Treatment for LMCA ostial stenosis using a bifurcation technique with a retrograde approach.

A 69-year-old man who underwent coronary artery bypass surgery in February 2008. The surgery included grafting of the left internal thoracic artery (LITA) to the diagonal branch (D1) and a saphenous vein graft (SVG) to the left circumflex artery (LCX) due to ostial stenosis of the left main coronary artery (LMCA). The patient presented with recurring effort chest pain 18 months later. Coronary CT revealed that the LITA-D1 graft was patent, the SVG-LCX graft was occluded, and there was severe ostial stenosis of the LMCA. Coronary angiography was performed in August 2009, but a 5-Fr diagnostic catheter could not be engaged due to the severe ostial stenosis. Percutaneous coronary intervention (PCI) was performed 5 days later with an attempt to cross the lesion with a guidewire using a retrograde approach through the LITA-D1 graft. However, the guidewire could not be crossed using a conventional technique due to the extreme angulation of the LITA-D1 anastomosis. Therefore, we attempted to use a reversed guidewire technique. After crossing the LMCA ostial lesion the retrograde wire was snared through antegradely for insertion of the guiding catheter via the right brachial artery. We were able to engage the guiding catheter in the left coronary artery and implant the stent successfully using the antegrade approach.