To maintain cardiac output adequate to the metabolic needs of the body in case of heavy blood loss the heart would

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The heart would simultaneously speed up its contraction rate and increase the contractility of heart muscle to maintain cardiac output adequate to the metabolic needs of the body in case of heavy blood loss. This is achieved through the sympathetic nervous system's activation of beta-1 receptors on the heart, which increases heart rate and contractility. This compensatory mechanism helps to maintain blood pressure, tissue perfusion, and oxygen delivery until blood loss is resolved or treated. If blood loss continues, cardiac output will eventually decrease, and only the transfusion of blood can help.

To Maintain Cardiac Output Adequate to the Metabolic Needs of the Body