This article discusses the symptoms and causes of real cardiac chest pain. Cardiac chest pain is caused by reduced blood flow to the heart, usually due to narrowed or blocked arteries. Symptoms of cardiac chest pain include a tight, squeezing or crushing sensation in the chest, pain radiating to the left arm, shoulder, back, neck or jaw, and shortness of breath. It is important to seek immediate medical attention if experiencing these symptoms as it may be a sign of a heart attack.