 Composite morbiditymortality score This will be a weighted morbidity score. It will score 3 points for death, 2 points for a major morbid outcome and 1 point for any minor outcome. Major morbid outcome is defined as any outcome that is permanent e.g. stroke or has a natural history in that it could lead to death, but without actually causing death. It is derived from morbidity likely to result from inadequate tissue perfusion or immunomodulation. 