2| MATERIALS AND METHODS
Between January 2012 and December 2016, a retrospective research
identified 1405 patients submitted to isolated coronary artery bypass
grafting (CABG) at the Hospital Santa Cruz. Of these patients, 170
underwent assessment of myocardial viability with myocardial perfusion
scintigraphy before surgery. Patients with emergency surgery (2) or
previous cardiac surgery (6) were excluded. These exclusion criteria
were selected a priori . Therefore, the study population consisted
of 162 patients operated during a 5-year interval.