论文部分内容阅读
心率校正后的 Q-T 间期正常最高值通常是0.44秒.Q-T 间期延长可并发室性心律失常、晕厥和猝死。各种遗传型和散发型复极延长综合征统被称为长Q-T 综合征(简称:LQTS)。特发性 LQTS 患者可能完全无症状,心电图异常只是偶然发现。通常在有先证病例的家族中,发现有人出现无法解释的晕厥,再经检查,发现是 LQTS。也有些 LQTS 病例是在调查先天性神经性耳聋病人时发现的。估计约0.3%的先天性神经性耳聋患者,心电图证明有 Q-T 间期延长。LQTS 患者晕厥反复发作是由于暂时性心室扑动或颤动。这种恶性心律失常的频繁发作造成晕厥和很高的猝死率.
Heart rate corrected Q-T interval is usually the highest normal value of 0.44 seconds .Q-T interval may be associated with prolonged arrhythmia, syncope and sudden death. Various genetic and sporadic bipolar extension syndrome is called long Q-T syndrome (LQTS). Idiopathic LQTS patients may be completely asymptomatic, abnormal ECG only by chance. Often, families with evidence-based cases were found to have unexplained syncope and, after examination, were found to be LQTS. Some LQTS cases are also found when investigating patients with congenital deafness. Approximately 0.3% of patients with congenital neurological deafness are estimated to have a Q-T interval extension on ECG. Recurrent syncope in LQTS patients is due to temporary ventricular flutter or fibrillation. Frequent episodes of this malignant arrhythmia result in syncope and high rates of sudden death.