Although the cause of syncope can be life - threatening ( e . g . , ventricular tachycardia ) and the result can be devastating ( e . g . , fractured hip ) , a definitive explanation for syncope is found less than one half of the time 虽然晕厥的病因可能危及生命（如室性心动过速） ，并会产生严重后果（如髋部骨折） ，但说得清楚的晕厥却不到一半。
Although presently available therapeutic interventions are , as a rule , successful in suppressing isolated , acute episodes of vt ( ventricular tachycardia ) , long range suppression of ventricular ectopic arrhythmias is more difficult 虽然用现有的治疗方法抑制单独的室性心动过速急性发作通常是成功的，但是要长期抑制室性异位性心律失常则比较困难。
Fried man p ， stevenson w g ， bittl j ， et al . left main coronaryartery occlusion during radiofrequency catheter ablation of idio2athic outflow treat ventrcular tachycardia j . p a ce ， 1997 ， 20 ： 1 184 马坚，王方正，余培祯，等.射频消融治疗起源于左室流出道的非持续性室性心动过速和频发性室性早搏j .中华心律失常学杂志， 1999 ， 3 （ 2 ） 126 - 1296
Here we report a case of a life - threatening ventricular tachycardia which was triggered from intermittent ventricular arrhythmia by pain during change of dressings on an unanesthetized patient with severe hypokalemia 我们要报告一位严重低血钾病患于无麻醉情形之下更换纱布时，因为疼痛引起原本间歇性的心室心律不整进展为足以危害生命的无脉性心室频脉。
Adenosine with its rapid onset and brief duration of action has a number of clinical applications including treatment of paroxysmal supraventricular tachycardia and maximal coronary vasodilatation during pharmacologic stress testing 摘要由于腺甘酸的作用快速且短效，使其在许多方面，包括心室上心搏过速及在药物压力测试上使冠状动脉扩张等方面有其应用。
Clinical manifestations include atypical chest pain , an abnormal resting ekg , a positive treadmill test , sustained ventricular tachycardia , bundle branch blockage , paroxysmal atrioventricular block , reversible perfusion defect noted on thallium scan , etc 临床表徵包括非型胸痛、异常心电图变化、跑步机式验阳性、持续性心室频脉、吏传导阻滞、阵发性房室阻断、铊-心肌扫描可见可逆性心肌灌流不足等等。
