Discrete sites of frequent premature ventricular complexes cluster within the infarct border zone and coincide with high frequency of delayed afterdepolarizations under adrenergic stimulation

被引：17
作者：
Amoni, Matthew [1 ,2 ]
Claus, Piet [3 ]
Dries, Eef [1 ]
Nagaraju, Chandan [1 ]
De Buck, Stijn [4 ]
Vandenberk, Bert [2 ]
Ingelaere, Sebastian [1 ,2 ]
Vermoortele, Dylan [3 ]
Roderick, H. Llewelyn [1 ]
Sipido, Karin R. [1 ]
Willems, Rik [1 ,2 ]
机构：
[1] Katholieke Univ Leuven, Dept Cardiovasc Sci, Expt Cardiol, Leuven, Belgium
[2] Univ Hosp Leuven, Div Cardiol, Leuven, Belgium
[3] Katholieke Univ Leuven, Dept Cardiovasc Sci, Imaging & Cardiovasc Dynam, Leuven, Belgium
[4] Katholieke Univ Leuven, Dept Elect Engn, Proc Speech & Images, Leuven, Belgium
来源：
HEART RHYTHM | 2021年 / 18卷 / 11期
关键词：
KEYWORDS Action potential; Delayed afterdepolarization; Myocar-; ventricular complex; ABLATION; ARRHYTHMIAS; ARRHYTHMOGENESIS;
D O I：
10.1016/j.hrthm.2021.07.067
中图分类号：
R5 [内科学];
学科分类号：
1002 ; 100201 ;
摘要：
BACKGROUND Sympathetic activation in ischemic heart disease can cause lethal arrhythmias. These often are preceded by premature ventricular complexes (PVCs), which at the cellular level could result from delayed afterdepolarizations. OBJECTIVE The purpose of this study was to identify and map vulnerable areas for arrhythmia initiation after myocardial infarction (MI) and to explore the link between PVCs and cellular events. METHODS Anterior-septal wall MI was induced by 120 minutes of coronary occlusion followed by reperfusion (27 MI and 16 sham pigs). After 4 weeks, EnSiteTM electroanatomic mapping combined with imaging was performed to precisely locate PVC sites of origin and subsequently record monophasic action potentials. Cardiomyocytes were isolated from different regions to study regional cellular remodeling. Isoproterenol was used as a surrogate for adrenergic stimulation both in vivo and in cardiomyocytes. RESULTS PVCs originated from the MI border zone (BZ) and
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页码：1976 / 1987
页数：12
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