What are signs and symptoms of coronary artery disease?

Sometimes none. Coronary disease may have no symptoms until a heart attack occurs. The most common symptom is chest tightness, felt under the breastbone, though it may be felt in the jaw or left arm. "angina" is chest pain that comes with physical or emotional stress, when the heart is working harder. The pain o a heart attack is similar but can come at rest and lasts longer.
Chest pain. The main symptom would be chest pain especially that occuring on exertion. Most of the other signs and symptoms are related to complications of the disease and not the disease itself. If the disease leads to a heart attack then you could get shortness of breath, fatigue, passin out, or palpitations.