Ten years patency of left internal mammary artery trunk dissection graft after coronary artery bypass procedure

The left internal mammary artery （LIMA） had become the conduit of choice for myocardial revascularization, since it has been rates of LIMA grafts are proved that 10 ears patency more than 90%. The arterial graft trunk dissection is a rare event, affecting the procedure effects and related to reoperation.3 According to Kim and coworker＇s study,4 the arterial graft trunk delayed dissection manifested by early post-operative angiography only occurred in 6 of 1111 of the off-pump coronary artery bypass grafts. So up to now, the consequence of dissections without severe hemodynamic abnormality is beyond our knowledge.