cadenced

The plagal cadence, sometimes known as the Amen cadence from ecclesiastical use, is the progression from the chord of the subdominant to the tonic, IV - I.

变格终止，有时被称为源于教会“阿们终止”，指从下属和弦到主和弦进行，IV–I。

S4.The fourth heart sound (S4, atrial gallop, presystolic gallop) is also the result of altered ventricular compliance.Its cadence has been likened to the soft a of appendix.

S4第四，又叫房性奔马律，收缩期前奔马律，室顺应性改变结果。