ABSTRACT
Morphological observations Coronary angiography is usually unable to detect the effect of coronary interventions on the vessel wall. The authors compared a group of patients who underwent PTCA and HFRA using intravascular ultrasound (IVUS) with those who underwent angiography and found that patients with HFRA only seldom have intimal dissection. The postin tervention consequences of the plaques are closely related to their character.5 Intravascular ultrasound studies have shown that the vessel lumen after
Figure 26.1. A patient with total occlusion of the LAD (upper panel). High-frequency rotational angioplasty was carried out using 1.25 mm, 1.75 mm, and 2.25 mm burrs. IVUS shows a good result, with a circular, symmetrical lumen with a smooth surface. 4.8 F catheter, 20 MHz transducer.
