Percutoneous transiuminal coronary anginplesty(PTCA)was performed in33 patients of coronary heart diseases(male 30 cases,female 3 cases, meanage 54.2) with Gruentzig’s method.Of all the 33 patients,there were 26narrow parts in 20 cases of the single branch lesions,27 narrow parts in 11cases of the double branch lesions and 11 narrow parts in 2 cases of thethree branch lesions.In 48 branches with lesion vessels,there were 27branches of the left anterior descending coronary arteries (LAD),7 branchesof the left cicumflex coronary arteries(LCX)and 13 branches of the rightcoronaw arteries.The narrow degrees varied from 75% to 100%. The resultswere that,of 33 patients,48 branches of lesion vessels and 64 narrow parts,the successful rates of dilation were 96.9%,87.5%,85.9%,respectively.Ventricular fibrillation occurred in one case during the procedure,whichsoon recovered sinus rhythm through cardioversion.Symptoms of thesuccessful 32 patients were lmproved obviously or diappeared after PATC.Combining with the documents,we think that the successful rates are higherin type A lesion undergoing PTCA.When PTCA for the multiple branchlesions are performed,we ought to master the principle of dilating the mainlessinos in advence.The long-tube lesions were dilated by the long balloonfitting for these lesions.The causes of failure of PTCA in the severe narrowlesions are mainly the the guilding wires or the balloon catheters cann’t passthrough the lesion parts,in addition,the complication problems in PTCA arealso discussed.
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