High Yield Flashcards
Causes of a motor peripheral neuropathy
- Diabetes
- Multifocal motor neuropathy
- Charcot Marie tooth
- Spinal muscular atrophy
- Motor neuron disease
- CIDP (motor predom form)
Causes of a sensory peripheral neuropathy
- Diabetes*
- Alcohol*
- Infiltrative (amyloid)*
- Vasculitis *
- Medications*: amiodarone, cisplatin, izoniazid
- Paraprotein (MGUS)
- Sjogren’s
- B12 deficiency
- Syphilis
- = painful
Aortic stenosis signs of severity
- Plateau pulse
- Aortic thrill
- Late peaking murmur
- S4
- LVF
Aortic stenosis indications for surgery
Severe = valve area <1cm2, gradient >40mmHg
- severe plus symptoms
- severe plus LV dysfunction
Mitral regurgitation signs of severity
- LV dilation, displaced apex bear
- Small volume pulse (very severe)
- soft s1
- early A2
- S3
- LVF
- Pulmonary HT
Mitral regurgitation indications for surgery
- Acute MR
- NHYA III/IV sx
- LV dysfunction but EF >30%
HOCM signs of severity
ECG: LVH, lateral ST and T wave changes, deep Q waves
TTE: asymmetrical hypertrophy with septal hypertrophy and systolic anterior motion of the mitral valve.
Aortic stenosis aeitiology
- Degenerative
- Bicuspid aortic valve
- Rheumatic
Mitral stenosis causes
- Rheumatic
- Severe mitral annular calcification (rare assoc hypercalcaemia and hyperPTH)
- After mitral valve repair
- Congenital
Mitral stenosis signs of severity
- Small pulse pressure
- Soft S1
- Early opening snap (due to raised LA pressure)
- Length of the mid-diastolic rumbling murmur
- Diastolic thrill at apex
- Pulmonary HT
Mitral regurgitation: causes
CHRONIC
- Degenerative disease
- Mitral valve prolapse
- Rheumatic
- Papillary muscle dysfunction (LVF, ischaemia)
- CTD: RA, AS
- Congenital (e.g. endocardial cushion defect)
ACUTE
- IE (e.g. perforation of anterior leaflet)
- MI (chorae rupture or papillary muscle dysfunction)
- Trauma
- Surgical
Aortic regurgitation: signs of severity
- Collapsing pulse
- Wide pulse pressure (>80mmHg)
- Length of the decrescendo diastolic murmur
- Third heart sound
- Soft A2
- LVF
- Austin flint murmur (diastolic rumble due to regurgitant jet limiting mitral inflow)
Aortic regurgitation: causes
- Rheumatic valvular disease
- Congenital (biscuspid valve)
- Seronegative arthropathy (AS)
- Aortic root disease
- Marfan’s
- Aortitis (e.g. AS, RA, tertiary syphilis)
- Dissecting aneurysm
- IE
Tricuspid regurgitation: CFx
- V waves in JVP
- RV heave
- Pansystolic murmur (maximal LSE and on inspiration)
- Pulsatile liver
Tricuspid regurgitation: causes
- Functional (RVF)
- Rheumatic
- IE
- Congenital (Ebstein’s anomaly)
- Tricuspid valve prolapse
- Right ventricular papillary muscle infarction
- Trauma
- Ventricular pacemaker can lead to decoupling of leaflet
HOCM clinical features
AUSC: Ejection systolic murmur loudest at LSE which increases with release of valsalva manouvre
PULSE: sharp, rising and jerky. Rapid ejection by the hypertrophied ventricle early in systole is followed by obstruction caused by the displacement of the mitral valve into the outflow tract.
JVP: prominent a wave (due to forceful atrial contraction against a non-compliant right ventricle)
PALP: double or triple apical impulse (due to presystolic expansion of the ventricle caused by atrial contraction)
Dynamic manoeuvre: outflow murmur is INCREASED by the valsalva manoeuvre, standing, isometric exercise. DECREASED by squatting.
ECG: LVH, lateral ST and T wave changes, deep Q waves
HOCM causes
- Autosomal dominant with variable expressivity: sarcomeric heavy chain
- Idiopathic
- Friedreich’s ataxia
ASD CFx
- RV enlargement (or normal)
- Fixed splitting S2
- ES murmur in pulmonary area
- LV impulse palpable
Pulmonary stenosis CFx
- Peripheral cyanosis due to low CO
- JVP A waves due to RA hypertrophy
- RV heave
- Thrill over pulmonary area
- Harsh ejection systolic murmur max in pulmonary area (increased on inspiration)
Pulmonary stenosis: signs of severity
- Ejection systolic murmur peaking late in systole
- Absence of an ejection click
- Presence of S4
- Signs of RV failure
Pulmonary stenosis causes
- Congenital
- Carcinoid syndrome
Mitral stenosis CFx
GENERAL: tachypnoea, mitral facies, peripheral cyanosis (if severe)
PULSE: normal or reduced in volume (due to reduced CO), AF (secondary LA enlargement)
JVP: prominent a wave (if pulm HT), loss of a wave (if AF)
PALPATION: tapping apex beat (palpable S1), RV heave and palpable P2 (if pulm HT present), diastolic thrill (rare)
ASCULTATATION: loud S1 (valve cusps wide at systole), diastolic decrescendo murmur at mitral area
Mitral regurg CFx
SYMPTOMS: dyspnoea (increased LA pressure), fatigue (decreased CO).
GENERAL SIGNS: tachypnoea
PULSE: normal or sharp upstroke due to rapid LV decompression, AF common
PALPATION: apex beat displaced, diffuse and hyperdynamic, pansystolic thril is occ present at the apex, parastenal impulse (LA enlargement behind RV)
ASCULTATION: soft or absent S1 (by end of diastole, LA and LV pressures have equalised and valve cusps drifted back together), LV S3 (due to rapid LV filling in early diastole), pansystolic murmur max at apex usually radiating to axilla
MVP CFx
Systolic click or clicks at a variable time (usually midsystolic)
High pitched late systolic murmur, commencing with the click and extending throughout the rest of systole