Decline in deaths from coronary heart disease and stroke have resulted from risk-factor modification, such as smoking cessation and blood pressure control coupled with improved access to early detection and better treatment. Since 1972, death rates for coronary heart disease have decreased 51%.
- Healthy food label
A food that is low in fat and saturated fat and that contains limited amounts of cholesterol and sodium. If it is a single-item food, it must also provide at least 10 percent of one or more of vitamins A or C, iron, calcium, protein, or fiber. Exempt from this “10-percent” rule are certain raw, […]
- Hearing aid
Behind-the-ear (BTE) hearing aids, In-the-ear (ITE) hearing aids, In-the-canal (ITC) hearing aids, and Completely-in-the-canal (CIC) hearing aids. There is also a body hearing aid for very severe hearing loss. In general, hearing aids should ideally be binaural (in both ears), if the hearing loss involves both ears.
- Hearing screening test, newborn
Screening of the newborn baby’s ability to hear. Newborn screening of hearing is done with automated auditory brainstem response tests or, less often, with what are called otoacoustic emission or conventional auditory brainstem response tests. The aim is to detect those babies with hearing deficits and teach them sign language in infancy or give them […]
the right heart and the left heart. The right heart consists of the right atrium, which receives deoxygenated blood from the body, and the right ventricle, which pumps the deoxygenated blood to the lungs under low pressure; and the left heart, which consists of the left atrium, which receives oxygenated blood from the lung, and […]
- Heart block
A blockage in the conduction of the normal electrical impulses in the heart. Heart block is not uncommon and is detected with an electrocardiogram. Heart block occurs from degeneration or scarring of the electrical pathways in the heart muscle, either naturally or as a result of disease. Heart block typically requires no treatment, but can […]