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 ?
The T-wave alternans was detected in simulated ECG signals.
Among these 177 patients, 68% had a positive or indeterminate T-wave alternans exercise test, while 32% had a QRS duration greater than 120 milliseconds.
Two multicenter trials are under way to further evaluate the utility of microvolt T-wave alternans technology.
About the Cambridge Heart Microvolt T-Wave Alternans Test
Broader use of T-wave alternans testing might combat both those obstacles by giving doctors and patients additional information, Bigger says.
Clinical studies in patients with heart failure are very promising, because it was revealed that T-wave alternans is a good predictor of ventricular arrhythmias.
Microvolt T-wave Alternans (TWA) is a very subtle, virtually invisible, beat-to-beat fluctuation of the T-wave (ventricular repolarization) amplitude on an ECG.
Cambridge Heart holds exclusive license to six United States patents (and corresponding foreign patents) developed at Harvard Medical School and the Massachusetts Institute of Technology and has filed additional patents for its' T-wave alternans and high-resolution electrode technology.
OTCBB: CAMH), a developer of non-invasive diagnostic tests for cardiac disease, today announced that new data presented at the Heart Rhythm Society's 32nd Annual Scientific Sessions in San Francisco confirm the diagnostic value of Microvolt T-wave Alternans (MTWA) testing in identifying patients at risk of sudden cardiac arrest (SCA).
The Company's CH 2000 stress test system is the only commercial system with FDA 510(K) clearance to measure microvolt levels of T-wave alternans as well as perform standard stress tests.
OTCBB-CAMH), today announced that Blue Cross Blue Shield (BCBS) of Arizona, the largest private insurer in Arizona, has made Microvolt T-Wave Alternans (MTWA) testing a covered benefit for people at risk of sudden cardiac death (SCD).
Clinical Study Update - Several clinical papers recently became available in draft form addressing Microvolt T-Wave Alternans (MTWA) technology as a predictor of arrhythmic events and a means of stratifying a patient's risk of sudden cardiac death.