cardiac doctors near me Types of Cardiac Chest Pain: Stable Angina: Predictable and occurs with exertion or stress. Relieved by rest or medication. Unstable Angina: Unpredictable, occurs at rest, or is more severe than usual. A medical emergency as it may indicate an impending heart attack. Myocardial Infarction (Heart Attack): Prolonged and severe chest pain. May not be relieved by rest or nitroglycerin. Often accompanied by more pronounced symptoms like severe shortness of breath or loss of consciousness.