Reversion of cardiac memory during left bundle branch pacing

Chenghao Zhong; Zhixin Jiang; Xiujuan Zhou; Qijun Shan

doi:10.1016/j.jelectrocard.2020.01.001

Reversion of cardiac memory during left bundle branch pacing

J Electrocardiol. 2020 Mar-Apr:59:81-83. doi: 10.1016/j.jelectrocard.2020.01.001. Epub 2020 Jan 7.

Authors

Chenghao Zhong¹, Zhixin Jiang², Xiujuan Zhou², Qijun Shan³

Affiliations

¹ Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China; Department of Cardiology, The Third Affiliated Hospital of Soochow University, Changzhou 213003, China.
² Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China.
³ Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China. Electronic address: qjshan@njmu.edu.cn.

PMID: 32023497
DOI: 10.1016/j.jelectrocard.2020.01.001

Abstract

Cardiac memory (CM) is identified as an altered T wave when normal ventricular activation resumes after an abnormal myocardial activation period. We present a case who initially underwent temporary right ventricular apex (RVA) pacing for one week which induced typical pseudo-primary T wave changes. The T wave inversion was observed after the end of RVA pacing when left bundle branch pacing (LBBP) was initiated, and the abnormal T waves gradually return to almost normal repolarization during LBBP 40 days later.

Keywords: Cardiac memory; Left bundle branch pacing; Pacemaker.

MeSH terms

Bundle-Branch Block* / therapy
Cardiac Pacing, Artificial
Electrocardiography
Heart Conduction System
Humans
Ventricular Septum*