Intravascular ultrasound (IVUS) is a well-established diagnostic tool that
supplements coronary angiography in the evaluation of angiographical interm
ediate lesions as well as guiding Percutaneous transluminal coronary angiop
lasty. In this case report we describe the benefit of IVUS in diagnosing ps
eudostenosis as opposed to angiographically suspected guidewire induced dis
section, and suggest the use of IVUS in all cases where angiography is equi
vocal. We also report a case of preoperative IVUS where the ni us finding r
esulted in further coronary artery bypass grafting and suggest IVUS as a fe
asible alternative to probing of coronary arteries suspected of stenosis du
ring coronary artery bypass grafting.