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The aim of this study was to compare the in-hospital outcomes of multiport antegrade cold blood cardioplegia through vein grafts versus conventional antegrade cold blood cardioplegia in patients with left ventricle systolic dysfunction who underwent coronary artery bypass grafting (CABG).  Methods  This prospective, randomized clinical study was comprised of patients undergoing on-pump CABG at the Ch. Pervaiz Elahi Institute of Cardiology in Multan, Pakistan from November 18, 2018 to December 17, 2019. Patients with multivessel coronary artery disease and left ventricular systolic dysfunction (ejection fraction < 50%) were included. In Group A (N = 73), multiport antegrade cold blood vein graft cardioplegia was given after every distal anastomosis completed for myocardial preservation. In Group B (N = 73), conventional antegrade cold blood cardioplegia was given for myocardial preservation.  Results  Spontaneous rhythm (without defibrillation applied) after cross-clamp removal was higher in Group A than in Group B (93.3% vs. 85.2%, p < 0.05). Duration of support, ventilation time, and hospital stay were also significantly lower in Group A than in Group B with p = 0.00001, p = 0.03, and p = 0.002, respectively. Intra-aortic balloon pump insertion (4.1% vs. 23.0%, p = 0.02) and operative mortality (0.5% vs. 4.0%, p = 0.35) were also lower in Group A than in Group B. Postoperative left ventricular ejection fraction (LVEF) increased more in Group A than in Group B, and the postoperative LVEF mean value was 44.68% in Group A versus 41.26% in Group B (p = 0.02).  Conclusion  Multiport vein graft blood cardioplegia provides superior myocardial protection in patients with left ventricular systolic dysfunction who underwent CABG. It is also easy to administer, so this technique can be adopted as a routine method for myocardial protection in patients with left ventricular dysfunction planned for on-pump CABG.

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Cardio-Protective Effects of Multiport Antegrade Cold Blood Cardioplegia Versus Antegrade Cold Blood Cardioplegia in Patients With Left Ventricular Systolic Dysfunction Undergoing Conventional Coronary Artery Bypass Grafting