In coronary heart disease, or CHD, plaque forms within the arteries of the heart, explains the National Heart, Lung, and Blood Institute. The plaque reduces the oxygen in the blood and causes additional heart problems, such as a heart attack or blood clot.
Pressure or pain in the chest, back, abdomen, neck or other upper extremities; an increase in pain during physical activity; and weakness are symptoms of coronary heart disease, according to MedlinePlus. Symptoms vary by gender, age and previous health conditions. Some people do not experience any symptoms. Another common name for coronary heart disease is coronary artery disease, notes the American Heart Association.