الفهرس 
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Abstract
Objectives: Assessment of the prognostic influence of off-pump (OPCAB) in relation
to on-pump coronary artery bypasses (ONCAB) techniques to establish the best
operative strategy.
Background: Patients planned for coronary artery bypass grafting (CABG) with left
ventricular dysfunction considered a high-risk group for morbidity and mortality.
Patients and methods: Between January 2013 and July 2016 in an observational study
we analyzed 79 patients with ejection fraction ≤35% who underwent primary,
nonemergency, isolated CABG via median sternotomy. Patients divided into two
groups; ONCAB (n41; 51.8%) and OPCAB (n38; 48.1%). Perioperative variables,
immediate and short terms mortality and morbidity were compared.
Results: Preoperative variables, age, body surface area, hypertension, smoking,
peripheral vascular disease, chronic obstructive pulmonary disease, neurological
dysfunction, myocardial infarction and ejection fraction were comparable. Diabetes
mellitus, New York Heart Association (NYHA)classes, Euro-score, number of
diseased vessels were more in ONCAB however, renal insufficiency was more in
OPCAB.
Operative time, a number of grafts, needs for inotropes, mechanical ventilation time,
blood transfusion, and troponin release were significantly lesser in OPCAB.
Conversion rate was 2.6%.
Hospital stay, in-hospital mortality, stroke, renal dysfunction, bleeding, re-exploration,
deep sternal wound infection, and atrial fibrillation were comparable.
No significant difference found in short term mortality, myocardial infarction,
revascularization, readmission, renal or neurological dysfunction.
Conclusions: OPCAB technique seems to reduce transfusion requirements,
respiratory complications and myocardial infarction rates immediate postoperatively
in patients with ischemic cardiomyopathy with no difference in short term mortality
and morbidity when compared to ONCAB technique.
Keywords: Coronary artery bypasses grafting, cardiopulmonary bypass, left
ventricular dysfunction, Off-pump coronary artery bypass grafting, postoperative