Cardiac arrest is a sudden loss of heart function caused by an electrical malfunction in the heart. This leads to a loss of consciousness, breathing, and blood circulation and is a life-threatening medical emergency that requires immediate treatment, including CPR and defibrillation, to restore normal heart function and prevent death.

A heart attack is a medical emergency caused by a blockage in the blood flow to the heart, leading to damage or destruction of the heart muscle. Symptoms include chest pain, shortness of breath, and other symptoms. Prompt medical treatment, such as medications or angioplasty, is necessary to restore blood flow and prevent further damage to the heart.