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本图系上图同一患者的心电图,只是此处显示的是一个长联律间期室早(室早B)的血流动力学影响。该室早落在前窦性心律的T波之后,故室早B属于一次舒张期室早。因心脏在前次QT间期结束后已进入舒张期,心室已从原来的收缩状态变为舒张状态,使T波之后的心室舒张形成一个类似“负压回抽”作用,使左房平均压高于左室舒张压,血流则从压力高的左房向压力低的左室回流而形成快速及缓慢的
This figure is the electrocardiogram of the same patient on the graph above, except shown here for the hemodynamic effects of a syndromic interventricular premature ventricular contractility. The room early fall in the T wave before the sinus rhythm, so early B is a room early diastolic. Because the heart after the previous QT period has entered the diastolic, ventricular from the original state of contraction into a diastolic state, so that after T wave of ventricular diastolic form a similar “negative pressure pumping back ” role in the left atrium The mean pressure is higher than the left ventricular diastolic pressure, blood flow from the pressure of the left atrium to the low pressure of the left ventricular back to form a rapid and slow