Cardiac output may decrease if the heart beats too rapidly because:

Ventricular Tachycardia is a type of fatal arrhythmia that forms one ofnthe most common forms of Cardiac arrest.

Ventricular Tachycardia is dangerous because the heart beats too fast that the ventricles are unable to fill with blood and are hence unable or have a decreased cardiac output.

Competition. interaction among organisms that compete for the same natural resource (food, shelter, water, space) in an ecosystem. predation. an interaction in which one organism kills another for food. predator. prey. symbiosis. mutualisum. commensalisum. parasitisum.

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