Singh G K, Shumway J B, Amon E, Marino C J, Nouri S, Winn H N
Division of Pediatric Cardiology and Maternal-Fetal Medicine, Saint Louis University School of Medicine, Missouri 63104, USA.
Am J Perinatol. 1998;15(12):661-8. doi: 10.1055/s-2007-999299.
Persistent bradycardia is an uncommon cardiac problem in fetuses but carries a high mortality in those with a ventricular rate <55 bpm. Fetal heart block is one of the most common causes of persistent fetal bradycardia (PFB). An optimal method for assessing and monitoring cardiovascular compensation in the setting of PFB due to heart block has not been fully established. We report the application of two-dimensional and Doppler echocardiography in close monitoring of cardiac function and hemodynamics in a third-trimester fetus with a ventricular rate <55 bpm due to heart block, which assisted in successful management of the pregnancy to term. Hemodynamic and cardiac adaptive changes in compromised fetuses, particularly due to heart block, are discussed.
持续性心动过缓在胎儿中是一种不常见的心脏问题，但心室率<55次/分钟的胎儿死亡率很高。胎儿心脏传导阻滞是持续性胎儿心动过缓（PFB）最常见的原因之一。在因心脏传导阻滞导致的PFB情况下，评估和监测心血管代偿的最佳方法尚未完全确立。我们报告了二维和多普勒超声心动图在密切监测一名因心脏传导阻滞导致心室率<55次/分钟的孕晚期胎儿心脏功能和血流动力学方面的应用，这有助于成功将妊娠维持至足月。本文还讨论了受损胎儿，特别是因心脏传导阻滞导致的血流动力学和心脏适应性变化。
