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microvolt T-wave alternans microvolt testing (MTWA)

Indications: - screening for ventricular arrhythmias - evaluation of patients at risk for sudden cardiac death from ventricular arrhythmia. i.e. does patient need ICD ? Clinical significance: - lack of T-wave alternans may identifiy patients with ischemic heart disease or non-ischemic cardiomyopathy at low risk for sudden cardiac death - presence does not identify patients at high risk (see T-wave alternans) Principle: - detection of subtle, microvolt-level T-wave alternans not visible to the human eye (see T-wave alternans) Notes: - appears to be proprietary test

Related

T-wave alternans

General

electrocardiogram (ECG, EKG)

References

  1. Centers for Medicare and Medicaid services (CMS) http://www.cms.hhs.gov/mcd/viewdecisionmemo.asp?
  2. Cambridge Heart Microvolt T-Wave Alternans http://www.cambridgeheart.com/mtwa/mtwa