Cardio and vasc Flashcards
Clinical presentation of lymphedema
• Non-pitting edema • Feeling of heaviness or fullness, aching pain in limb • Impaired mobility • Skin changes in advanced cases ○ Discolotation ○ Hyperkeraosis ○ Verrucous hyperplasia ○ Papillomatosis ○ Deformity (elephantiasis)
Causes of lymphedema
Primary (congenital)
○ Milroy’s syndrome (congenital hereditary lymphedema)
Secondary ○ Infection § Filariasis (#1 cause worldwide, developing nations) § Post-op infection ○ Malignant infiltration § Axillary, groin, intrapelvic ○ Radiation/surgery (#1 cause in developed world) § Axillary, groin lymph node removal
Treatment lymphedema
Compression bandages and sleves
Gentle exercise
Massage and manual lymph drainage therapy
Skin care (moisturisers, topical/systemic treatment of fungal and bacterial infections)
Risk factors for venous thrombi embolism
THROMBOSIS ○ Trauma, Travel ○ Hypercoagulable state, history of previous VTE ○ Recreational drugs (IVDU) ○ Old age >60 ○ Malignancy ○ Birth control pill (OCP) ○ Obesity, obstetrics ○ Surgery, smoking ○ Immobilisation ○ Sickness (CHF, MI, nephrotic syndrome, vasculitis)
PERC
Old Age Tachycardia O2 saturation Prior history VTE Recent trauma/surgery Hemoptysis Exogenous oestrogen clinical signs of VTE
If all are negative, can rule out PE. If any one is positive, must move onto Wells.
Treatment for VTE
Anticoagulant: LMWH or Heparin if in renal failure; start Warfarin at same time. Stop LMWH/Hep when INR in therapeutic range for 2 days.
If haemodynamically unstable: thrombolyse
If anticoag CI: IVC filter of surgical thrombectomy
Long-term Warfarin or NOAC (3-6mo or lifelong if recurrent)
Causes of thrombophilia
Genetic
- overactivity of pro-coag factors (Factor V leiden and prothrombin mutation)
- Deficiency of anti-coag factors (anti-thrombin III, protein C and S)
Acquired
- Antiphospholipid syndrome (lupus anticoagulant, anticardiolipin, anti PLD antibody)
- Heparin induced thrombocytopenia (immune reaction against heparin)
- Sickle cell disease (prothrombotic state induced by hyper viscous blood)
Investigating DVT
- Well’s
- D-dimer: if neg and wells shows low pretest probability, exclude DVT
- USS of leg id D-dimer >0.5 and/or high pre-test probability
- Bloods
- FBE, coag studies +/- thrombophilia screen
Investigating PE
- PERC. If none are positive, can rule out PE. If 1 + are positive, calculate Well’s.
- Well’s criteria
- D-dimer: if negative, along with low- pretest probability, PE can be excluded. Otherwise do CTPA
- CTPA first line diagnostic
CXR, ECG, ABG, FBE, blood film, procoag screen
Classic PE ECG changes
Sinus tachycardia
T wave inversion leads V1-V4 +/- II, III, aVF
RV strain pattern
Non specific ST segment changes or T wave changes
S1Q3T3: S wave lead 1, Q wave and T wave inversion in lead III
RBBB (complete or incomplete)
R axis deviation
Classic presentation and investigation results for polymyalgia rheumatica
Old (>50) white female with morning stiffness and pain (worse in evening) of shoulder, arms, hip girdle and neck and began relatively suddenly. + general malaise, fatigue, weight loss. Family HX.
Raised ESR
What condition is assoc in polymyalgia rheumatic?
Temporal arteritis
Treatment polymyalgia rheumatica
Low dose corticosteroids
2 large vessel vasculitides and their treatment
Giant cell arteritis
Takayasu’s arteritis
Steroids
2 medium vessel vasculitides and their treatment
Polyarteritis nodosa
Kawasaki disease
Treatment is steroids + IV cyclophosphamide
an example of p-anca associated small vessel vasculitis + treatment
Churg-strauss syndrome.
• Granulomatous inflammation of vessels with hypereosinophilia and eosinophilic tissue infiltration
(often lung involvement)
Treatment is steroids + IV cyclophosphamide
an example of C-anca associated small vessel vasculitis + treatment
Wegener’s granulomatosis
- Granulomatous inflammation of vessels of resp tract, lungs and kidneys
Treatment is steroids + IV cyclophosphamide
An example of small vessel ANCA negative vasculitis +treatment
Henoch-Schonlein purpura
Treatment is steroids + IV cyclophosphamide
Mainstays of diagnosing vasculitis?
Angiography
Biopsy of affected vessel
Always do ANCA as well.
What does an isolated systolic HTN reflect generally?
High pulse pressure, seen in aged and stiff arteries
Difference between primary and secondary HTN, which is more common?
Primary HTN - no specific cause identified (95%)
Secondary HTN - specific cause identified (5%). Treatable but more severe than primary.
What are some of the causes of secondary hypertension?
Chronic Renal disease (Polycystic kidneys, diabetic glomerulosclerosis, glomerulonephritis)
Vascular - Renal artery stenosis and coarctation of aorta
Endocrine - Adrenal tumours secreting aldosterone, cortisol, ACTH, catecholamines (pheochromocytoma); cushing’s
Sleep apnoea
Meds (steroids, high oestrogen states such as OCP, HRT, pregnancy)
NOT atherosclerosis (except in case of renal artery stenosis)
In what patients with HTN do you investigate for a secondary cause?
Young patients (<30 years)
Resistant HTN
Presence of certain SX
Examples of renal causes of secondary HTN
Diabetic glomerulosclerosis
Polycystic kidneys
Glomerulonephritis
Medications that can cause secondary HTN
Corticosteroids
High oestrogen states(OCP, HRT, pregnancy)
Vascular complications of HTN
- Worsens Arteriosclerosis
- Worsens Atherosclerosis -> aneurism / dissection
- Hyaline arteriolosclerosis
- Berry aneurysm
- Acute plaque event -> thrombus formation, thromboembolism
Cardiac complications of HTN
- IHD and infarct
- LV concentric hypertrophy
- Cardiac failure
Kidney complications of HTN
- Benign nephrosclerosis (elevated BP transmitted to glomeruli which respond with tubular fibrosis, sclerosis and atrophy & hyaline arteriolosclerosis -> kidney ischaemia)
Brain complications of HTN
Ischaemic Strokes (atherosclerotic TE)
Haemmhoragic stroke (due to hyaline arteriolosclerosis in basal ganglia or SA haemmhorage due to ruptured berry aneurysm)
Eye complications of HTN
Hypertensive retinopathy
(hyalinised retinal vessels are weak and leaky, can bleed or lead to ischaemia).
What factors determine the treatment of HTN?
Degree of HTN (stage 1 SBP 140-179 & DBP 90-109; severe SBP>180 & DBP>110)
Presence of CV risk factors
Evidence of end organ damage (cardiac, arteries, kidneys)
How is the treatment protocol (pharm vs lifestyle modification) for different categories for HTN divided up?
Stage 1 SBP 140-179 & DBP 90-109 with NO CV RFs: life style modification (pharm treatment if still high after 6 months)
Stage 1 SBP 140-179 & DBP 90-109 WITH CV RFs or end-organ damage: start pharmacological treatment
Severe HTN SBP>180 & DBP>110: start pharmacological treatment
Pharm. treatment (order of use) for HTN
Step 1:
If <55yo, ACE inhibitor (or AT1Rantag)
If >55yo or afro-carribbean origin - Ca channel blocker
if >65yo - low dose thiazide
Step 2:
ACE inhibitor + Ca channel blocker
Step 3:
Add thiazide diuretic (or beta blocker only if patient has IHD and heart failure)
If BP still elevated after step 3 = RESISTANT HTN
Step 4: Refer. Consider further diuretic (thiazide-like or spironolactone) or beta or alpha blocker
When NOT to use Ca channel blocker in HTN
If patient has heart failure
When NOT to use ACE inhibitor in HTN
In severe renal impairment and pregnancy
What drug combinations to avoid in HTN and why? (3)
- Ace inhibitor + K-sparing diuretic (spironolactone) - risk of hyperkalaemia
- Ca channel blocker + beta blocker - risk of heart block
- ACEi + AT1R antag - not shown to be clinically effective
LONG-TERM Treatment protocol for CHF
- Lifestyle modification
Smoking and alcohol cessation
Na and fluid restriction
Diet and exercise (weight control) - Treat underlying cause and aggravating factors (valvular disease/arrhythmia; thyroid, infection, anaemia, HTN)
- Meds
ACE inhibitor/ARB (slows progression, improves survival)
+ Beta blocker (slows progression, improves survival)
+/- aldosterone antag*(spironolactone) if severe and symptomatic
+/- diuretic (furosemide) if fluid overloaded
+/- digoxin (SX control only)
+/- antiarrhythmic (if AF)
+/- Warfarin (if AF, prior TE or LV thrombus on echo)
*mortality benefit
ACUTE treatment of CHF (Acute pulmonary oedema)
LMNOPP
Lasix (furosemide) Morphine IV Nitroglycerin (GTN) O2 (if hypoxaemic) Positive airway pressure (CPAP/BiPAP) Position
Treat underlying cause (MI/ischaemia/arrhythmia etc)
Precipitants/exacerbaters of heart failure
MADHATTER: MI/ischaemia Anaemia Drugs (NSAIDs, steroids, non-compliance) HTN Arrhythmias Thyroid Toxic (infection) Endocarditis/embolus Renal failure
Signs/Symptoms of Heart failure
Systolic (fwds) dysfunction: S3 Displaced apex beat Mitral/tricuspid regard fatigue syncope systemic hypotension cool extremities and slow cap refill w peripheral cyanosis
Diastolic (backwards) dysfunction:
Dyspnoea, orthopnoea, PND
Cough
Crackles
Peripheral edema
Incr JVP
Hepatomegaly, pulsatile liver
Pathophysiology of heart failure
Incr preload leads to incr work (septal defect or regurg)
Decr strength/contractility (IHD/cardiomyopathy)
Incr resistance leads to incr work (HTN, stenosis)
What conditions does IHD encompass?
- Stable angina
- Unstable angina
- MI (STEMI or NON-STEMI)
- Sudden cardiac death
Stable angina vs unstable angina
Stable:
- pain comes on w exercise, cold, stress and is relieved by stress. REPRODUCIBLE.
- due to atherosclerotic narrowing
Unstable:
- new onset pain or pain at rest
- accelerating pattern of pain
- pain post MI or post-procedure
- due to acute plaque event (plaque rupture, acute thrombus formation, partially occludes vessel)
STEMI vs non-STEMI
STEMI: Criteria for MI + ST elevation or new BBB
NON-STEMI: Criteria for MI WITHOUT ST elevation or new BBB
WHO Criteria for MI
2 of the following:
- Classic SX of MI
- Elevated troponin, CK
- Typical ECG pattern (ST segment changes, T wave changes, new BBB, development of Q waves)
What conditions does ACS encompass and what is the underlying pathophys?
Acute plaque event (plaque rupture)
Unstable angina (ruptured plaque partially occludes coronary artery)
NSTEMI + STEMI (ruptured plaque completely occludes coronary artery)