• Mymensingh Med J · Oct 2020

    Coronary Artery Revascularization with the Left Internal Mammary Artery (LIMA) to Diagonal (D) & Left Anterior Descending (LAD) Sequential and LIMA-LIMA "Y" Graft, Our Experiences at National Heart Foundation Hospital and Research Institute.

    • M H Rahman, S S Howlader, P K Chanda, F Ahmed, and A K Rahman.
    • Dr Mohammad Hafizur Rahman, Associate Professor & Consultant, Department of Cardiac Surgery, National Heart Foundation Hospital and Research Institute (NHFH&RI), Dhaka, Bangladesh; E-mail: drmhrp@yahoo.com.
    • Mymensingh Med J. 2020 Oct 1; 29 (4): 939-944.

    AbstractThe Left internal mammary artery (LIMA) is considered the conduit of choice for the surgical treatment (CABG, coronary artery bypass grafting) of Coronary artery disease (CAD) due to its superior long term potency than the other conduits. Sequential anastomosis with the LIMA in CABG increases the number of arterial graft and more completeness the arterial revascularization. To increase the number of arterial graft and improved long term potency, an alternative technique is sequential anastomosis of LIMA to Diagonal (D) & left anterior descending artery (LAD) and LIMA-LIMA "Y" Graft play a vital role in patients with tight proximal lesion. Perioperative data were prospectively collected from all patients with isolated CAD with tight proximal LAD lesion, who underwent off-pump CABG from November 2013 to October 2015 at a single Centre. A total of 321 patients had LIMA to D & LAD sequential and LIMA-LIMA "Y" grafts pattern with severe proximal LAD lesion. The mean age was 54.7±8.4 years, male & female ratio was 29.7:7.5. Left main involvement was in 25% & triple vessel disease was 89% with LVEF 53.6±8.6%. Sequential LIMA to diagonal (side to side) & LAD (end to side) done in all 294 cases and LIMA-LIMA"Y" grafts in 27 cases. Thirty days mortality was 0.935% (3 patients). Postoperative myocardial infarction (MI) occurred in 2 patients (0.623%). Two sequential LIMA graft failed and both the diagonal & LAD bypassed coronary arteries were very narrow, about 1mm in diameter. All the patients underwent postoperative NYHA class evaluation at 3-6 months follow up & found normal and none of the patients suffered for angina. Revascularization with skeletonized sequential LIMA anastomosis to D, LAD & LIMA-LIMA "Y" graft is a safe, feasible with improve overall long-term potency and reproducible alternative in the presence of severe proximal LAD lesion to the complete revascularization of the anterior& lateral myocardial wall. Long term follow-up with coronary angiogram is essential to recommend this technique as standard one.

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