Risk factors of pacing-induced cardiomyopathy-Insights from lead position

Area of Science:

• Cardiology
• Electrophysiology
• Heart Failure

Background:

• Pacing-induced cardiomyopathy (PICM) is a concern with long-term cardiac pacing.
• The optimal lead placement to minimize PICM risk remains debated.
• Right ventricular apex pacing is common but may be associated with adverse remodeling.

Purpose of the Study:

• To compare the incidence of PICM between right ventricular apex pacing and mid-right ventricular septum pacing.
• To identify predictors of PICM in patients undergoing pacemaker implantation.

Main Methods:

• A comparative study design was employed.
• Patients were divided into two groups based on pacing lead location: right ventricular apex and mid-right ventricular septum.
• Incidence of PICM was assessed, and potential predictors including preoperative left ventricular end-systolic diameter and paced QRS duration were analyzed.

Main Results:

• No significant difference in the incidence of pacing-induced cardiomyopathy was observed between the right ventricular apex pacing group and the mid-right ventricular septum pacing group.
• Preoperative left ventricular end-systolic diameter was identified as an independent predictor of PICM.
• Paced QRS duration was also found to be an independent predictor of PICM.

Conclusions:

• Lead placement at the right ventricular apex versus the mid-right ventricular septum does not significantly alter the risk of developing pacing-induced cardiomyopathy.
• Left ventricular end-systolic diameter and paced QRS duration are crucial factors to consider for predicting PICM development.
• Further research may explore alternative pacing strategies or patient-specific factors influencing PICM.