Heart failure is a condition in which the heart cannot pump enough blood to meet the body's needs.

A heart attack occurs when an artery supplying your heart with blood and oxygen becomes blocked. Fatty deposits build up over time, forming plaques in your heart's arteries. If a plaque ruptures, a blood clot can form and block your arteries, causing a heart attack.

Cardiac arrest is a sudden loss of blood flow resulting from the failure of the heart to pump effectively.

Angina pectoris is the medical term for chest pain or discomfort due to coronary heart disease. It occurs when the heart muscle does not get as much blood as it needs.