JOHN BAVOSI / SCIENCE PHOTO LIBRARY JOHN BAVOSI / SCIENCE PHOTO LIBRARY
Factors in heart disease. Illustration of factors involved in, and symptoms of, heart disease: hypertension, atherosclerosis, and lung oedema. The graph shows the hypertension J-curve, a curve which represents the number of deaths from heart attack (vertical axis) as it varies with diastolic blood pressure (horizontal axis) in patients with ischaemic heart disease. Blood pressures below or above a certain value increase the risk of heart attack. At left are blood vessels diseased with atherosclerosis, a thickening of the walls with fatty plaques which may cause blockage and clots. At right are fluid-filled lung alveoli (air sacs); this oedema may occur due to heart failure.
Model release not required. Property release not required.