The V-shaped notch at the top of the breastbone (sternum).
- Supraventricular tachycardia
Abbreviated SVT. A regular, abnormally fast heart beat (tachycardia) caused by rapid firing of electrical impulses from a focus above the atrioventricular node (A-V node) in the heart. Called supraventricular because the tachycardia originates above the ventricles of the heart.
- Surface EMG
“There is in fact almost no literature to support the use of SEMG in the clinical diagnosis and management of nerve or muscle disease.” Still, the SEMG may prove of value in the future in helping to monitor the progression of disorders of nerves and muscles.
A fluid secreted by the cells of the alveoli (the tiny air sacs in the lungs) that serves to reduce the surface tension of pulmonary fluids; surfactant contributes to the elastic properties of pulmonary tissue, preventing the alveoli from collapsing.
A physician who treats disease, injury, or deformity via operative or manual methods to physically change body tissues. The definition of surgeon has begun to blur in recent years as surgeons have begun to minimize the cutting, employing new technologies that are minimally invasive (such as using scopes and lasers). In England, a surgeon was […]
- Surgeon General
Under the Surgeon General there currently are more than 6,100 officers on active duty. Officers are assigned to all of the PHS Agencies and to a number of agencies outside of PHS, including the Bureau of Prisons, U. S. Coast Guard, Environmental Protection Agency, Health Care Financing Administration, and the Commission on Mental Health of […]