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目的:探讨QT间期离散度(QTd)对“早期复极”人群潜在心脏事件的预测价值。方法:选取A组15名健康成人,B组15名“早期复极”不伴心脏症状者,C组15名“早期复极”伴有心脏症状者,计算三组人群QT间期离散度(QTd),校正后的QT间期离散度(QTcd)。结果:A组QTd,QTcd为0.0497±0.0230秒,0.0566±0.0271秒。B组QTd,QTcd为0.0501±0.0300秒,0.0611±0.0373秒。C组QTd,QTcd为0.0913±0.0324秒,0.1058±0.0378秒。C组与A组之间的差异具有统计学意义。而B组与A组之间的差异无统计学意义。结论:在“早期复极”人群中其QTd及QTcd越大则出现心脏事件几率越大。
Objective: To investigate the predictive value of QTd (QTd) on potential cardiac events in early repolarization. Methods: Fifteen healthy adults in group A, 15 patients in group B, and those without heart symptoms in group B and 15 patients in group C with cardiac symptoms were enrolled in this study. QT Period dispersion (QTd), corrected QT interval dispersion (QTcd). Results: QTd and QTcd in group A were 0.0497 ± 0.0230 seconds and 0.0566 ± 0.0271 seconds respectively. Group B QTd, QTcd 0.0501 ± 0.0300 seconds, 0.0611 ± 0.0373 seconds. Group C QTd, QTcd 0.0913 ± 0.0324 seconds, 0.1058 ± 0.0378 seconds. The difference between group C and group A was statistically significant. The difference between group B and group A was not statistically significant. Conclusions: The greater the QTd and QTcd in the “early repolarization” population, the greater the chance of having a heart attack.