Question

which of the following is the most accurate description of the murmur of aortic stenosis?
it is heard during systole, and the intensity of the murmur correlates with the degree of stenosis.
it is usually heard during diastole, and the intensity of the murmur does not correlate with the degree of stenosis.
it is usually heard at the left lower sternal border during diastole and may radiate to the apex.
it is heard anywhere in the chest during diastole.
it is usually heard at the right upper sternal border but also can be heard across the precordium during systole.

Explanation:

Aortic stenosis murmur is a systolic murmur. It is typically best heard at the right upper sternal border and can be heard across the precordium. The intensity of the murmur often correlates with the degree of stenosis. Diastolic murmurs are not characteristic of aortic stenosis.

Answer:

It is heard during systole, and the intensity of the murmur correlates with the degree of stenosis.