Background: This study was carried out to evaluate the effect of Indian Classical Music (Raga Therapy) on Fentanyl, Vecuronium, Propofol requirements and cortisol levels during cardiopulmonary bypass. Cardiopulmonary bypass is associated with immense stress response and high levels of intra operative cortisol levels which is detrimental to the patient and involves large doses of Fentanyl, Propo...