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Diastolic heart murmurs are heart murmurs heard during diastole.〔(【引用サイトリンク】title=Techniques - Heart Sounds & Murmurs Exam - Physical Diagnosis Skills - University of Washington School of Medicine )〕 Diastolic murmurs start at or after S2 and end before or at S1. Many involve stenosis of the atrioventricular valves or regurgitation of the semilunar valves. ==Types== * Early diastolic murmurs start at the same time as S2 with the close of the ''semilunar'' (aortic & pulmonary) valves and typically end before S1. Common causes include aortic or pulmonary regurgitation and left anterior descending artery stenosis. * Mid-diastolic murmurs start after S2 and end before S1. They are due to turbulent flow across the ''atrioventricular'' (mitral & tricuspid) valves during the rapid filling phase from mitral or tricuspid stenosis. * Late diastolic (presystolic) murmurs start after S2 and extend up to S1 and have a crescendo configuration. They can be associated with AV valve narrowing. They include mitral stenosis, tricuspid stenosis, myxoma, and complete heart block. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Diastolic heart murmur」の詳細全文を読む スポンサード リンク
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