| 单词 |
signal-averaged electrocardiography |
| 释义 |
signal-averaged electrocardiography signal-averaged electrocardiography A technique that amplifies late potentials (high-frequency, low-amplitude signals at the end of a QRS complex), which are attributed to fragmented and delayed conduction through the borders of a myocardial scar.
The delayed conduction of late potentials allows re-entry of electrical impulses and increased susceptibility to ventricular arrhythmias; detection of late potentials by signal-averaged electrocardiography correlates well with inducibility of ventricular tachycardia (VT). It is a useful, noninvasive test for identifying increased risk of VT, but is of little use in patients with conduction defects |
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