Penkov N, Sirakova V, Kaponov Kh
Vutr Boles. 1988;27(3):51-7.
By analyzing the simultaneous recordings of M-type echocardiogram of the mitral valve, apexcardiogram (ACG) phonocardiogram (PCG) in 49 healthy persons, 30 patients with II stage hypertension and 39 patients with unstable angina pectoris was established that the opening of the mitral valve coincides with the moment in which the discending arm of the ACG deviates from its tangent (determined by two points--the first is the point of intersection of the ACG with the perpendicular raised from the initial highfrequency vibrations of the aortic component of the II tone: the second is 20 ms from the first on the discending arm of the ACG). The method allows the determination of the exact moment of the opening of the mitral valve and the duration of the isovolumetric relaxation and of the period of the active suction by the ACG and the PCG only. This increases the apexcardiographic potentialities in the functional diagnosis of the left ventricle.
通过分析49名健康人、30名二期高血压患者和39名不稳定型心绞痛患者的二尖瓣M型超声心动图、心尖搏动图（ACG）和心音图（PCG）的同步记录，确定二尖瓣开放与ACG下降支偏离其切线的时刻一致（由两点确定——第一点是ACG与从第二心音主动脉成分的初始高频振动引出的垂线的交点；第二点是在ACG下降支上距第一点20毫秒处）。该方法仅通过ACG和PCG就能确定二尖瓣开放的确切时刻、等容舒张期的持续时间以及主动抽吸期。这增加了心尖搏动图在左心室功能诊断中的潜力。
