Tammaro A E, Guarnera F, Piccone U, Magni M L
G Ital Cardiol. 1978;8(11):1201-5.
In the recent years an increasing attention has been focused on the systolic time intervals (STI) as reliable indicators of left ventircular contractile performance. As regards the diagnostic usefulness of STI in old persons only few papers can be found in the literature, all of them being concerned with subjects aged less than 90 years. With the aim to assess the usefulness and the reliability of the method and the caracteristics of left ventricular function in the tenth decade, STI as well as heart volume (HV) were determined on a group of 35 subjects aged 90 years and over (mean age 93.2 years) normotensive and free from clinical evidence of heart disease. STI (PEPI, LVETI, QS2I, PEP/LVET) values showed no differences with those considered as normal. A marked increase was recorded for the HV values. These results suggest that in the very advanced age a good level of left ventricular contractile performance can be mantained by the compensatory mechanism represented by heart dilation according to the Frank Starling principle.
近年来，收缩期时间间期（STI）作为左心室收缩功能的可靠指标受到了越来越多的关注。关于STI在老年人中的诊断价值，文献中仅有少数几篇论文，且所有这些论文关注的都是年龄小于90岁的受试者。为了评估该方法在九十多岁人群中的实用性、可靠性以及左心室功能特征，我们对一组35名年龄在90岁及以上（平均年龄93.2岁）的血压正常且无心脏病临床证据的受试者进行了STI以及心脏容积（HV）的测定。STI（PEPI、LVETI、QS2I、PEP/LVET）值与正常参考值无差异。HV值有显著升高。这些结果表明，在高龄阶段，根据弗兰克 - 斯塔林原理，心脏扩张所代表的代偿机制能够维持较好水平的左心室收缩功能。
