Update on Cardiac Resynchronisation Therapy for Heart Failure

Area of Science:

• Cardiology
• Medical Devices
• Heart Failure Management

Background:

• Cardiac resynchronisation therapy (CRT) is established for symptomatic systolic heart failure with interventricular conduction delay.
• Patient selection has evolved, expanding indications to include mild heart failure and specific cases requiring frequent right ventricular pacing.
• CRT effectiveness in atrial fibrillation is linked to near-complete pacing, often necessitating atrioventricular (AV) junction ablation.

Purpose of the Study:

• To review recent advancements and current best practices in cardiac resynchronisation therapy.
• To highlight strategies for optimizing CRT outcomes and patient selection.
• To clarify the role of AV delay optimization in CRT.

Main Methods:

• Review of large clinical trials and recent advances in CRT.
• Analysis of patient subgroups benefiting from CRT, including those with mild heart failure and atrial fibrillation.
• Evaluation of lead placement strategies and AV delay optimization techniques.

Main Results:

• CRT is beneficial for patients with left ventricular systolic dysfunction and conduction delays.
• Expanded indications for CRT now include patients with mild heart failure and mildly reduced ejection fraction requiring right ventricular pacing.
• Optimizing left ventricular (LV) lead placement is crucial for maximizing CRT response.
• Routine AV delay optimization is not recommended based on multicenter trial results.

Conclusions:

• CRT remains a vital therapy for specific heart failure populations.
• Ongoing research focuses on refining patient selection and lead placement for improved CRT efficacy.
• Current evidence suggests against routine AV delay optimization in CRT management.