Computed tomography validated right ventricular mid-septal lead implantation using right ventricular angiography

Area of Science:

• Cardiology
• Medical Imaging
• Electrophysiology

Background:

• Right ventricular (RV) mid-septal pacing is an alternative to RV apical pacing.
• Current methods like fluoroscopy and ECG are unreliable for accurate lead placement.
• Defining optimal RV mid-septal pacing sites is crucial for effective treatment.

Purpose of the Study:

• To determine the optimal RV mid-septal pacing site using RV angiography.
• To compare RV angiography guidance with conventional fluoroscopy for lead placement.
• To validate lead positions using computed tomography (CT).

Main Methods:

• Patients were randomized into RV angiography-guided (Group A) or fluoroscopy-guided (Group F) groups.
• RV angiography was performed in multiple views with a segmented grid system.
• Computed tomography (CT) was used to validate lead tip positions in both groups.

Main Results:

• RV angiography significantly improved mid-septal lead placement (88.5% vs. 40.7%, P=.0003).
• Fluoroscopy-guided placement resulted in leads in the anterior wall or RV outflow tract.
• A specific segment on the RAO 30° and LL views accurately predicted mid-septal placement on CT.

Conclusions:

• RV angiography is a safe and effective tool for confirming RV mid-septal lead position.
• This technique enhances the accuracy of pacemaker lead placement.
• Angiographic guidance optimizes RV mid-septal pacing outcomes.