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.
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Ambulatory ECG-based T-wave alternans and heart rate turbulence can predict cardiac mortality in patients with myocardial infarction with or without diabetes mellitus.
COMPARISON OF T WAVE ALTERNANS IN PATIENTS WITH CARDIOMYOPATHY AND HEALTHY CONTROLS
T-wave alternans (TWA) is a non-invasive marker of the vulnerability to ventricular arrhythmia (1).
Evaluation of the T-wave alternans detection methods: a simulation study
Now, doctors have completed the first systematic test of using T-wave alternans for making decisions about implanting defibrillators.
Test identifies people at cardiac risk
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.
Benefit from ICD may be best predicted by T-wave alternans
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.
T-wave alternans may predict benefit from ICD therapy; ISO: a better risk stratifier
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.
Do you need defibrillator therapy?
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.
MTWA TESTING CAN DETERMINE WHO SHOULD RECEIVE ICD
who can benefit from annual Microvolt T-Wave Alternans (MTWA) testing.
Prognostic Value of Cambridge Heart's MTWA Test Featured in Case of the Week in Diagnostic and Interventional Cardiology
Such a propensity to develop T-wave alternans is considered a harbinger of the problem that defibrillators protect against.
Calling death's bluff: implantable defibrillators can save thousands of lives--but which ones?
The Company's products incorporate proprietary Microvolt T-Wave Alternans measurement technologies, including the patented Analytic Spectral Method([R]) and ultrasensitive disposable electrode sensors.
Cambridge Heart Expands Distribution into Latin America
Considering all of the above, the microscopic T-wave alternans (MTWA) seems to be a good criterion for conducting risk stratification analysis.
Utility of T-wave alternans in congestive heart failure
UnitedHealthcare Covers Microvolt T-Wave Alternans Testing
Cambridge Heart Provides Reimbursement Update

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