Overview The ENIGMA II Trial:Nitrous Oxide Anaesthesia and Cardiac Morbidity After Major Surgery: a Randomised Controlled Trial Status: Completed Trial end date: 0000-00-00 Target enrollment: Participant gender: Summary To investigate the safety of nitrous oxide (N2O) anaesthesia in patients with risk factors for coronary artery disease undergoing major surgery. Phase: Phase 4 Details Lead Sponsor: Bayside HealthCollaborator: National Health and Medical Research Council, AustraliaTreatments: AnestheticsNitrous Oxide