The underlying mechanisms vary depending on the disease.[3] It is estimated that dietary risk factors are associated with 53% of CVD deaths.[6] Coronary artery disease, stroke, and peripheral artery disease involve atherosclerosis.[3] This may be caused by high blood pressure, smoking, diabetes mellitus, lack of exercise, obesity, high blood cholesterol, poor diet, excessive alcohol consumption,[3] and poor sleep,[7][8] among other things. High blood pressure is estimated to account for approximately 13% of CVD deaths, while tobacco accounts for 9%, diabetes 6%, lack of exercise 6%, and obesity 5%.[3] Rheumatic heart disease may follow untreated strep throat.[3]
It is estimated that up to 90% of CVD may be preventable.[9][10] Prevention of CVD involves improving risk factors through: healthy eating, exercise, avoidance of tobacco smoke and limiting alcohol intake.[3] Treating risk factors, such as high blood pressure, blood lipids and diabetes is also beneficial.[3] Treating people who have strep throat with antibiotics can decrease the risk of rheumatic heart disease.[11] The use of aspirin in people who are otherwise healthy is of unclear benefit.[12][13]
Cardiovascular diseases are the leading cause of death worldwide except Africa.[3] Together CVD resulted in 17.9 million deaths (32.1%) in 2015, up from 12.3 million (25.8%) in 1990.[5][4]Deaths, at a given age, from CVD are more common and have been increasing in much of the developing world, while rates have declined in most of the developed world since the 1970s.[14][15] Coronary artery disease and stroke account for 80% of CVD deaths in males and 75% of CVD deaths in females.[3] Most cardiovascular disease affects older adults. In the United States 11% of people between 20 and 40 have CVD, while 37% between 40 and 60, 71% of people between 60 and 80, and 85% of people over 80 have CVD.[2] The average age of death from coronary artery disease in the developed world is around 80, while it is around 68 in the developing world.[14] CVD is typically diagnosed seven to ten years earlier in men than in women.[3]: 48
^ abInstitute of Medicine of the National Academies (2010). "Epidemiology of Cardiovascular Disease". In Fuster V, Kelly BB (eds.). Promoting cardiovascular health in the developing world : a critical challenge to achieve global health. Washington, DC: National Academies Press. ISBN978-0-309-14774-3. Archived from the original on 2017-09-08.