Cellina G, Binaghi P, Limonta A, Locicero G, Montanari C, Brina A
G Ital Cardiol. 1981;11(1):63-7.
During pregnancy and the post partum period important cardiovascular adjustments take place, which for ethical views need a non invasive approach. In the present work we studied the alterations of the Systolic Time Intervals in both supine and lateral decubitus during each trimester and at the fifth day and fifth week after delivery. In the first part of pregnancy a significant reduction of the preejection time (PE) and PE/EVS with an increase of the left ventricular ejection time (EVS) become evident. In the second part the picture reverses to a significantly reduced EVS and increased PE and PE/EVS. This picture even if decreasing, is present in the post partum period. The first part of pregnancy is characterized by a hyperkinetic condition; in the second one the position of the woman becomes important, and the reduction of the EVS is at least partially due to an impaired venous return (compression of the vena cava by the gravid uterus). The persistence of altered systolic time intervals in the post partum (increased PE/EVS) suggest an impaired myocardial performance.
在孕期和产后会发生重要的心血管调节变化，出于伦理考虑，这需要采用非侵入性方法。在本研究中，我们对孕期各阶段以及产后第5天和第5周时仰卧位和侧卧位的收缩期时间间期变化进行了研究。在妊娠早期，射血前期（PE）和PE/EVS显著缩短，左心室射血时间（EVS）延长。在妊娠中期，情况相反，EVS显著缩短，PE及PE/EVS延长。这种情况在产后虽有所减轻，但仍然存在。妊娠早期的特点是高动力状态；在妊娠中期，孕妇的体位变得很重要，EVS缩短至少部分是由于静脉回流受损（妊娠子宫压迫下腔静脉）。产后收缩期时间间期持续异常（PE/EVS升高）提示心肌功能受损。
