IVUS provided an exact and diffferent information about: lesion length (20, 17 ± 6, 43 mm sv 17, 39 ± 6, 79 mm; p < 0, 001), reference vessle diameter (3, 13 ± 0, 60 mm sv 2, 81 ± 0, 49 mm; p < 0, 001), minimal lumen area (3, 19 ± 0, 67 mm2 sv 1, 60 ± 0, 98 mm; p < 0, 001) respectively when compared with coronary angiography.