IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-12-12-53650 Original Research Paper A Study On Post-Operative Atrial Fibrillation Among Patients Undergoing Cardiac Surgery At A Tertiary Level Hospital In West Bengal Ashis Halder Dr. Dr. Haripada Das Dr. December 2023 12 12 01 02