Circ Arrhythm Electrophysiol:窦房结自体真皮成纤维细胞注入后,能显著减缓房颤中的房室传导和心室率

2015-02-06 MedSci MedSci原创

房颤患者的药物治疗(以保持长期的窦性心律和实现心室率控制)缺乏疗效,以及不能耐受药物的副作用。非药物方法比如肺静脉隔离,虽然有效,但是并不适用于所有患者。随机对照临床试验显示,心室率控制对于房颤患者有着良好的疗效。心室率控制对于房颤治疗而言,仍然不是一项可以治本的策略,对于有症状的患者,当通过药物和其他非药物治疗失败后,房室结消融开始逐渐走向舞台,在大多数患者中都获得了良好的疗效,然而,该技术却需

房颤患者的药物治疗(以保持长期的窦性心律和实现心室率控制)缺乏疗效,以及不能耐受药物的副作用。非药物方法比如肺静脉隔离,虽然有效,但是并不适用于所有患者。随机对照临床试验显示,心室率控制对于房颤患者有着良好的疗效。心室率控制对于房颤治疗而言,仍然不是一项可以治本的策略,对于有症状的患者,当通过药物和其他非药物治疗失败后,房室结消融开始逐渐走向舞台,在大多数患者中都获得了良好的疗效,然而,该技术却需要进行永久起搏器植入术。虽然很多方法都尝试对房室结进行控制,然而却终究因完全性房室传导阻滞望而却步。因此,伦敦帝国学院Tondato F等人通过对猪的实验,进行窦房结注入自体成纤维细胞治疗,从而研究其与心室率的控制,房室传导和房室传导阻滞之间的关系,研究成果发表在1月份Circulation Arrhythmia and electrophysiology期刊上。

背景:没有房室传导阻滞的房颤患者,进行非药物心室率控制仍然是一项临床难题。研究了假说:未发生房室传导阻滞的房颤患者,自体皮肤成纤维细胞注入房室后,能够减弱心室反应。

方法和结果:将自体成纤维细胞或生理盐水通过电解剖方法注入房室结,进行为期28的心电图记录,并行电生理学研究。自体成纤维细胞注射组28天后,与注射前比较,发现PR间期延长(130±13毫秒 vs. 113±14毫秒,p=0.04),窦性节律和400ms心房起搏AH间期各为(92±13毫秒 vs. 76.8±8毫秒, P<0.01)和(102±13毫秒 vs. 91±9毫秒, P<0.01),窦房结文氏周期长度(230±19毫秒 vs. 213±24毫秒, P<0.01),与对照组相比并没有变化。注入自体成纤维细胞和对照组相比,28天后,其RR间期有所延长(488±120毫秒 vs. 386±116毫秒, P<0.001)。组织学分析表明,第28天时窦房结内仍然存在自体成纤维细胞。两组注射后,加速性交界性心动过速和 莫氏I型房室传导阻滞都有短暂发生。

结论:在窦房结内注入的自体成纤维细胞能够存活4周,并且显著降低房颤中的房室传导和心室率。窦房结中尽管注入了大量的自体成纤维细胞,对房室传导有显著影响,但房室传导阻滞并没有发生。仍需要更多的研究证明本项研究在控制房颤心室率的临床可行性和安全性。

原始出处:

Tondato F, Zeng H, Goodchild T, Ng FS, Chronos N, Peters NS. Autologous Dermal Fibroblast Injections Slow Atrioventricular Conduction and Ventricular Rate in Atrial Fibrillation in Swine. Circulation Arrhythmia and electrophysiology. 2015.

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    2015-03-04 canlab
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    2015-02-16 Johnny1989

    0

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