This document summarizes ischemic heart disease, including its definition, causes, symptoms, diagnosis, and treatment. Ischemic heart disease is caused by narrowing of the coronary arteries which reduces blood flow and oxygen to the heart. It is usually due to atherosclerosis from risk factors like smoking, diabetes, and high cholesterol. Symptoms include chest pain and shortness of breath. Diagnosis involves ECG, stress test, and angiogram. Treatment focuses on lifestyle changes, medications, angioplasty, or bypass surgery to improve symptoms and prognosis.