Relationship between left ventricular lead position using a simple radiographic classification scheme and long-term...

Area of Science:

• Cardiology
• Electrophysiology
• Medical Devices

Background:

• Cardiac resynchronization therapy (CRT) effectiveness may depend on left ventricular (LV) lead placement.
• Optimizing LV lead position is crucial for improving CRT outcomes in heart failure patients.

Purpose of the Study:

• To investigate the association between LV lead position and patient outcomes following CRT.
• To determine if anterior LV lead placement impacts CRT efficacy and prognosis.

Main Methods:

• A cohort of 250 patients with LV dysfunction and advanced heart failure symptoms (NYHA class III/IV) receiving CRT were analyzed.
• LV lead position was classified as anterior, lateral, or posterior based on postoperative radiographs.
• Patients were followed for a median of 30 months to assess clinical response and adverse events.

Main Results:

• Anterior LV lead placement (8%) was associated with significantly lower clinical response rates (30%) compared to lateral (51%) or posterior (41%) positions (76% and 73%, respectively).
• An anterior lead position independently increased the risk of CRT nonresponse, cardiovascular death, heart failure mortality, and all-cause mortality by two to three-fold.
• In seven non-responding patients, repositioning the LV lead from an anterior to a nonanterior site resulted in complete clinical improvement.

Conclusions:

• Anterior LV lead positioning is an independent predictor of poor CRT response and adverse clinical outcomes.
• Consideration should be given to repositioning anteriorly placed LV leads in patients who do not respond to CRT to improve outcomes.