Riggs T, Hirschfeld S, Fanaroff A, Liebman J, Fletcher B, Meyer R
J Pediatr. 1977 Oct;91(4):626-31. doi: 10.1016/s0022-3476(77)80521-0.
Serial echocardiograms were performed on 17 infants with persistence of fetal circulation syndrome to measure right ventricular systolic time intervals from pulmonic valve echograms and left ventricular systolic time intervals from aortic valve echograms. Right ventricular pre-ejection period/right ventricular ejection time ratio was prolonged in PFCS when compared to that in normal newborn infants, and diminished with clinical improvement. Left ventricular pre-ejection period/left ventricular ejection time ratio was prolonged in infants with PFCS. Echographic RPEP/RVET was consistent with the elevated pulmonary artery pressure and pulmonary vascular resistance of PFCS; elevated LPEP/LVET suggested left ventricular dysfunction.
对17例患有持续性胎儿循环综合征的婴儿进行了系列超声心动图检查，以测量肺动脉瓣超声心动图的右心室收缩时间间期和主动脉瓣超声心动图的左心室收缩时间间期。与正常新生儿相比，持续性胎儿循环综合征患儿的右心室射血前期/右心室射血时间比值延长，并随临床症状改善而降低。持续性胎儿循环综合征患儿的左心室射血前期/左心室射血时间比值延长。超声心动图测得的右心室射血前期/右心室射血时间比值与持续性胎儿循环综合征的肺动脉压升高及肺血管阻力升高相符；左心室射血前期/左心室射血时间比值升高提示左心室功能障碍。
