Qinghaosu
A Chinese herb (also called sweet wormwood) from which is extracted the antimalarial agent artemisinin.
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- QNS
On a lab report, Quantity Not Sufficient. The sample is not large enough to do the test.
- QRS complex
The deflections in an electrocardiogram (EKG) tracing that represent the ventricular activity of the heart.
- 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.