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QT间期延长综合征虽较少见,但对麻醉管理影响较大。此综合征尚未充分阐明,发生率也不太清楚;由于对它逐渐有所认识,所以已引起注意。QT间期延长综合征的特点是QT间期(QTI)延长。正常QT间期是依据心率校正,按Bazett公式QTc=(QTI)/(R—R间期)~(1/2)算出。测量QRS综合波的起始到T波的终点即为QTI。它代表心室的去极和复极化过程。先天性QT间期延长综合征(以下简称为LQTS)病人的机械收缩正常。
QT prolongation syndrome is rare, but has a greater impact on anesthesia management. This syndrome has not been fully elucidated and the incidence is not clear; due to its gradual awareness, it has drawn attention. QT prolongation syndrome is characterized by QT interval (QTI) prolongation. Normal QT interval is based on heart rate correction, according to Bazett formula QTc = (QTI) / (R-R interval) ~ (1/2) calculated. The end of measuring QRS complex to T wave is QTI. It represents the ventricular depolarization and repolarisation process. Patients with congenital QT prolongation syndrome (hereinafter referred to as LQTS) patients with normal mechanical contraction.