RELATIONSHIP BETWEEN CORONARY ANGIOSCOPIC AND INTRAVASCULAR ULTRASOUND IMAGING AND RESTENOSIS

In order to investigate the relationship between restenosis and the mo rphology detected by coronary angioscopy (CASC) and introvascular ultr asound imaging (IVUS), 17 patients were detected by CASC and IVUS imme diately and 3 months after percutaneous transluminal coronary angiosco py (PTCA), The results showed that the dilation index by IVUS (DIu) wa s significantly lower in restenosis patients than in non-restenosis pa tients (0.42 +/- 0.08 versus 0.78 +/- 0.16, P < 0.01) and that the ela stic recoil (ER) was higher in restenosis patients than in non-resteno sis patients (4.51 +/- 1.42 mm(2) versus 1.63 +/- 1.20 mm(2), P < 0.01 ), and that the elastic recoil rate (ERR) was also higher in restenosi s patients than in non-restenosis patients (57.3 +/- 8.07% versus 21.8 0 +/- 16.84% P < 0.01), and that coronary dissection, atheromatous pla que and calcification as well as the colour of inner coronary artery h ad no relation with chronic restenosis. In conclusion, the elastic rec oil is one of the important factors of chronic restenosis after PTCA.