IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-9-12-32570 Original Research Paper A STUDY ON PRE AND POST OPERATIVE SERUM ELECTROLYTES IN PATIENTS UNDERGOING CARDIAC SURGERY- A PROSPECTIVE OBSERVATIONAL STUDY Hema Malini. R Dr. Dr. Vajrala Yugandhara Rajesh Dr. December 2020 9 12 01 02