'Post perfusion syndrome' was a term historically associated to cardiac surgery in view of the transient neuro-cognitive deficits attributed to cardio pulmonary bypass pump. During their recovery period, a significant number of patients experience delirium, a clinical syndrome of acute onset and fluctuant course.Though these deficits are often known to be transient without any permanent physical or neurological impairment, the experience can still psycho-socially affect these patients for a longer length of time even after discharge. The presence of delirium puts excessive, undesired strain on the patient, their families, health care providers and hospital resources.