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. 2020 Mar 26;8(6):1129–1136. doi: 10.12998/wjcc.v8.i6.1129

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©The Author(s) 2020. Published by Baishideng Publishing Group Inc. All rights reserved.

This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial.

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Coronary sinus venography and electrocardiogram. A: Coronary sinus venography performed from a left anterior oblique 30° angle, and presentation of the coronary vein; B: Anteroposterior view of the position of the final leads; C: Twelve-lead electrocardiograms revealed biventricular pacing and a QRS duration of 104 ms after successful implantation of a cardiac resynchronization therapy-defibrillator. AL: Atrial lead; RVL: Right ventricular lead; LVL: Left ventricular lead. LAO: Left anterior oblique.