What type of murmur is most likely indicated when a high pitched, blowing murmur is heard at S2 while the patient leans forward?

A high-pitched, blowing murmur that is accentuated when the patient leans forward is characteristic of aortic regurgitation. This position helps to bring the left ventricular outflow tract closer to the stethoscope, thereby enhancing the sound of the murmur. Aortic regurgitation occurs due to the backward flow of blood from the aorta into the left ventricle during diastole. The quality of the murmur is typically described as blowing and high-pitched, particularly after S2, and it is often best heard along the left sternal border, especially with the patient in the forward-leaning position. This maneuver increases venous return and can enhance the intensity of the murmur, making it more pronounced.

In contrast, other types of murmurs have distinct characteristics and conditions under which they are best heard. Mitral stenosis typically produces a low-pitched, rumbling sound best heard in the left lateral decubitus position, while aortic stenosis is characterized by a medium to low-pitched crescendo-decrescendo pattern, best appreciated when the patient is sitting and leaning forward but does not match the high-pitched description of aortic regurgitation. Mitral regurgitation also leads to a hol