T-wave alternans


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T-wave alternans

A repolarisation phenomenon manifesting as a microvolt beat-to-beat change in the amplitude of the T wave and ST segment on EKGs.  T-wave alternans has low specificity as a predictor of arrhythmic risk in unselected populations with prior myocardial infarction.

T-wave alternans

Cardiology A subtle every-other-beat variation in T waves that is prognostic of Pts at high risk for life-threatening cardiac arrhythmias and sudden cardiac death. See Alternans test.
References in periodicals archive ?
Ambulatory ECG-based T-wave alternans and heart rate turbulence can predict cardiac mortality in patients with myocardial infarction with or without diabetes mellitus.
T-wave alternans (TWA) is a non-invasive marker of the vulnerability to ventricular arrhythmia (1).
Now, doctors have completed the first systematic test of using T-wave alternans for making decisions about implanting defibrillators.
would have tremendous implications for the cost-benefit ratio of this form of treatment," noted the cardiologist at a session on T-wave alternans testing.
Tests to identify a subset of patients who may not actually need or profit from a device--that would have tremendous implications for the cost-benefit ratio of this form of treatment," noted the cardiologist, who cochaired a session on T-wave alternans testing.
Studies show that heart patients with this electrical change, called T-wave alternans, face a much greater risk of arrhythmia and SCD than do those without the underlying disorder.
The results of this study further demonstrate the predictive power of our Microvolt T-Wave Alternans technology" said David Chazanovitz, president andCEO of Cambridge Heart, "We would anticipate that both physicians and payers would view these study results as a demonstration of the important role MTWA testing can play in both increasing the effectiveness of ICD therapy and controlling costs.
Such a propensity to develop T-wave alternans is considered a harbinger of the problem that defibrillators protect against.
The Company's products incorporate proprietary Microvolt T-Wave Alternans measurement technologies, including the patented Analytic Spectral Method([R]) and ultrasensitive disposable electrode sensors.
Considering all of the above, the microscopic T-wave alternans (MTWA) seems to be a good criterion for conducting risk stratification analysis.
UnitedHealthcare Covers Microvolt T-Wave Alternans Testing