Question

which features are the most accurate descriptions of the murmur of mitral regurgitation?
located at the apex of the heart, heard during systole, the intensity of the murmur predicts the extent of valvular disease
located usually at the right upper sternal border, heard during systole, may radiate to the right carotid area
located anywhere in the chest, heard during systole, the intensity of murmur correlates with the degree of valvular disease
located at the apex of the heart, heard during diastole, may radiate to the right carotid area
located at the left lower sternal border, heard during diastole, the intensity of murmur does not correlate with the degree of stenosis

Explanation:

Mitral regurgitation murmur is typically heard at the apex of the heart during systole, and its intensity can predict the extent of valvular disease. The other locations (right upper sternal border, anywhere in the chest, left lower sternal border) and phases (diastole) are incorrect for typical mitral regurgitation murmur descriptions.

Answer:

Located at the apex of the heart, heard during systole, the intensity of the murmur predicts the extent of valvular disease