小结
定义
持续性室性心动过速 (VT) 是指室性心律持续至少 30 秒超过 100 bpm，或因血流动力学不稳定而需要提前终止心动过速。VT 的定义为一种宽 QRS 波群心动过速（QRS 时限为 120 毫秒或更长），起源于左右心室其中之一，且非由差异性传导引起（例如，由束支传导阻滞引起），心率为 100 bpm 或更高。“特发性”VT 在无明显结构性心脏疾病（例如，既往心肌梗死、未治愈的心肌缺血、心肌病、心瓣膜病、致心律失常性右室心肌病、左室心肌致密化不全或其他心肌疾病）、已知离子通道病（例如，长 QT 综合征、Brugada 综合征、儿茶酚胺敏感性多形性 VT、短 QT 综合征）、药物中毒或电解质紊乱的情况下发生。VT 可描述为单形性或多形性的。尖端扭转性室性心动过速是一种具有典型扭转形态的多形性 VT，在 QT 间期延长的背景下发生。持续性 VT 通常引起低血压和虚弱、晕厥或心悸的症状；然而，心律失常可存在于无症状及血压正常的患者中。
[Figure caption and citation for the preceding image starts]: 持续性（单形性）室性心动过速由 Sei Iwai 教授收集；经允许使用 [Citation ends].
[Figure caption and citation for the preceding image starts]: 尖端扭转型室性心动过速由 Dr Kenneth Stein 和 Dr Richard Keating 收集；经允许使用 [Citation ends].
病史和体格检查
诊断性检查
治疗流程
撰稿人
作者
Professor of Clinical Medicine
New York Medical College
Director, Cardiac Electrophysiology
Westchester Medical Center Health Network
Valhalla
NY
利益声明
SI is on the Biosense-Webster speakers' bureau. He receives honoraria from Biotronik, Boston Scientific, and Medtronic for lectures, and research grant support from Boston Scientific.
Prof Sei Iwai would like to gratefully acknowledge Dr Kenneth Stein and Dr Richard Keating, previous contributors to this topic.
利益声明
KS declares he is an employee of and shareholder in Boston Scientific, a manufacturer of implantable cardioverter defibrillators and ablation catheters. RK declares that he has no competing interests.
同行评议者
Director
Electrophysiology Laboratory
The St. Luke's-Roosevelt Hospital Center
New York
NY
利益声明
SM declares that he has no competing interests.
Kontos Professor of Cardiology
Medical College of Virginia
Richmond
VA
利益声明
KAE declares that he has no competing interests.
Consultant Cardiologist and Electrophysiologist
Cardiac Department
John Radcliffe Hospital
Oxford
UK
利益声明
KR declares that she has no competing interests.
内容使用需遵循免责声明