Coronary Artery Disease, Causes, Signs and Symptoms, Diagnosis and Treatment. 

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Chapters
0:00 Introduction
1:01 Causes of Coronary artery disease
2:28 Symptoms of Coronary artery disease
3:16 Diagnosis of Coronary artery disease
4:22 Treatment of Coronary artery disease
Coronary artery disease (CAD), also called coronary heart disease (CHD), ischemic heart disease (IHD),[13] or simply heart disease, involves the reduction of blood flow to the heart muscle due to build-up of plaque (atherosclerosis) in the arteries of the heart.[5][6][14] It is the most common of the cardiovascular diseases.[15] Types include stable angina, unstable angina, myocardial infarction, and sudden cardiac death.[16] A common symptom is chest pain or discomfort which may travel into the shoulder, arm, back, neck, or jaw.[4] Occasionally it may feel like heartburn. Usually symptoms occur with exercise or emotional stress, last less than a few minutes, and improve with rest.[4] Shortness of breath may also occur and sometimes no symptoms are present.[4] In many cases, the first sign is a heart attack.[5] Other complications include heart failure or an abnormal heartbeat.[5]
Risk factors include high blood pressure, smoking, diabetes, lack of exercise, obesity, high blood cholesterol, poor diet, depression, and excessive alcohol.[6][7][17] A number of tests may help with diagnoses including: electrocardiogram, cardiac stress testing, coronary computed tomographic angiography, and coronary angiogram, among others.[8]
Ways to reduce CAD risk include eating a healthy diet, regularly exercising, maintaining a healthy weight, and not smoking.[9] Medications for diabetes, high cholesterol, or high blood pressure are sometimes used.[9] There is limited evidence for screening people who are at low risk and do not have symptoms.[18] Treatment involves the same measures as prevention.[10][19] Additional medications such as antiplatelets (including aspirin), beta blockers, or nitroglycerin may be recommended.[10] Procedures such as percutaneous coronary intervention (PCI) or coronary artery bypass surgery (CABG) may be used in severe disease.[10][20] In those with stable CAD it is unclear if PCI or CABG in addition to the other treatments improves life expectancy or decreases heart attack risk.[21]
In 2015, CAD affected 110 million people and resulted in 8.9 million deaths.[11][12] It makes up 15.6% of all deaths, making it the most common cause of death globally.[12] The risk of death from CAD for a given age decreased between 1980 and 2010, especially in developed countries.[22] The number of cases of CAD for a given age also decreased between 1990 and 2010.[23] In the United States in 2010, about 20% of those over 65 had CAD, while it was present in 7% of those 45 to 64, and 1.3% of those 18 to 45;[24] rates were higher among men than women of a given age.[24]