Tricuspid stenosis is very rare and is discussed further in the valvular heart disease section ... murmur usually heard best at the third intercostal space on the left (Erb's point) at end ...

On auscultation, the typical murmur of aortic regurgitation is a soft, high-pitched, early diastolic decrescendo murmur heard best at the 3rd intercostal ... A fourth heart sound develops when ...