SELF LIMITING TRANSIENT POLYURIA POST AORTIC VALVE REPLACEMENT

Polyuria is not an uncommon perioperative complication, following coronary artery bypass surgery. Diabetes insipidus (DI) results from inadequate secretion of antidiuretic hormone (ADH) the pituitary gland (Central DI)or absence normal response by renal tubules to ADH(Nephrogenic DI).Here we present a 55 years old male who underwent Aortic valve replacement. Postoperatively he developed polyuria and was diagnosed with (DI). Its most likely due toalteration within left atrial non-osmotic receptor during cardioplegia.It can also be dysfunction osmotic receptors in hypothalamus because transient cerebral ischemia resultingdue microthrombi Cardio-Pulmonary Bypass.The patient recovered symptoms without any administration vasopressin.