Pacemakers and defibrillators for congestive heart failure

Area of Science:

• Cardiology
• Biomedical Engineering

Background:

• Medical therapy is standard for heart failure (HF).
• Pacemaker use for HF hemodynamics is under investigation.
• Sudden cardiac death (SCD) causes 50% of HF deaths.

Purpose of the Study:

• Evaluate VDD/DDD pacing for congestive heart failure (CHF).
• Investigate left-sided or biventricular pacing for CHF.
• Assess implantable cardioverter defibrillators (ICDs) for primary SCD prevention in CHF.

Main Methods:

• Controlled studies on VDD/DDD pacing.
• Ongoing randomized trials for advanced pacing.
• Active evaluation of ICDs for primary SCD prevention.

Main Results:

• VDD/DDD pacing benefits in non-selected CHF patients not verified.
• Early studies suggest favorable hemodynamic effects from left/biventricular pacing.
• ICD value for secondary SCD prevention is established.

Conclusions:

• Further controlled studies are needed for VDD/DDD pacing efficacy.
• Left/biventricular pacing shows promise for CHF hemodynamics.
• Large trials are evaluating ICDs and biventricular pacing for CHF management and SCD prevention.