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心房音(又称第四心音或S_4)早在1838年由Charcelay氏首次发现,接着1880年Potain氏作了更清楚的描述。近30年来对心房音的产生机制及临床意义积累了许多资料。本文就心房音的若干问题综述如下。一、心房音的产生机制在心室舒张期中有二个快速充盈时相:一是舒张早期因心室舒张、压力下降所致的被动性心室充盈;一是舒张晚期心房收缩所产生的主动性心室充盈。第三心音(S_3)和第四心音
Atrial tone (also known as the fourth heart sound or S_4) was first discovered by Charcelay in 1838, followed by a more explicit description of Potain in 1880. In the past 30 years, atrial sound production mechanism and clinical significance has accumulated a lot of information. This article on the aura of a number of issues are summarized below. First, the mechanism of atrial fibrillation in ventricular diastolic in two rapid filling phase: First, early diastolic ventricular diastolic, decreased pressure caused by passive ventricular filling; First, the relaxation of atrial contraction caused by active ventricular filling . Third heart sound (S_3) and fourth heart sound