In cardiology, an<unk>  is a low-pitched, mid to late diastolic rumbling murmur which is best heard at the cardiac apex.  It is associated with severe aortic regurgitation.
Austin Flint murmur
Still's murmur
Muffled heart sounds
Continuous murmur
Graham-Steell murmur
Functional murmur
Dock's murmur
Systolic heart murmur