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The main energy supply to the heart is oxygen supplied by the coronary arteries. For more information contactHeartquestionsanswerd@hotmail.co.uk To get ANY heart question answerd. Use this information as a guide only I am NOT a doctor but I know a lot about the heart.

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14y ago
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14y ago

Oxygen is the main fuel and energy source of the heart. If oxygen to the heart is limited the heart can use other substances as its energy such as latic- acid, glucose, fatty acids.

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16y ago

About 7 percent of your total overall energy used by your metabolic processes in a day.

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Q: How much energy is required for the heart to function?
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