摘要
The purpose of this study was to demonstrate the relation between the transientchanges of electrocardiogram(ECG)on body surface during balloon dilating inpercutaneous transluminal coronary angioplasty(PTCA) and improvement of theresidual myocardial viability after PTCA,Eighteen patients with twenty-threecoronary arteries narrowing above 70% were underwent PTCA and myocardialviability was examined with 99mTc-MIB1 Singlephoton Emission ComputedTomography(SPECT)before and after the procedure.During the balloon dilating30-60s,the ECG with leads Ⅱ,Ⅲ.avF.V4 weve recorded.There were 15 caseswith ECG changes of T wave.ST-Seg-ment and QRS axis(65.2%,47 8% and26.1%.respectively),3 case without ECG chanse.More than 50% change of Twave altitude was scored as 1.ST segment shift(elevation≥lmm or depression≥0.5mm.10mm=lmv)as 2.QRS axis deviation≥15 as 3.Myocardial viabiliiy.was evaluated by SPECT with four-point of nine segments of the left ventricularwall.The integral value of ECG change dung PTCA was closely correlated withthe change value of SPECT(SPECT△)(r=0.74,p【0.01).The sensitivity of themethod was 80%;specificity 100%;the positive predictive value 100%;the negativepredictive value 50%;the accuracy 83.3%.This method was simple,useful and.excellent in evaluating myocardial viability.The rest myocardial viability afterPTCA was higher than it was before PTCA(21.2±3.8 vs 17.6±3.6point,P【0.01).The hibernating myocardial viability was improved post PTCA.
The purpose of this study was to demonstrate the relation between the transient changes of electrocardiogram(ECG)on body surface during balloon dilating in percutaneous transluminal coronary angioplasty(PTCA) and improvement of the residual myocardial viability after PTCA,Eighteen patients with twenty-three coronary arteries narrowing above 70% were underwent PTCA and myocardial viability was examined with 99mTc-MIB1 Singlephoton Emission Computed Tomography(SPECT)before and after the procedure.During the balloon dilating 30-60s,the ECG with leads Ⅱ,Ⅲ.avF.V4 weve recorded.There were 15 cases with ECG changes of T wave.ST-Seg-ment and QRS axis(65.2%,47 8% and 26.1%.respectively),3 case without ECG chanse.More than 50% change of T wave altitude was scored as 1.ST segment shift(elevation≥lmm or depression≥ 0.5mm.10mm=lmv)as 2.QRS axis deviation≥15 as 3.Myocardial viabiliiy. was evaluated by SPECT with four-point of nine segments of the left ventricular wall.The integral value of ECG change dung PTCA was closely correlated with the change value of SPECT(SPECT△)(r=0.74,p<0.01).The sensitivity of the method was 80%;specificity 100%;the positive predictive value 100%;the negative predictive value 50%;the accuracy 83.3%.This method was simple,useful and. excellent in evaluating myocardial viability.The rest myocardial viability after PTCA was higher than it was before PTCA(21.2±3.8 vs 17.6±3.6 point,P<0.01).The hibernating myocardial viability was improved post PTCA.
出处
《中国介入心脏病学杂志》
1998年第4期156-156,共1页
Chinese Journal of Interventional Cardiology
