Halliday H, Hirschfeld S, Riggs T, Liebman J, Fanaroff A, Bormuth C
Pediatrics. 1977 Oct;60(4):444-9.
Echocardiograms were performed for 82 preterm infants comprising 22 normal infants, 29 with mild respiratory distress syndrome (RDS), and 31 with severe RDS. Left ventricular systolic time intervals were measured from aortic valve echograms and right ventricular systolic time intervals from pulmonic valve echograms. Left ventricular performance seemed to be altered early in postnatal adaptation of preterm infants, but played no demonstrable role in the outcome of RDS. The right ventricular preejection period/right ventricular ejection time (RPEP/RVET) ratio was prolonged in 17 out of 31 patients with severe RDS, consistent with increased pulmonary vascular resistance or right ventricular dysfunction. Prolonged RPEP/RVET identified a subgroup with increased mortality and morbidity.
对82名早产儿进行了超声心动图检查，其中包括22名正常婴儿、29名患有轻度呼吸窘迫综合征（RDS）的婴儿和31名患有重度RDS的婴儿。从主动脉瓣超声心动图测量左心室收缩时间间期，从肺动脉瓣超声心动图测量右心室收缩时间间期。左心室功能在早产儿出生后的适应早期似乎就发生了改变，但在RDS的预后中未发挥明显作用。31名重度RDS患者中有17名右心室射血前期/右心室射血时间（RPEP/RVET）比值延长，这与肺血管阻力增加或右心室功能障碍一致。RPEP/RVET延长确定了一个死亡率和发病率增加的亚组。
