What are the two variations of diastolic murmurs?

What are the two variations of diastolic murmurs?

• A. Aortic regurgitation and Mitral stenosis
• B. Aortic stenosis and Tricuspid regurgitation
• C. Pulmonary stenosis and Aortic regurgitation
• D. Mitral valve prolapse and Tricuspid stenosis

Answer: (A)

Diastolic murmurs occur when the heart is in the relaxation phase, between S2 and the next P2, and they come in two main patterns: regurgitant murmurs from a semilunar valve and stenotic murmurs from an atrioventricular valve. Aortic regurgitation is a regurgitant diastolic murmur, heard as a blowing, decrescendo sound best along the left sternal border, reflecting blood flowing backward from the aorta into the left ventricle. Mitral stenosis is a stenotic diastolic murmur, a low-pitched rumble often with an opening snap, reflecting restricted flow from the left atrium to the left ventricle. Thus, the pair that represents these two diastolic murmur variations is aortic regurgitation (regurgitant) and mitral stenosis (stenotic). The other options mix systolic conditions (like aortic stenosis and pulmonary stenosis) or include a predominantly systolic murmur (mitral valve prolapse) or a less typical diastolic lesion, so they don’t illustrate the two common diastolic murmur patterns.

Diastolic murmurs occur when the heart is in the relaxation phase, between S2 and the next P2, and they come in two main patterns: regurgitant murmurs from a semilunar valve and stenotic murmurs from an atrioventricular valve. Aortic regurgitation is a regurgitant diastolic murmur, heard as a blowing, decrescendo sound best along the left sternal border, reflecting blood flowing backward from the aorta into the left ventricle. Mitral stenosis is a stenotic diastolic murmur, a low-pitched rumble often with an opening snap, reflecting restricted flow from the left atrium to the left ventricle.

Thus, the pair that represents these two diastolic murmur variations is aortic regurgitation (regurgitant) and mitral stenosis (stenotic). The other options mix systolic conditions (like aortic stenosis and pulmonary stenosis) or include a predominantly systolic murmur (mitral valve prolapse) or a less typical diastolic lesion, so they don’t illustrate the two common diastolic murmur patterns.