Cardiac resynchronization therapy: refocus on the electrical substrate

Area of Science:

• Cardiology
• Biomedical Engineering

Background:

• Cardiac resynchronization therapy (CRT) is a treatment for heart failure patients with conduction disease.
• A significant percentage of CRT recipients do not improve, prompting a re-evaluation of treatment criteria.
• Current mechanical dyssynchrony assessments are insufficient for predicting CRT success.

Purpose of the Study:

• To review the role of the electrical substrate in CRT.
• To assess the electrical substrate's importance and sufficiency for successful CRT.
• To discuss novel methods for measuring and treating the electrical substrate.

Main Methods:

• Literature review of current knowledge on electrical substrate in CRT.
• Analysis of the electrical substrate's application in current CRT practice.
• Exploration of emerging techniques for electrical substrate assessment and modulation.

Main Results:

• The electrical substrate is crucial for successful CRT outcomes.
• Electrical substrate assessment offers a more accurate and reproducible method compared to mechanical assessments.
• Novel approaches to measuring and targeting the electrical substrate are under development.

Conclusions:

• The electrical substrate is essential and sufficient for successful CRT.
• Focusing on the electrical substrate may improve patient selection and CRT efficacy.
• Further research into novel electrical substrate-based therapies is warranted.