Trace Element Status and Postoperative Morbidity After On-pump Coronary Artery Bypass Surgery

Abstract

Trace elements are essential micronutrients that take part in most antioxidant reactions in the body. In this study, we evaluated the levels of copper, chromium, manganese, selenium, magnesium, zinc, iron, and silicon in adult patients who undergone isolated on-pump coronary artery bypass with the occurrence of postoperative atrial fibrillation, transient renal injury, transient liver injury, and rate of wound infection; 51 adult patients (41 men, 10 women) underwent isolated coronary artery bypass grafting (CABG) under cardiopulmonary bypass. The mean age was 61,9 ± 8,0 years (range 45-82 years). Blood samples were collected preoperatively, postoperative first hour, postoperative first day, and fifth postoperative day for element analysis. Serum levels were determined by an Inductive Coupled Plasma Optical Emission Spectrometer (ICAP 6000). Serum copper, zinc, and selenium values, typically known as strong antioxidant elements in the body, decreased significantly during the first hour and first day of postoperative period compared to the preoperative period (p < 0.05). Also, postoperative atrial fibrillation, transient renal injury, transient liver injury, and rate of wound infection were observed to increase with the decrease in levels of trace elements (p < 0.05). The levels of these elements were observed to return to normal levels during the fifth postoperative day. The levels of trace elements decrease significantly after on-pump coronary artery bypass surgery. Our study results suggest that this could be one of the predisposing factors for increased postoperative atrial fibrillation, transient kidney injury, transient renal injury, and increased rate of wound infections for patients undergoing on-pump coronary artery bypass grafting.

Keywords: Cardiopulmonary bypass; Copper; Selenium; Trace elements; Zinc.