A comparison of long-term outcomes between narrow and broad QRS complex patients treated with cardiac resynchronization therapy

Introduction There are few registries for narrow QRSd ≤ 120 ms patients treated with cardiac resynchronization therapy (CRT). We report longterm outcomes for patients with narrow QRSd ≤ 120 ms compared to broad > 120 ms patients.Methods The study included 297 heart failure patients with a CRT device implanted from 2001 to 2012. LV reverse remodelling (reduction in LV end-systolic volume, LVESV, of < 15%), rates of hospitalization for heart...