QRS complex
The deflections in an electrocardiogram (EKG) tracing that represent the ventricular activity of the heart.
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- QT syndrome, long
A disorder of the heart’s electrical system that predisposes individuals to irregular heartbeats, fainting spells, and sudden death. The irregular heartbeats are typically brought on by stress or vigorous activity. Abbreviated LQTS. LQTS is often symptoml
- Quack
1) A practitioner who suggests the use of substances or devices for the prevention or treatment of disease that are known to be ineffective. 2) A person who pretends to be able to diagnose or heal people, but is unqualified and incompetent.
- Quackery
Deliberate misrepresentation of the ability of a substance, a device, or a person to prevent or treat disease.
- Quadrant
A quarter of an area. For example, the liver is in the right upper quadrant of the abdomen.
- Quadriceps
Although the term “quadriceps” technically may refer to any four-headed muscle, it usually refers to and is synonymous with the quadriceps muscle of the thigh, the large muscle that comes down the femur (the bone of the upper leg), goes over the patella (the kneecap) and anchors into the top of the tibia (the big […]