The Continued Search for Physiological Pacing: Where Are We Now?

Area of Science:

• Cardiology
• Biomedical Engineering
• Electrophysiology

Background:

• Cardiac pacing treats bradycardia from sinus node dysfunction or atrioventricular block.
• Optimal ventricular pacing site for physiological function and hemodynamics remains challenging.
• Traditional right ventricular (RV) apical pacing has known long-term deleterious effects.

Purpose of the Study:

• To review current cardiac pacing options.
• To focus on His-bundle pacing as a physiological pacing strategy.
• To evaluate novel pacing techniques for select patients.

Main Methods:

• Review of existing literature on cardiac pacing techniques.
• Analysis of physiological effects and hemodynamic responses.
• Comparison of His-bundle pacing with other ventricular pacing modalities.

Main Results:

• His-bundle pacing provides near-normal biventricular electrical activation.
• This avoids ventricular dyssynchrony associated with other pacing methods.
• Alternative left ventricular (LV) pacing strategies show promise in specific cases.

Conclusions:

• His-bundle pacing is a leading candidate for physiological cardiac pacing.
• It effectively mitigates ventricular dyssynchrony.
• Novel LV pacing techniques warrant further investigation for select patient populations.