Examples of microscopic T-wave alternans (TWA)

Visually inapparent microvolt-level TWA, uncovered by digital signal processing.

TWA: T-wave alternans.
* The more positive T-wave of each alternating pair.

Reproduced from: Narayan SM. T-wave alternans and the susceptibility to ventricular arrhythmias. J Am Coll Cardiol 2006; 47:269. Illustration used with the permission of Elsevier Inc. All rights reserved.

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Examples of microscopic T-wave alternans (TWA)