 The course of recovery in the Coenzyme Q10 supplemented group was short (3–5 days) and uncomplicated.By contrast, the course of recovery in the placebo group was longer (15–30 days) and more complicated.There was a positive relationship between blood and heart muscle Coenzyme Q10 levels, heart muscle ATP levels, and indicators of heart function, on the one hand, and post-operative recovery time, on the other hand.