29. How can the murmur of aortic stenosis be distinguished from that of hypertrophic obstructive cardiomyopathy (HOCM) in patients with atrial fibrillation or frequent ectopic beats?

A. The aortic stenosis murmur gets softer after a premature ventricular contraction while HOCM gets louder

B. There is no change in the murmur of HOCM after a longer cardiac cycle while the murmur of aortic stenosis will become louder

C. There is no change in the murmur of aortic stenosis after a longer cardiac cycle while the murmur of HOCM becomes louder

D. The aortic stenosis murmur becomes louder and HOCM becomes softer after a longer cardiac cycle
 

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