Long-term outcomes of upgrading to cardiac resynchronization therapy in patients with left bundle branch block or right ventricular pacing

Figures

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  Figure 1. Study flowchart. CRT = cardiac resynchronization therapy; LBBB = left bundle branch block.

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  Figure 2. Kaplan-Meier analysis of the primary end point in the entire cohort. Kaplan-Meier survival curve of freedom from all-cause death or heart failure (HF) hospitalization (primary end point) in the entire study cohort. Patients in the Upgrade group (green line) had a higher risk of the primary end point than those in the LBBB group (blue line), and a lower risk than those in the non-LBBB group (red line). LBBB = left bundle branch block.

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  Figure 3. Kaplan-Meier analysis of the primary end point in the Upgrade group. Kaplan-Meier survival curve of freedom from all-cause death or heart failure (HF) hospitalization (primary end point) in the Upgrade group, stratified by left atrial diameter (LAD). Patients with LAD >50 mm (orange line) had a higher risk of the primary end point than those with LAD ≤50 mm (purple line). No significant difference was observed between patients with LAD ≤50 mm in Upgrade group and those in the LBBB group (blue line). LAD = left atrial diameter; LBBB = left bundle branch block.