?
no association between Ps and QRSs
Medical treatment for AV block
atropine
Gold standard for symptomatic 2nd or 3rd degree heart block
Cardiac pacing
Cardiac risk factors (8)
HTN Hyperlipidaemia IHD Diabetes FH Smoking Cocaine - young people?
What is seen in aortic dissection on CXR
widened mediastinum
Aortic dissection suspected - two types of imaging
CXR
CT
Imaging in PE
CTPA
ACS immediate management
Morphine Oxygen (if sats below 94%) Nitrates Aspirin Clopidogrel Antiemetic
PCI vs Fibrinolyitc therapy for ST elevation
Can you initiate treatment within 120 mins
How to recognise bifasciular block
- RBBB / LBBB
- And left/ right axis deviation
How to recognise trifesicular block
- RBBB / LBBB
- And left/ right axis deviation
- Above + AV node block
What can trifesicular block lead to?
heart block
In IVDU which side of the heart is usually affected by endocarditis?
RHS
Causes of the introduction of bacteria into the blood
IVDU
Surgery
Lines being put in etc
Liver / renal failure
2 commonest bacteria causing infective endocarditis
Strep virians
Staphylococcus
2 non infective causes of endocarditis
SLE
Marantic
In which patient presentation should you have a high index of suspicion for IE
New murmur and fever
Valves affected by IE in order of how common
Aortic > Mitral > Tricuspid
Clinical features of IE
Fever Rigors Sweats High temp Malaise Fatigue Anorexia Splenomegaly
Findings on peripheral exam in IE
Clubbing Splinter haemorrhages Oslers nodes Janeway lesions Roth spots
Bloods in IE
CRP
FBC
LFTs
UandEs
BLOOD CULTURES - 3 SITES, 1-2hrs apart, must be +ve in two
Bedside tests in IE
ECG
Urine dip and culture
Swab wounds / cavaties
Imaging in IE
TOE
CXR
Major in dukes criteria
2 seperate +ve blood cultures
+ve echo - vegetation / abscess
New valve regurg
Minor in dukes criteria
Risk factor for IE Fever <38 Vascular phenomena e.g. embolic stroke Immunological phenomena e.g. +ve blood culture not meeting major criteria \+ve echo no meeting major criteria
Dukes criteria diangosis
2 major
1 major, 3 minor
all 5 minor
what must be confirmed before starting treatment of IE?
3 +ve blood cultures
Importance of the presence in mechanical valve in IE?
More aggressive medical treatment and lower threshold for surgery
Monitoring in IE
Vital signs bloods blood cultures = repeat consider PIC line ECG ECHOs
Commonest cause of death in IE
Septic thromboemboli and infarcts
first line for AF in most - >
rate control
drug to be given alongside cardioversion
amiodarone
acute temporary causes of AF
include alcohol abuse, hyperadrenergic states or sympathomimetic drug intoxication, cardiac or non-cardiac surgery, electrocution, myocarditis, PE, chronic pulmonary disease, and hyperthyroidism
AF patients with hemodynamic compromize require with new onset AF of <48hrs …
Immediate DC cardioversion
AF patients with a wide complex AF suggestive of WPW syndrome require…
Immediate DC cardioversion
AF patients with evidence of conducting system disease
Pacemakers insertion before DC cardioversion
Pt with LV dysfunction, choice of rate control drug =
diltiazem and digoxin
Malignant hypertension defined as?
200 / 130
Which end organs can be damaged by high blood pressure?
Heart, kidney, eyes and brain
Most common cause of secondary hypertension
Renal disease
Definition of essential hypertension
140 / 90
RF for HTN
Metabolic syndrome Obesity High alcohol intake DM Black ancestry Age 60+ FH
Grade 1 HTN retinopathy
Slight arterionlar narrowing
Grade 2 HTN retinopathy
Definite narrowing
Grade 3 HTN retinopathy
Cotton wool spots and flame haemorrhages
Grade 4 HTN retinopathy
Papilloedema
Blood tests in HTN
Lipids
U&Es
Fasting glucose
Hypertensive emergency how fast should BP be reduced?
25% in 4hrs
BP aim in diabetic patients
< 130mmHg
1st line for HTN in under 55s
ACE inhibi
1st line for HTN in over 55s / AFC
Calcium channel blocker
2nd line in essential HTN
A + C
3rd line in essential HTN
A + C + D
lifestyle measures to combat HTN
Lose weight
regular exercise
eat well
stop smoking
Mechanism of action of aspirin
Thromboxabe A2 inhibitor so inhibits platelets
Clopidogrel mechanism of action
inhibits platelet function by inhibiting ADP induced platelet aggregation
Ticagrelor MOA
inhibit platelet aggregation
MOA of statins
HMG- CoA reductase inhibitors
SE of beta blockers
Bradycardia Heart block Hypotension Fatigue Impotence
Two classes of angina
Stable - relieved by rest and brought on by prolonged physical activity
Unstable - severe and persistent. not relieved by rest.
Causes of angina
Atherosclerosis
Anaemia
AS
Tachyarrythmias
Modifable risk factors for angina
Obesity Diet - low fat Smoking Diabetes Sedentary lifestyle Stress excess alcohol
Non modifiable risk factors for angina
Family hx Increasing age Males Post menopausal Asian race
ECG findings in angina
ST depression
Investigations for angina in a non acute setting
ECG Exercise stress test Stress echo Myocardial perfusion scan Coronary angiography
Acute treatment of stable angina
Nitrates - sublingual GTN
Medical treatment of stable angina
Beta blockers - first line
Calcium channel blockers
Nitrate tablets
Invasive management of stable angina
PCI
Bypass surgery
Medication post stent
Aspirin for life
Clopi added for a length of time depending on the type of stent inserted
WHO definition of MI (two of) ….
Chest pain >15min, good clinical hx
Dynamic ECG changes - ST elevation / depression, Q waves, T waves
Rise in troponin
3 types of condition in ACS
STEMI
NSTEMI
Unstable angina
STEMI defining features
ST elevation >2mm in two congruent leads (V1-6) OR 1mm in limb leads OR new LBBB
Troponin +ve
NSTEMI defining features
Troponin +ve
Without STEMI on ECG but may be ischaemic changes
Unstable angina defining features
Minimal ECG changes
Troponin -ve
High risk of MI in 30 days
Specific pathology of MI
Rupture of atherosclerotic plaque, causing ischaemia to the heart
Management of ACS
A - airway B - sats - low O2 - RR - listen to chest
C - cap refil - HR - BP - ECG - Blood - FBC, U&E, Troponin D - glucose
E
- drugs - aspirin, nitrates
Aspririn 300mg
Second anti platelet
Consider
- anti thrombotic therapy
- PCI
Medication post MI
Beta blocker - immediately and titrate up
ACEi - within 24hrs
Statin - immediate
Continue on an anti-platelet
Complications on an MI
Angina
Arrhythmia
Valve disease
MOA of amiodarone
blocks patassium channels
Amiodarone SE
- thyroid dysfunction
- corneal deposits
- pulmonary
- fibrosis/pneumonitis
- liver fibrosis/hepatitis
- peripheral neuropathy, myopathy
- photosensitivity
- ‘slate-grey’ appearance
- thrombophlebitis and injection site reactions
- bradycardia
Causes of pericarditis
Infective - Virus, TB, Rheumatic fever Vascular - Post MI Metabolic - Uraemia (acute renal failure) Autoimmune - CTD, SLE Trauma - bleed post surgery
Signs of pericarditis on ECG
Widespread concave ST elevation
Treatment of pericarditis
NSAIDs and treat the cause
What is pulsus paradoxus
drop in arterial pressure of greater then 10 when the patient is in inspiration (seen in cardiac tamponade)
Pericardial effusion vs cardiac tamponde
Pericardial effusion - fluid build up in the pericardium
Cardiac tamponade - when the heart is unable to fill properly due to a pericardial effusion
Causes of pericarial effusion
Vascular - MI, aortic dissection Infection - TB Trauma - post surgery Autoimmune Malignancy Metabolic - renal failure
Beck’s triad for tamponade
Distant heart sounds
Distended jugular veins - increased JVP
Decreased arterial pressure
Causes of acute limb ischaemia
Vascular - thrombosis from atheroma or embolus from the heart (e.g. AF)
Trauma
Graft occlusion post surgery
6 clinical features of an ischaemic limb
Pale Perishingly cold Pulseless Pain Paralysed Paraesthetic
Imaging in acute limb ischaemia
Arteriogram
Risk factors for atherosclerosis in LL
Atherosclerosis elsewhere DM Hyperlipideamia FH Smoking
Bedside test in chronic limb ischaemia
CV exam
ABPI
How is ABPI calculated?
largest of the popliteal systolic / brachial systolic
> 1 - normal
Diabetic hardened veins may give a false +ve result
Blood tests in chronic limb ischaemia
FBC U&E LFTs blood glucose Clotting Platelets
Conservative treatment of chronic limb ischaemia
lose weight
stop smoking
good diet
medical treatment of chronic limb ischaemia
aspirin
statin
control diabetes
surgical options in chronic limb ishcaemia
angioplasty
bypass graft
amputation
Screening for AAA
Screening for an abdominal aortic aneurysm consists of a single abdominal ultrasound for males aged 65
In venous insufficiency
Doppler US looks for?
Duplex US looks for?
reflux
anatomy / flow of the vein
Where do arterial ulcers occur?
Heels and toes
Arterial ulcer presentation
On heel and toes Foot is painful Cold Difficult to feel pulses ABPI low
Normal ABPI score
1.0 - 1.2
ABPI score > 1.2 may indicate?
may indicate calcified, stiff arteries. This may be seen with advanced age or PAD
MOA of clopidogrel
Blocks platelet aggregation
Virchow’s triad
Abnormal blood flow e.g. stasis
Vessel wall abnormalities
Hypercoagulable state
Causes of blood stasis
Dehydration
Nephrotic syndrome
Post operatively
Immobility
Causes of vein wall abnormalities
trauma
varicose veins
phlebitis
Hypercoaguable state can be due to
Pregnancy COCP Obesity Maligancy Hereditary
Anticoagulation treatment post VTE
3-6 m if known trigger now eliminated
If not - long term
Hereditary causes of thrombophilia
Factor V leiden
Antiphosopholipid syndrome
Protein C and S deficiency
Antithrombin deficiency
Most common heritable form of thrombosis
Factor V leiden - autosomal dominant
Results in overactivity of the clotting cascade
ECG changes for thrombolysis or percutaneous intervention ->
ECG changes for thrombolysis or percutaneous intervention:
ST elevation of > 2mm (2 small squares) in 2 or more consecutive anterior leads (V1-V6) OR
ST elevation of greater than 1mm (1 small square) in greater than 2 consecutive inferior leads (II, III, avF, avL) OR
New Left bundle branch block
Which group of medications are associated with long QT?
Antipsychotics
Which coronary artery supplies the AV node?
Right coronary artery
Acute management of PE
Normotensive - LMWH
Hypotensive - Thromboylsis
Second line management of heart failure
second-line treatment is now either an aldosterone antagonist, angiotensin II receptor blocker or a hydralazine in combination with a nitrate
After second line management, if symptoms persist in hf what are the next options?
if symptoms persist cardiac resynchronisation therapy or digoxin* should be considered.
vaccinations in heart failure
yearly flu
one of pneumococcal
NIV used in pulmonary oedema
CPAP
Types of cardiac implantable devices
Pacemaker
Bi ventricular
ICD
Implantable cardiac loop recorder
Classic cause of digoxin toxicity
hypoK