What term describes the failure of blood flow to the heart?

The term that describes the failure of blood flow to the heart is "cardiac arrest." Cardiac arrest occurs when the heart stops beating effectively or completely ceases to function, which leads to a significant reduction or total cessation of blood flow to the body's organs, including the heart itself.

In cardiac arrest, the heart's electrical system malfunctions and causes an irregular heartbeat (arrhythmia), preventing it from pumping blood adequately. This condition is life-threatening and requires immediate medical intervention, typically through CPR and the use of an automated external defibrillator (AED) to restore normal heart rhythm and blood flow.

The other terms are related to cardiovascular and neurological events but do not specifically define the failure of blood flow to the heart. A heart attack refers to damage to the heart muscle due to blocked blood flow, whereas a stroke involves interrupted blood flow to the brain. Ventilation pertains to the process of breathing and the movement of air into and out of the lungs, which is distinct from blood flow issues.