 Pre-surgery supplementation improved blood Coenzyme Q10 and heart muscle tissue Coenzyme Q10 levels and heart muscle tissue ATP significantly compared to the placebo supplementation.Cardiac index and ejection fraction also improved but not to the level of statistical significance.Post-surgery supplementation was positively associated with the maintenance of normal blood and heart muscle tissue Coenzyme Q10 levels and normal heart muscle tissue ATP levels and with significantly improved cardiac index and ejection fraction.