What type of murmur is associated with mitral regurgitation?

A systolic murmur that radiates to the axilla is indeed characteristic of mitral regurgitation. This type of murmur occurs during the heart's contraction phase (systole) when the left ventricle pumps blood into the aorta. In mitral regurgitation, the mitral valve does not close properly, allowing some of the blood to flow back into the left atrium. This backflow creates turbulence in the blood flow, which is then heard as a murmur.

The quality and location of the murmur help identify the condition; specifically, the sound is typically described as a high-pitched, holosystolic or pansystolic murmur best heard at the apex of the heart and may radiate to the left axilla. This radiating pattern occurs due to the anatomical alignment of the heart structures and the direction of blood flow during regurgitation.

Other types of murmurs listed, such as diastolic murmurs, relate to different conditions affecting the heart, typically not associated with mitral regurgitation. The diastolic murmur heard at the neck describes conditions such as aortic regurgitation, while other murmurs noted for the left sternal border usually refer to different types