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Purpose: We evaluated the feasibility of off-pump minimally invasive direct coronary artery bypass (MIDCAB) in combination with robotic harvesting of the left internal mammary artery (LIMA). Methods: Since 2004, 33 patients [average age, 64 years; 27 males (82 %)] have undergone MIDCAB with robotic LIMA harvesting performed through the fourth or fifth intercostal space with guidance by enhanced computed tomography (CT). Results: No deaths or major adverse cardiac events occurred. Robotic LIMA harvesting was completed in 30 cases (91 %), while three cases (9 %) required conversion to a median sternotomy due to bleeding. The risk of LIMA injury significantly increased with age ( p = 0.0012). For the 30 successful cases, the average harvest time was 68 min, and the average intraoperative blood loss was 306 ml, with only three patients (9 %) requiring a transfusion. The graft flow was measurable in all cases (average, 34 ml/minute). All grafts were shown to be patent in postoperative evaluations, although CT revealed that the LIMA in one patient was anastomosed to an untargeted artery. Conclusions: Off-pump MIDCAB in combination with robotic harvesting of the LIMA is a reasonable and less invasive procedure than the standard procedures. Potential problems include difficulty controlling bleeding from the graft, especially in elderly patients, and proper identification of the target artery. [ABSTRACT FROM AUTHOR]

Cardiac allograft vasculopathy (CAV) is a major cause of mortality after transplantation. We treated a 44-year-old female with off-pump coronary artery bypass grafting (OPCAB) 4 years after heart transplantation. Annual examinations, including coronary angiography and intravenous ultrasound (IVUS), revealed a severe lesion in the left main trunk. The left internal mammary artery was successfully anastomosed to the left anterior descending artery in an off-pump manner. To ensure that patients have a good long-term outcome after heart transplantation, routine examinations, including IVUS, are crucial, because of the nature of CAV. OPCAB is a good option for a left main trunk lesion due to CAV. [ABSTRACT FROM AUTHOR]