A mechanism controlling the characteristics of T-wave alternans measurements in the setting of myocardial ischemia

被引：2

作者：

Feldman, AB ^{[1
]}

Esperer, HD ^{[1
]}

Cohen, RJ ^{[1
]}

机构：

[1] Harvard Univ, MIT, Div HST, Cambridge, MA 02139 USA

来源：

COMPUTERS IN CARDIOLOGY 1999, VOL 26 | 1999年 / 26卷

关键词：

D O I：

10.1109/CIC.1999.825928

中图分类号：

R5 [内科学];

学科分类号：

1002 ; 100201 ;

摘要：

T-Wave alternans (TWA) is a variation in the morphology of the T wave of the electrocardiogram (ECG) that repeats on an every other beat basis. In recent clinical studies, its presence has shown to be highly predictive of the occurrence of lethal ventricular arrhythmias. Measurements of TWA using power spectral analysis of the ECG signals have shown that the power at the alternans frequency (0.5 cycles per bear) increases with heart rate following onset at a patient-specific heart rare threshold. The mechanisms underlying these phenomena have not been fully established. In this paper, we report a mechanism that can account for these two phenomena in the setting of myocardial ischemia.

引用

页码：149 / 152

页数：4

共 9 条

[1] T wave alternans during exercise and atrial pacing in humans [J].