The role of contractile dyssynchrony in pacing-induced cardiomyopathy: detailed assessment using index of contractile asymmetry

Cardiovascular Ultrasound

Research

Anders Sommer¹  Tomas Zaremba¹  Peter Søgaard²  Sam Riahi²  Patricia Zerlang Fruelund³  Claus Graff⁴  Søren Lundbye-Christensen⁵ 

[1] Department of Cardiology, Aalborg University Hospital, Hobrovej 18-22, 9000, Aalborg, Denmark;Department of Cardiology, Aalborg University Hospital, Hobrovej 18-22, 9000, Aalborg, Denmark;Department of Clinical Medicine, Aalborg University, Forskningens Hus, Sdr. Skovvej 15, 9000, Aalborg, Denmark;Department of Cardiology, Aalborg University Hospital, Hobrovej 18-22, 9000, Aalborg, Denmark;Department of Clinical Medicine, Aalborg University, Forskningens Hus, Sdr. Skovvej 15, 9000, Aalborg, Denmark;Department of Internal Medicine, Regional Hospital of Randers, Randers, Denmark;Department of Health Science and Technology, Aalborg University, Frederik Bajers Vej 7, 9220, Aalborg Øst, Denmark;Unit of Clinical Biostatistics, Aalborg University Hospital, Sdr. Skovvej 15, 9000, Aalborg, Denmark;

关键词: Cardiac pacing;    Pacing-induced cardiomyopathy;    Dyssynchrony;    Contractile asymmetry;    Computed tomography;    Speckle tracking;    Strain rate;    Echocardiography;   

DOI  :  10.1186/s12947-023-00308-6

 received in 2023-01-13, accepted in 2023-04-28,  发布年份 2023

来源: Springer

【 摘 要 】

AimsThe pathophysiological effects of chronic right ventricular pacing and the role of right ventricular lead position are not well understood. Therefore, we investigated the association between left ventricular contractile dyssynchrony and pacing-induced cardiomyopathy (PICM) in patients with chronic right ventricular pacing. Furthermore, we assessed the association between right ventricular lead location and left ventricular contractile dyssynchrony.MethodsThis was a retrospective study using data from 153 pacemaker patients with normal (≥ 50%) pre-implant left ventricular ejection fraction (LVEF). Baseline and follow-up echocardiograms were analyzed, and PICM was defined as LVEF < 50% with ≥ 10% decrease in LVEF after pacemaker implantation. Relative index of contractile asymmetry (rICA), a novel strain rate-based method, was calculated to quantify left ventricular contractile dyssynchrony between opposing walls in the three apical views. Right ventricular lead position was categorized into anterior septum, posterior septum, free wall, and apex based on contrast-enhanced cardiac computed tomography.ResultsForty-seven (31%) developed PICM. Overall contractile dyssynchrony, measured by mean rICA, was higher in the PICM group compared with the non-PICM group (1.19 ± 0.21 vs. 1.03 ± 0.19, p < 0.001). Left ventricular anterior-inferior dyssynchrony, assessed in the apical two-chamber view, was independently associated with PICM (p < 0.001). Thirty-seven (24%) leads were implanted anterior septal, 11 (7.2%) posterior septal, 74 (48.4%) apical, and 31 (20.3%) free wall. Left ventricular anterior-inferior dyssynchrony was significantly different between the four pacing lead locations (p < 0.01) with the highest rICA observed in the posterior septal group (1.30 ± 0.37).ConclusionsPICM is significantly associated increased contractile dyssynchrony assessed by rICA. This study suggests that especially left ventricular dyssynchrony in the anterior-inferior direction is associated with PICM, and pacing the right ventricular posterior septum resulted in the highest degree of anterior-inferior dyssynchrony. Quantification of left ventricular dyssynchrony by rICA provides important insights to the potential pathophysiology of PICM and the impact of right ventricular lead position.Graphical Abstract

【 授权许可】

CC BY   
© The Author(s) 2023

【 图 表 】

Fig. 4

41116_2023_36_Article_IEq390.gif

41116_2023_36_Article_IEq342.gif

Fig. 1

Fig. 2