The best direct evidence of
aortic valve stenosis that your doctor can find during
a physical exam is a heart murmur, which is the sound of turbulent blood flow
across a narrowed aortic valve. Think about the flow of water when you turn on
a water faucet and block the opening with your finger: The water tends to spray
roughly because of the high pressure pushing through the narrow faucet
opening.
Your doctor will suspect aortic valve stenosis upon hearing a murmur
during systole, which is when the left ventricle contracts and pumps blood
through the aorta. If aortic valve stenosis is causing the murmur, your doctor
will be able to hear it most clearly in the area of the aorta, which is in the
upper right part of the chest near the breastbone. The sound of the murmur will
also appear to move upwards toward your neck, the sound rising to a peak and
then declining at the same rate.