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Why is oxygen so critical to heart muscle?

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Wiki User
August 30, 2017 10:48AM

Heart muscle is constantly working. It can not take rest. Working needed energy. Energy is derived from biological oxidation process. This process needs oxygen. Without an oxygen the muscle will die promptly. That is why oxygen is so much critical for the heart muscle.

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Wiki User
May 28, 2017 9:37PM

Oxygen plays many roles in the metabolic pathways that support contracture of the heart's cardiac muscle tissue.

The heart muscle is the only muscle in the body which is always working. It cannot stop and rest, because the body requires a constant circulation of blood, to supply the tissues of the body with oxygen and nutrients. The brain can only survive for 3 minutes without oxygen. So since the heart must constantly work, it requires a constant supply of oxygenated blood. Without it, the heart would not have the energy it requires to do its work, and would stop.