Right ventricular systolic function as a predictor of appropriate ICD therapy

Area of Science:

• Cardiology
• Electrophysiology
• Echocardiography

Background:

• Right ventricular dysfunction is a known risk factor for sudden cardiac death.
• Understanding predictors of appropriate implantable cardioverter-defibrillator (ICD) therapy is crucial for patient management.

Purpose of the Study:

• To evaluate the association between right ventricular fractional area change (RVFAC) and appropriate ICD therapy.
• To determine a specific cutoff value for RVFAC that predicts ICD therapy.

Main Methods:

• Retrospective analysis of consecutive patients undergoing initial ICD implantation.
• Exclusion of patients with specific cardiomyopathies (hypertrophic, Brugada, long QT).
• Measurement of right ventricular dimensions and function using transthoracic echocardiography.

Main Results:

• A low RVFAC (cutoff value of 34.8%) was identified as an independent predictor of appropriate ICD therapy (HR: 3.40).
• Patients with RVFAC < 34.8% had a significantly higher incidence of appropriate ICD therapy.
• RVFAC normalization during follow-up was associated with a lower incidence of appropriate ICD therapy.

Conclusions:

• A reduced RVFAC is associated with an increased likelihood of receiving appropriate ICD therapy.
• RVFAC serves as a valuable parameter for risk stratification in patients receiving ICDs.