Murmurs Flashcards
What does the first heart sound signify
Closure of mitral and tricuspid valves
What does the second heart sound signify
Closure of aortic and pulmonary valves
What is a split S2 sound
Pulmonary valve may close just after the aortic, which is prolonged during inspiration, or in defects which cause more blood to be pumped out the RV
Cause of aortic stenosis
Calcification of aortic valves. Congenital abnormality of aortic valve. Rheumatic heart disease
Cause of mitral regurgitation
Infective endocarditis, acute MI with rupture of papillary muscles, rheumatic heart disease, congenital defects of mitral valve, cardiomyopathy
Valvular causes of aortic regurgitation
Congenital bicuspid aortic valve, rheumatic heart disease, infective endocarditis
Aortic root dilation causes, resulting in aortic regurgitation
Aortic dissection, connective tissue diseases, aortitis
Pulse features of aortic stenosis
slow rising pulse, narrow pulse pressure
S2 in aortic stenosis
Reduced or absent S2, reverse splitting of S2
Apex beat features of mitral regurgitation
Displaced, hyperdynamic
Apex beat features of aortic stenosis
Non-displaced, heaving
Pulse of aortic regurgitation
Collapsing pulse (‘water hammer pulse’ with wide pulse pressure)
Apex beat in aortic regurgitation
Displaced hyperdynamic
Causes of mitral stenosis
Rheumatic disease (most common), congenital, left atrial myxoma, connective tissue disorders and mucopolysachharideosis
Pulse pressures of mitral stenosis
Low volume pulse which may be irregularly regular (AF)
Clinical features of mitral stenosis
Loud first heart sound with tapping apex beat and malar flush
Type of murmur in aortic stenosis
Ejection systolic
When is aortic stenosis murmur heard loudest
Loudest on expiration sitting forward