Evaluation of Plasmatic Magnesium Levels and Its Association with Atrial Fibrillation After Cardiac Surgery

Introduction: Postoperative atrial fibrillation is one of the most frequent complications in cardiac surgery, with an expected incidence of more than 50% following valve surgery. Hypomagnesemia is also likely to be observed in the postoperative period, and several studies have suggested that it could be related to the incidence of postoperative atrial fibrillation. In this study, via a prospective design and adjustment for multiple covariates, the investigators will seek to determine whether plasma magnesium levels are independently associated with the appearance of postoperative atrial fibrillation.

Methods: An analytical design involving a concurrent cohort will be carried out in a high-complexity hospital with a cardiovascular focus. Serial postoperative plasma magnesium measurements will be included as independent variables in a logistic regression model to determine their association with atrial fibrillation after adjusting for multiple covariates.