Past, present, and future of CRT

Area of Science:

• Cardiology
• Biomedical Engineering

Background:

• Cardiac resynchronization therapy (CRT) is a vital treatment for drug-refractory heart failure with reduced ejection fraction and ventricular conduction delay.
• Optimizing patient selection for CRT is crucial, as not all eligible patients benefit from conventional criteria.

Observation:

• Emerging echocardiographic parameters, including myocardial strain, are being investigated to enhance CRT response prediction.
• Large randomized controlled trials (RCTs) indicate that even mildly symptomatic heart failure patients may benefit from CRT.
• The efficacy of CRT in heart failure patients with narrow QRS complexes requires further investigation through larger RCTs.

Findings:

• Experimental data from animal models are clarifying the complex pathophysiology of cardiac dyssynchrony.
• Technological innovations, such as wireless endocardial pacing, are anticipated to enable more precise and effective CRT delivery.

Implications:

• Improved patient selection strategies for CRT are needed to maximize therapeutic benefits.
• Advancements in imaging and pacing technology are expected to refine CRT application and improve patient outcomes in heart failure management.