A previously well and active 25 year old woman with no underlying structural heart disease presented with recurrent episodes of new onset syncope over a period of six hours. Her pulse was irregularly irregular at a rate of 230 beats/min. She was hypotensive with a blood pressure of 80/60 mm Hg. Twelve lead surface electrocardiogram (ECG) taken on admission is shown in fig 1. She was immediately electrically cardioverted to sinus rhythm with 150 J. She reported no history of recreational drug use or family history of sudden cardiac death.
Surface electrocardiogram during …

中文翻译：

---

晕厥在一个年轻女子。

一位先前健康，活跃的25岁女性，没有潜在的结构性心脏病，在六个小时内出现了新发晕厥的反复发作。她的脉搏以230次/分钟的速度不规则地不规则地运动。她血压低，血压为80/60 mm Hg。入院时测得的十二张铅表面心电图（ECG）如图1所示。她立即以150 J电心律转复窦性心律。她报告没有消遣性药物使用史或心源性猝死家族史。
…期间的表面心电图