冠脉内成形及支架术前后QT离散度的变化 |
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引用本文: | 梁峰,孔繁钰.冠脉内成形及支架术前后QT离散度的变化[J].山西医药杂志,1999,28(4):272-274. |
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作者姓名: | 梁峰 孔繁钰 |
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作者单位: | [1]山西省心血管疾病研究所 [2]太原市人民医院 |
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摘 要: | 观察冠脉内成形+支架术(PTCA+Stent)对心绞痛患者QT离散度(QTd)的影响。方法:选择成功行PTCA+Stent术的29例患者,无心肌梗死病史。取术前1d~10d(3.83±2.88)d和术后1d~6d(2.69+1.26)d两份心电图。从导联间最大QT间期(QTmax)减去最小QT间期(QTmin)得到QTd,同样得到校正的QTd(QTcd)。结果:QTd、QTcd术前为(58.97±19.15)ms、(62.9±21.36)ms,术后(32.07±10.14)ms、(32.52±13.32)ms,(P<0.001,P<0.001)。QTmax术前为(412.4±33.98)ms,术后为(392.4±23.9)ms,有显著差异(P<0.001),但心率校正后的QTcmax术前为(429.2±31.99)ms,术后为(426.9±26)ms,无显著差异(P>0.5)。而QTmin及心率校正的QTcmin术前(353.5±24.5)ms、(366.3±22.7)ms,术后(361±20.79)ms、(394.3±24.1)ms,均有显著差异(P<0.05,P<0.001),且QTcmin的差异更显著?
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关 键 词: | 经皮经腔冠状动脉成形术 冠状动脉内支架 心电描记术 QT离散度 |
EFFECT OF CORONARY ANGIOPLASTY AND STENT IMPLANTATION ON QT DISPERSION |
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Abstract: | Objective:Dispersion of the QT interval (QTd) is a measure of inhomogeneity of ventricular repolarization.Because ischemia can increase the QTd,successful revascularization would improve the blood supply of the ischemic myocardium and reduce the QTd.We determined the effect of coronary angioplasty and stent implantation on QTd.Methods:Twenty nine patients with angina pectoris without prior myocardial infarction who underwent percutaneous transluminal coronary angioplasty (PTCA) and stent implantation were evaluated.Surface 12~18 leads electrocardiograms were selected 1~10 days before and 1~6 days after PTCA+Stent respectively,QT dispersion was determined from differences between the maximum and minimum QT intervals;similarly,QTcd was obtained.Results: QTd,QTcd before PTCA+Stent were (58.97±19.15)ms,(62.9±21.36)ms;after PTCA+Stent (32.07±10.14)ms,(32.52±13.32)ms (P<0.001,P<0.001).The QTmax before and after PTCA+Stent was significantly different (P<0.001)but QTcmax before and after PTCA+Stent was not (P>0.5).Both QTmin and QTcmin before PTCA+Stent were significantly different from after that;difference of QTcmin was more significant than that of QTmin.After PTCA+Stent,ventricular tachyarrhythmia in two patients disappeared.Conclusion:The major findings of this study were: ①a significant reduction in QTd,QTd follows successful PTCA+Stent;②the reduction in QTd after successful PTCA+Stent is due to prolongation of QTmin;③ ventricular tachyarrhythmia in two patients disappeared after PTCA+Stent. |
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Keywords: | percutaneous transluminal coronary angioplasty intracoronary stent electrocardiogram QT dispersion |
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