Right ventricular apex pacing: is it obsolete?

Area of Science:

• Cardiology
• Biomedical Engineering
• Clinical Electrophysiology

Background:

• Right ventricular apical pacing (RVAP) is frequently used for sinus node dysfunction and atrioventricular block.
• RVAP-induced ventricular desynchronization is linked to increased long-term morbidity and mortality.
• Pathophysiological studies confirm RVAP causes abnormal contraction, reduced pump function, and cardiac remodeling.

Purpose of the Study:

• To review clinical evidence on the effects of various pacing sites.
• To compare adverse and beneficial outcomes of different pacing modalities.
• To propose an algorithm for selecting optimal pacing strategies.

Main Methods:

• Review of clinical trial data on pacemaker patients.
• Analysis of pathophysiological findings related to pacing.
• Development of a decision-making algorithm for pacing modalities.

Main Results:

• Right ventricular apical pacing is associated with adverse long-term clinical outcomes.
• Alternative pacing sites (right ventricular, left ventricular, biventricular) may offer different risk-benefit profiles.
• Pacing-induced desynchronization negatively impacts cardiac function and structure.

Conclusions:

• The choice of pacing site significantly influences patient outcomes.
• A tailored approach to pacemaker selection is crucial.
• The proposed algorithm aids in optimizing pacing modality selection based on patient-specific factors.