Angina pectoris is the result of myocardial ischemia caused by an imbalance between myocardial blood supply and oxygen demand. It is a common presenting symptom (typically, chest pain) among patients with coronary artery disease (CAD). 

Signs and symptoms
Patients should be asked about the frequency of angina, severity of pain, and number of nitroglycerin pills used during episodes. Symptomatology reported by patients with angina commonly includes the following:
-- Retrosternal chest discomfort (pressure, heaviness, squeezing, burning, or choking sensation) as opposed to frank pain
-- Pain localized primarily in the epigastrium, back, neck, jaw, or shoulders
-- Pain precipitated by exertion, eating, exposure to cold, or emotional stress, lasting for about 1-5 minutes and relieved by rest or nitroglycerin
-- Pain intensity that does not change with respiration, cough, or change in position

Treatments for Angina
Treatments for angina include lifestyle changes, medicines, medical procedures, cardiac rehabilitation (rehab), and other therapies. The main goals of treatment are to:
-- Reduce pain and discomfort and how often it occurs
-- Prevent or lower your risk for heart attack and death by treating your underlying heart condition
-- Lifestyle changes and medicines may be the only treatments needed if your symptoms are mild and aren't getting worse. If lifestyle changes and medicines don't control angina, you may need medical procedures or cardiac rehab.

Lifestyle Changes
Making lifestyle changes can help prevent episodes of angina. You can:
-- Slow down or take rest breaks if physical exertion triggers angina.
-- Avoid large meals and rich foods that leave you feeling stuffed if heavy meals trigger angina.