Electrophysiologic characteristics and catheter ablation of ventricular tachyarrhythmias among patients with heart failure on ventricular assist device support

Electrophysiologic characteristics and catheter ablation of ventricular tachyarrhythmias among patients with heart failure on ventricular assist device support
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DOI:
10.1016/j.hrthm.2012.01.018
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发表时间:
2012-06-01
期刊:
影响因子:
5.5
通讯作者:
Saliba, Walid I.
Saliba, Walid I.
中科院分区:
医学2区
文献类型:
--
作者:
Cantillon, Daniel J.;Bianco, Christopher;Saliba, Walid I.

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背景 室性快速性心律失常 (VT) 在心室辅助装置 (VAD) 接受者中很常见,但电生理 (EP) 特征和导管消融结果仍然未知。 目的 评估接受 VAD 支持的心力衰竭患者 VT 的 EP 特征和导管消融结果。 方法 克利夫兰诊所登记了 1991 年至 2010 年连续接受 VAD 植入的患者,这些患者患有难治性、难治性、结果 在 611 名 VAD 接受者中(平均年龄 53.3 +/- 12.4 岁,80% 为男性),21 名患者(3.4%)被转介进行 32 次 EP 手术,其中 11 名患者(52%)接受植入式心脏复律除颤器治疗(13 次电击,26 次抗心动过速起搏)。 44 例诱发性心动过速(平均周期长度 339 +/- 59 ms)的数据显示单形性室速(n = 40, 91%;上轴 52%,右束支传导阻滞形态 41%)和多形性室性心动过速 (PMVT)/心室颤动(n = 4, 8%)。 20 名患者的 28 例心动过速的电解剖图显示,与内在疤痕相关的折返性 VT(n = 28 例中的 21 例,75%)比心尖流入插管部位(n = 28 例中的 4 例,14%)、局灶性/微折返性 VT(n = 28 例中的 2 例,7%)或束支折返(28 例中的 n = 1 例)更常见, 3.5%)。 21 名患者中有 18 名 (86%) 导管消融成功。平均 133 +/- 98 天,21 名患者中有 7 名 (33%) 复发,6 名患者 (29%) 需要重复手术,21 名患者中有 4 名 (19%) 随后复发。 结论 导管消融 VT 在 VAD 接受者中是有效的。内在的心肌疤痕,而不是心尖装置插管部位,似乎是主要的基质。
BACKGROUND Ventricular tachyarrhythmias (VT) are common among ventricular assist device (VAD) recipients, yet electrophysiologic (EP) characteristics and catheter ablation outcomes remain uncharacterized.OBJECTIVE To evaluate the EP characteristics and catheter ablation outcomes for VTs among heart failure patients on VAD support.METHODS The Cleveland Clinic registry of consecutive patients undergoing VAD placement in 1991-2010 with medically refractory, symptomatic VT referred for EP study and catheter ablation.RESULTS Among 611 recipients of VAD (mean age 53.3 +/- 12.4 years, 80% men), 21 patients (3.4%) were referred for 32 EP procedures, including 11 patients (52%) presenting with implantable cardioverter-defibrillator therapy (13 shocks, 26 antitachycardia pacing). Data from 44 inducible tachycardias (mean cycle length 339 +/- 59 ms) demonstrated monomorphic VT (n = 40, 91%; superior axis 52%, right bundle branch block morphology 41%) and polymorphic ventricular tachycardia (PMVT)/ventricular fibrillation (n = 4, 8%). Electroanatomic mapping of 28 tachycardias in 20 patients demonstrated reentrant VT related to intrinsic scar (n = 21 of 28, 75%) more commonly than the apical inflow cannulation site (n = 4 of 28, 14%), focal/microreentry VT (n = 2 of 28, 7%), or bundle branch reentry (n = 1 of 28, 3.5%). Catheter ablation succeeded in 18 of 21 patients (86%). VT recurred in 7 of 21 patients (33%) at a mean of 133 +/- 98 days, and 6 patients (29%) required repeat procedures, with subsequent recurrence in 4 of 21 patients (19%).CONCLUSIONS Catheter ablation of VT is effective among recipients of VAD. Intrinsic myocardial scar, rather than the apical device cannulation site, appears to be the dominant substrate.