[Morphology of atheromatous change during and after PTCA and occurrence of restenosis]

The frequency of restenosis incidence in a group of 72 patients after effective PTCA as well as dependence of its incidence on dilated coronary artery and morphology of sclerotic changes according to ACC/AHA classification were analyzed. The subject of analysis included also effect of the degree of residual stenosis on restenosis incidence as well as determining dependence between the degree of dissection after PTCA on restenosis rate. Restenosis was stated in 20 (20.7% percent) patients, in 26 cases (29%) among 88 dilated coronary arteries. Restenosis was more frequently observed in cases of left coronary artery dilatation. Analyzing restenosis occurrence in relation to morphology of sclerotic changes according to ACC/AHA classification its more frequent incidence in type B (35%) and type C (44%) in comparison type A--25% of this classification was observed. The percentage of residual stenosis was higher in the group of restenosis and amounted to 22.8% in comparison to the residual stenosis of 13% in the group of patients with no reported restenosis. Localized dissection can be a good predictor of results after successful PTCA. More frequent incidence of limited dissection took place in 34% of dilated coronary arteries without restenosis in relation to 20% of cases with restenosis. No evidence of dissection as well as long dissection after PTCA was associated with higher degree of restenosis. Angiographic evaluation of the morphology of sclerotic changes in view of degree of dissection after PTCA is a good predictor of results after angioplasty.