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(floor-ō′sĭs, floo-ŏ-rō′sĭs) Chronic fluorine poisoning, sometimes marked by mottling of tooth enamel or by periostitis. It may result from excessive exposure to fluorides from dietary, waterborne, or supplemental sources. Prolonged use of voriconazol (an antifungal drug with significant fluoride content) has been associated with fluorosis.


(floor″ō-ūr′ă-sĭl″) [fluoro- + uracil] An antimetabolite used in treating certain forms of cancer.

fluoxetine hydrochloride

(floo-ŏks′ĭ-tēn″) A drug used in the treatment of depression, bulimia, and obsessive-compulsive disorder. It is an inhibitor of serotonin reuptake in the central nervous system.


(flush) 1. Sudden redness of the skin. 2. Irrigation with water of a cavity with a device such as a feeding tube. 3. Of structure or device, precisely placed against a structure; aligned.

hot f. Flash (1).

malar f. A bright-colored flush over the malar area and cheekbones. It may be associated with any febrile disease.


(floo-tĭ′kă-sōn″) A corticosteroid administered in an aerosol inhaler to treat and prevent asthma. It is also used as a nasal spray to treat seasonal allergic rhinitis, nasal polyps, and other chronic inflammatory conditions; and topically to manage allergic and immunological skin problems. Its therapeutic classes are antiasthmatics, corticosteroids, and allergy, cold, and cough remedies.


(flŭt′ĕr) 1. A tremulous movement, esp. of the heart, as in atrial and ventricular flutter. 2. In audiology, a repeating echo.

atrial f. ABBR: AF. A cardiac dysrhythmia marked by rapid regular atrial beating, occurring at a rate of about 300 beats per minute (bpm) and typically a regular ventricular response (whose rate may vary depending on the conduction of electrical impulse from the atria through the atrioventricular node). SEE: illus.



Atrial flutter


 SYMPTOMS AND SIGNS: Patients may be asymptomatic, esp. when ventricular rates are less than 100 bpm. During tachycardic episodes, patients often report palpitations, dizziness, presyncope, or syncope.

 DIAGNOSIS: On the electrocardiogram (ECG), the fluttering of the atria is best seen in leads II, III, and avF as “sawtooth” deflections between the QRS complexes. Medications such as adenosine, which slow atrial rates, may occasionally be used to assist in the diagnosis.

 TREATMENT: Urgent treatment of patients in AF includes cardioversion (either chemical or electrical). Radiofrequency catheter ablation of the electrical circuit in the heart that is responsible for AF eliminates the arrhythmia about 90% of the time. SEE: cardioversion.

PATIENT CARE: Patients who seek emergency care for AF should be placed in a position of rest (supine or ...

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