results when prolonged to some extent, the long pr interval will induce diastolic mitral regurgitation, the critical interval is 0.27s in the model patient.
结果pr延长达一定程度将引起二尖瓣舒张期返流,本例患者pr间期临界宽度为0.27s ;
in a certain rang, the longer the pr interval, the longer the duration of the diastolic mitral regurgitation;