Figure 6: Excimer Laser Coronary Atherectomy for Stent Underexpansion.

An illustration of severe stent under-expansion in the ostium of a large dominant right coronary artery from a female patient who has previously undergone percutaneous coronary intervention a few weeks before in another institution (A). The minimal lumen area (B). From the right radial artery, using a 7F guiding catheter along with a guideliner extension, the lesion was treated with 0.9-mm X80 Excimer laser coronary atherectomy catheter. Seven thousand pulses were delivered and this facilitated balloon angioplasty, with full expansion of a balloon (D). The final angiographic and intravenous ultrasound result is shown in (F) and (E), respectively, with full stent expansion having been achieved.