快室率的心房颤动(房颤)可影响患者心室舒张充盈功能,心房泵血功能丧失,心排出量降低,心肌缺血、心脏功能恶化,甚至出现低血压、休克等血流动力学障碍.房颤时持续增快的心室率可致心动过速性心肌病.房颤时最常见的症状,多由于快心室率和不规则心律所引起,控制心室率不仅可减轻症状,对于部分房颤患者而言心室率控制后可改善心功能.
目的 探讨肾交感神经高频电刺激(RSN-S)对缺血性室性心律失常的影响.方法 18只体重17-20Kg的正常成年杂种犬麻醉后暴露左侧肾动脉,在肾动脉表面通过高频电刺激(20Hz,2ms脉宽)定位有效的刺激靶点,并在相应靶点固定刺激电极.
Background Dilated cardiomyopathy(DCM),which is characterized by left ventricular enlargement,systolic dysfunction and heart failure.Many cases(20％–35％)of DCM are familial,suggests that genetic factor
Circadian rhythms influence the incidence of sudden cardiac death after chronic heart failure(CHF)but the underlying mechanisms are not well defined.We sought to investigate the role of the β-adrenerg
Background β2 adrenergic receptor(β2-AR)activation increases risk of sudden cardiac death(SCD)in heart failure(HF).Non-selective β-AR blockers have larger beneficial effects on survival than selective
Objectives The purpose of this study is to assess the relation of electrocardiographic QRS duration to left ventricular myocardial scar valued by SPECT myocardial perfusion imaging in nonischemic and
Objective We tested the hypothesis that low level tragus stimulation(LLTS)could suppress intermittent hypoxia induced atrial fibrillation(AF)through autonomic modulating.
Background Previous studies suggest that renal sympathetic nerves can modulate central sympathetic tone.Recently,a beneficial effect of renal sympathetic denervation(RSD)has been seen in patients with
Objective This study was designed to demonstrate that spinal cord stimulation(SCS)could suppress high-frequency stimulation(HFS)induced focal atrial fibrillation(AF)at atrial and pulmonary veins(PVs)s
Purpose Encoding Nav1.5 sodium ion channels,mutations of SCN5A are responsible for type-3 long QT syndrome(LQT3)and sudden infant death syndrome(SIDS).This study aimed to determine the cause of sudden