IVUS findings during percutaneous coronary intervention. (a) The first guide wire passed through the false lumen from the midportion of the LMT to the proximal site of the LAD, and the true lumen of the LAD was compressed by the enlarged false lumen (orange arrow). (b) The second guide wire was inserted into the LCX, and IVUS imaging confirmed that it had been placed in the true lumen from the LMT to LCX (yellow arrow). (c) The third guide wire passed entirely through the true lumen from the LMT to LAD (green arrow). LMT: left main trunk; LAD: left anterior descending artery; LCX: left circumflex artery; IVUS: intravascular ultrasound.