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. 2019 Oct 28;8(21):e013539. doi: 10.1161/JAHA.119.013539

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© 2019 The Authors. Published on behalf of the American Heart Association, Inc., by Wiley.

This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

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Sudden cardiac death and ventricular arrhythmias according to postimplantation changes in QRS area and QRS duration. Kaplan–Meier survival curves for the combined end point of sudden cardiac death (SCD), ventricular tachycardia (VT)/ventricular fibrillation (VF), or shock according to postimplantation reductions in QRS area (QRS _area, ≥45 μVs) QRS duration (QRSd to any value below baseline). *Refers to the comparison of the group with concomitant reductions in QRS _area (≥45 μVs) and QRSd against the group with no reductions in either variable. HR indicates hazard ratio.