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T-wave alternans and sudden cardiac death

Ayman El-Menyar1, Nidal Asaad

  • 1Department of Cardiology and Cardiovascular Surgery, Hamad General Hospital, Doha, Qatar. aymanco65@yahoo.com

Critical Pathways in Cardiology
|May 7, 2008
PubMed

Insights

Microvolt T-wave alternans (MTWA) can predict sudden cardiac death (SCD) risk in patients with heart disease. Further research into MTWA readings may improve its prognostic value for preventing fatal arrhythmias.

Area of Science:

  • Cardiology
  • Electrophysiology
  • Preventive Medicine

Background:

  • Sudden cardiac death (SCD) is a primary cause of mortality in ischemic heart disease patients.
  • Ventricular tachyarrhythmias cause most SCD cases, often without prior symptoms.
  • Accurate risk stratification is crucial for guiding preventive therapies against SCD.

Purpose of the Study:

  • To evaluate the prognostic significance of microvolt T-wave alternans (MTWA) for predicting SCD risk.
  • To review existing literature on MTWA's predictive capabilities in at-risk populations.

Main Methods:

  • Systematic review of published articles from Medline, Scopus, and EBSCO Host databases.
  • Analysis of studies investigating the association between MTWA and mortality outcomes.

Main Results:

  • MTWA is a strong, independent predictor of both all-cause and arrhythmic mortality.
  • The predictive accuracy of MTWA in cardiomyopathy varies across different patient populations.
  • Combining MTWA with other indices or using serial measurements may enhance its prognostic utility.

Conclusions:

  • MTWA holds significant prognostic value for identifying patients at risk of SCD.
  • Refining MTWA measurement and interpretation could broaden its clinical application in risk assessment.
  • Further investigation into optimizing MTWA assessment is warranted for improved SCD prevention strategies.

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