The presence of an S4 implies effective atrialcontraction; it is never heard in atrial fibrillation.
S4的出现意味着心房收缩好,房性纤颤病人无S4。
2
Results: Electromechanical delay time was longer in left atrium. Atrialcontraction time and PR interval were longer in right side.
结果:左心房的电-机械延迟时间较长,右侧的心房收缩时间和心室的电-机械延迟时间较长。
3
During atrial fibrillation, uncoordinated electrical activity leads to ineffective atrialcontraction, reduced atrial filling time, and decreasing cardiac output.