Angina pectoris: Angina pectoris, also called ischemic chest pain, is a type of chest pain caused by reduced blood flow to the heart. It can be sudden or recur over time and is a symptom of coronary artery disease. Symptoms include pressure, squeezing, heaviness, tightness, or pain in the chest.
Myocardial infarction: Myocardial infarction, also called heart attack, occurs due to blockage of blood flow to the heart muscle due to a blood clot. Symptoms of heart attack are pain or tightness in the chest, neck, arms or back, lightheadedness, anxiety, fatigue, and abnormal heartbeat.