<prompt> All of the following murmurs may be heard in patients with aoic reugurgitation except -High-pitched decrescendo diastolic murmurSoft, low pitched middiastolic rumbling murmurMid-systolic ejection flow murmurPresystolic murmur  <response>: S 1 is generally absent, soft, or buried in the holosystolic murmur of chronic MR. A low-pitched S 3 occurring 0.12-0.17 s after the aoic valve closure sound,It may be followed by a sho, rumbling, mid-diastolic murmur, even in the absence of structural MS. A presystolic murmur is not ordinarily heard with isolated MR. A systolic murmur of at least grade IIIVI intensity is the most characteristic auscultatory finding in chronic severe MR. It is usually holosystolic, but as previously noted it is decrescendo and ceases in mid- to late systole in patients with acute severe MR. Harrison;s principle of internal medicine,18th edition,pg no. 1935 