OBJECTIVES: Off-pump coronary artery bypass grafting occurrence increases constantly. However transient low cardiac output events occur during this procedure requiring aggressive volume replacement, which may lead to hypervolemia and its complications. METHOD: This study evaluates the safety and efficacy of a hypertonic-hyperoncotic NaCl solution (6% hydroxyethylamide + 7.5% sodium chloride) versus isotonic saline during the creation of anastomosis in the lateral wall of the left ventricle. In each case, 250 ml of solution was administered from coded bags at the start of the grafting procedure. All staff directly connected with the surgical procedure and post-operative management of patients was blinded to the coding. The primary objective was the determination of post-surgery complications. Secondary objectives were the determination of mean arterial blood pressure and central venous pressure during anastomotic grafting. RESULTS: Primary objectives showed no difference between hypertonic versus isotonic saline in post-operatory surgery complication. Significant increases of mean arterial pressure and central venous pressure in the Hypertonic Saline group versus normal saline patients during grafting were observed. CONCLUSION: The use of hypertonic saline during off-pump coronary artery bypass grafting on the lateral posterior wall of the left ventricle led to no complications and improved arterial and central venous pressure, favoring the creation of anastomosis in this wall.
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