Posted by season from IP 172.199.94.131 on February 28, 2006 at 09:47:30:
A high school basketball player passes out in the middle of a
game. He is rushed to the emergency room, where he regains consciousness.
He claims that just before he fainted, he had difficulty breathing and
experienced palpitations. On physical exam, he has a bifid apical impulse
and a coarse systolic murmur at the left sternal border. The echocardiogram
reveals ventricular hypertrophy with asymmetric septal thickening. Which
of the following would increase the intensity of his heart murmur?
A. Elevating his legs
B. Increasing sympathetic tone
C. Performing the Valsalva maneuver
D. Squatting