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52例心肌便塞后病人,平均随访33.4月,其中6例心源性死亡。死亡组QT>QS_2者5/6例,明显高于存活组5/46例;而死亡组QTc 延长发生率4/6例,仅稍高于存活组10/48例。6例病人曾多次测定其QT 间期均恒定长于QS_2间期,而QTc 可在正常或异常范围。提示QT>QS_2是较QTc 延长更有价值的危险指标。
52 cases of myocardial infarction patients, with an average follow-up 33.4 months, of which 6 cases of cardiac death. 5/6 cases of QT> QS_2 in death group were significantly higher than 5/46 cases in survival group, while the incidence of QTc prolongation in death group was 4/6 cases, which was only slightly higher than 10/48 cases in survival group. Six patients had multiple measurements of QT interval were longer than the QS_2 interval, and QTc in the normal or abnormal range. Tip QT> QS_2 is a more valuable indicator of risk than QTc prolongation.