Gabrielli F, Balzotti L, Bandiera A
Dipartimento di Scienze Cardioascolari e Respiratorie, Università La Sapienza, Roma, Italia.
Int J Cardiol. 1997 Aug 29;61(1):61-7. doi: 10.1016/s0167-5273(97)00135-6.
The aim of this study was to evaluate QT dispersion in acute and sub-acute stages of myocardial infarction and clarify the relationship between QT dispersion and myocardial viability. We studied 95 patients with acute myocardial infarction. The QT dispersion values were compared to those of a control group of 50 healthy subjects. In the patients with acute myocardial infarction dispersion of ventricular repolarization was evaluated on the standard electrocardiograms obtained at the time of admission and ten days later. Two-dimensional echocardiography examination was performed to assess and compare left ventricular wall motion at different stages. QT dispersion values were increased in patients with acute myocardial infarction and levels were higher in the early than in late phases. A better recovery of QT dispersion was found in those patients who demonstrated improvement of left ventricular contractility. The modifications of QT dispersion can reflect the alterations of myocardial contractility.
本研究的目的是评估心肌梗死急性和亚急性期的QT离散度，并阐明QT离散度与心肌存活性之间的关系。我们研究了95例急性心肌梗死患者。将QT离散度值与50名健康受试者的对照组进行比较。在急性心肌梗死患者中，在入院时和十天后获得的标准心电图上评估心室复极离散度。进行二维超声心动图检查以评估和比较不同阶段的左心室壁运动。急性心肌梗死患者的QT离散度值增加，早期水平高于晚期。在左心室收缩力改善的患者中发现QT离散度恢复得更好。QT离散度的改变可反映心肌收缩力的变化。
