نبذة مختصرة : Broad QRS and bundle-branch blocks are associated with poor outcomes in patients with DCM, however, studies on changes in QRS duration and morphology over long-term are limited. We retrospectively analyzed changes in ventricular activation and AV conduction in serial ECGs of 165 DCM patients with a follow-up of at least 5 years from 2003 to 2022. The mean QRS duration at the last follow-up was 114.2 ± 29 vs 106.2 ± 25.3 msec at the baseline(p
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