Myocardium normally utilizes:

Hea uses fatty acids in fed and fasting state. It uses Ketone bodies during starvation. Fetal hea and hea failure, uses glucose as fuel Source of fuel in various tissues and cells under different conditions Fed Fasting Starvation Brain Glucose Glucose Ketone Bodies Hea Fatty Acids Fatty Acids Ketone Bodies Liver Glucose Fatty Acids Amino Acids Muscle Glucose Fatty Acids Fatty Acids and KB Adipose tissue Glucose Fatty Acids Fatty Acids RBC Glucose Glucose Glucose