Adverse Events Patients undergoing cardiac surgery represent a population at relatively high risk of a range of perioperative complications inherent to their underlying disease, co-morbidities and the nature of the surgery being undertaken. In the pilot study the mortality rate was 25 %. It is not intended to report the occurrence all of these events to the Human Research and Ethics Committee. Any adverse events that do arise specifically in relation to the conduct of the proposed study will be reported to the Committee