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Microvolt T-wave Alternans (MTWA) testing is a non-invasive diagnostic test that detects minute electrical variability in a portion of the electrocardiogram (EKG) known as the T-wave. The spectral analysis method and the modified moving average method are different ways to measure microvolt-t wave alternans activity.
It has been suggested that such testing may have a role in assessing risk for sudden cardiac death from ventricular dysrhythmias and in determining subsequent patient management. Currently, Medicare nationally covers only MTWA using the spectral analysis method. The requestor, GE Healthcare, is asking CMS to reconsider the NCD to broaden national coverage to include the modified moving average method.
April 23, 2014
CMS opens this reconsideration of the NCD on MTWA testing. The formal request is to add the modified moving average method of determining MTWA to NCD Manual Section 20.30. The initial 30-day public comment period begins with this posting date, and ends after 30 calendar days. CMS considers all public comments, and is particularly interested in clinical studies and other scientific information relevant to the technology under review.
Instructions on submitting comments can be found at
October 23, 2014
January 13, 2015