T-wave alternans: reviewing the clinical performance, understanding limitations, characterizing methodologies.

Area of Science:

• Cardiology
• Biomedical Engineering

Background:

• Sudden cardiac death (SCD) risk stratification is an ongoing challenge.
• Current models struggle to explain the dynamic nature of acute cardiovascular events.
• Cardiac electrical instability is a potential mechanism for SCD.

Purpose of the Study:

• To review the role of T-wave alternans (TWA) in cardiac risk stratification.
• To highlight the heterogeneous prognostic performance of TWA.
• To identify knowledge gaps and suggest future research directions for TWA evaluation.

Main Methods:

• Review of existing literature on T-wave alternans (TWA) and cardiac risk.
• Analysis of factors influencing TWA measurement and interpretation.
• Discussion of technological aspects of TWA evaluation.

Main Results:

• T-wave alternans (TWA) shows variable prognostic value across different clinical populations and protocols.
• The technical features of TWA evaluation technologies require further exploration.
• TWA is influenced by factors beyond medication, necessitating careful consideration in clinical practice.

Conclusions:

• T-wave alternans (TWA) holds potential for cardiac risk stratification but requires standardized evaluation.
• Further research is needed to optimize TWA measurement and application.
• Understanding factors influencing TWA is crucial for accurate risk assessment in sudden cardiac death (SCD).