What does the heart use as its primary fuel source?

Question

Quizplus · Accepted Answer

The heart primarily uses fatty acids as its fuel source. Although it can also use glucose and lactate, fatty acids are the primary fuel source due to the heart's high oxidative capacity and abundance of mitochondria, which allows for efficient use of fatty acids as a fuel source. Amino acids can also be used in times of extreme stress or starvation, but are not the heart's primary fuel source. Calcium is not a fuel source for the heart.

What Does the Heart Use as Its Primary Fuel Source