治疗性低温期间的T波峰末间期、QT间期及J波形态
The pattern of Tpeak-Tend and QT interval, and J wave during therapeutic hypothermia.
作者信息
Kim Sun-Mi, Hwang Gyo-Seung, Park Jin-Sun, Shin Jeoung-Sook, Kim Gi-Woon, Yang Hyoung-Mo, Choi So-Yeon, Yoon Myeong-Ho, Shin Joon-Han, Tahk Seung-Jea
机构信息
Department of Cardiology, Ajou University School of Medicine, Suwon, South Korea.
Department of Cardiology, Ajou University School of Medicine, Suwon, South Korea.
出版信息
J Electrocardiol. 2014 Jan-Feb;47(1):84-92. doi: 10.1016/j.jelectrocard.2013.05.139. Epub 2013 Jun 27.
BACKGROUND AND PURPOSE
The electrocardiogram manifestations of hypothermia include J waves and prolongation of QT intervals. This study described changes in repolarization patterns during therapeutic hypothermia (TH).
METHODS
We measured the QTc and the interval from the peak to the end of the T wave (TpTe) from the V4 and V6 leads in 20 patients with TH. The TpTe was also expressed as a ratio to the duration of QT ([TpTe/QT]×100%), and to the corrected value for heart rate (TpTe/√RR).
RESULTS
The QTc became prolonged in all patients during TH. While the TpTe/√RR did not change, the ([TpTe/QTe]×100%] decreased significantly during TH. The J wave developed during TH in seven patients. With one patient, ventricular fibrillation occurred preceded by an abnormal J wave and prolonged TpTe during TH.
CONCLUSIONS
QTc prolongation without TpTe increase or abnormal J wave may not be arrhythmogenic during TH.
背景与目的
体温过低的心电图表现包括J波和QT间期延长。本研究描述了治疗性低温（TH）期间复极模式的变化。
方法
我们测量了20例接受TH治疗患者V4和V6导联的QTc以及从T波峰值到终点的间期（TpTe）。TpTe也表示为与QT持续时间的比值（[TpTe/QT]×100%），以及与心率校正值的比值（TpTe/√RR）。
结果
所有患者在TH期间QTc均延长。虽然TpTe/√RR没有变化，但在TH期间（[TpTe/QTe]×100%）显著降低。7例患者在TH期间出现J波。1例患者在TH期间出现异常J波和TpTe延长后发生心室颤动。
结论
在TH期间，QTc延长而TpTe不增加或无异常J波可能不会引发心律失常。
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