Role of the Seasonal Cycle in Atrial Fibrillation Seen after Coronary Artery Bypass Surgery

Background: We aimed to investigate the effect of seasons on atrial fibrillation that occurred after coronary bypass surgery operation. Method: 187 patients underwent coronary artery bypass operation in our clinic between July 2018 - July 2019. Isolated coronary artery bypass graft operation was performed with cardiopulmonary bypass to179 of these patients. Forty three patients that developed atrial fibrillation after coronary bypass operation, demographic, laboratory findings and date of atrial fibrillation data investigated retrospectively. Results: Forty three patients developed atrial fibrillation after coronary artery bypass surgery. Forty one patients operated in winter, 48 in spring, 47 in summer, 43 in autumn and 13 patients developed atrial fibrillation in winter, 11 (25.6%) in spring, 8 (20.9%) in summer and 11 (23.3%) in autumn respectively. There is no statistical significance found by Z test that performed for all seasons for atrial fibrillation. Conclusion: There are many reasons that could play role on developing atrial fibrillation after coronary artery bypass surgery. There are many publications that report vitamin D deficiency as a reason for developing atrial fibrillation after coronary bypass surgery. In our study, we did not evaluate a relationship between the development of post operative atrial fibrillation and seasons.

The Effect of the Hemofiltration-Body Surface Area on the Mortality and Morbidity during Cardiopulmonary Bypass

The aim of this study is to investigate the effect of the hemofiltration-body surface area on mortality and morbidity during cardiopulmonary bypass (CBP). A total of 226 patients were divided into two groups as hemofiltration (HF) performed or not performed. The patients to whom hemofiltration was performed were also divided into three subgroups after the distribution analysis which was done according to body surface area. All patients were compared according to the relationship of hemofiltration-body surface area during cardiopulmonary bypass in the interms of mortality and morbidity. There was no statistically significant relationship between the subgroups according to the amount of hemofiltration by square meters (p = 0.818). There was statistically significant difference in total perfusion times and total hospital stay (p = 0.025;p = 0.038) between the subgroups which were divided by the amount of hemofiltration in square meters. As a result, no effect was observed on the mortality of the relationship between the amount of hemofiltration applied during CBP and body surface area.