Lechner W, Knapp E, Hammerle P, Brabec W, Regele M, Dapunt O
Arch Gynakol. 1978 Oct 18;225(4):339-46. doi: 10.1007/BF02570576.
30 gravid women between the ages of 18 and 38 years who had gone into premature labour of unknown etiology were examined with respect to cardiac output and various other cardiovascular parameters in the standing, supine and left lateral positions. Measurements were carried out using an impedance-cardiography. A group of 30 women of similar age and duration of pregnancy but not in premature labour was also tested as controls. In the standing position, the test group showed a cardiac output which was 15% less than that of the controls. Statistically this was highly significant (p less than 0.005). No difference was found in the supine and left lateral positions. These results are in agreement with the literature, but with the method used in this study, an invasive, or X-Ray procedure is avoided. The physiology of the cardiovascular system in pregnancy and the means by which premature labour may be prevented, are discussed.
对30名年龄在18至38岁之间、病因不明而发生早产的孕妇，在站立位、仰卧位和左侧卧位时进行心输出量及其他各种心血管参数的检查。采用阻抗心动描记法进行测量。还测试了一组年龄和孕期相似但未早产的30名妇女作为对照。在站立位时，试验组的心输出量比对照组低15%。从统计学上看，这具有高度显著性（p小于0.005）。在仰卧位和左侧卧位未发现差异。这些结果与文献一致，但采用本研究中使用的方法，可以避免侵入性或X射线检查程序。文中讨论了孕期心血管系统的生理学以及预防早产的方法。
