冠心病患者PTCA及支架植入术前后QT离散度对比

QT dispersion before and after PTCA and of intracoronary-stent

目的 探讨冠心病患者 Ｐ Ｔ Ｃ Ａ 及支架术前、后相关血管血流通畅后对 Ｑ Ｔ离散度的影响。方法 经选择性冠状动脉造影诊断为冠状动脉粥样硬化，单支、双支或三支病变狭窄＞ ７０％ 者（２８ 例），行冠状动脉成形（ Ｐ Ｔ Ｃ Ａ）及冠脉内支架植入术，取术前一天及术后一天内的心电图，测量 Ｑ Ｔ离散度（ Ｑ Ｔｄ）。结果术后患者心电图 Ｑ Ｔｄ 较术前明显减小，有显著性差异（ Ｐ＜ ００１）。结论 Ｐ Ｔ Ｃ Ａ 及支架植入术能有效、迅速地将严重狭窄或闭塞的冠状动脉再通，使心肌细胞再灌注，术后 Ｑ Ｔｄ 较术前减小也可能有效地避免严重心律失常及猝死。

Objective To evaluate the effect of reopening of coronary artery after PTCA and intracoronary-stent on QT dispersion(QTd)in patients with coronary heart disease (CHD).Method 28 patients with CHD whose coronary narrowing were more than 70% with significant coronary narrowing in single,double or triple coronary artery disease by angiography were selected.All patients underwent PTCA and intracoronary-stent implement.QTd were measured before and after coronary intervention.Results QTd was decreased significantly after PTCA and intracoronary-stent( P <0 01) Conclusion PTCA and intracoronary-stent can quickly and effectively reopen stenostic and occlusive coronary artery.Decrease of QTd after coronary intervention could prevent serious arrhythmia and cardiac sudden death.