Chest Pain

When your coronary arteries are narrowed or blocked, oxygen-rich blood can't reach your heart muscle. This can cause chest pain or a heart attack.
Chest pain occurs when not enough oxygen-rich blood is flowing to an area of your heart muscle. This may feel like pressure or squeezing in your chest. The pain also may occur in your shoulders, arms, neck, jaw, or back.
A heart attack occurs when blood flow to an area of your heart muscle is completely blocked. This prevents oxygen-rich blood from reaching that area of heart muscle and causes it to die. Without quick treatment, a heart attack can lead to serious problems and even death.
Over time, CAD can weaken the heart muscle and lead to heart failure and irregular heartbeats. Heart failure is a condition in which your heart can't pump enough blood throughout your body. Irregular heartbeats are problems with the speed or rhythm of your heartbeat.