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tachycardia

   Also found in: Dictionary/thesaurus, Medical, Acronyms, Wikipedia, Hutchinson 0.07 sec.
tachycardia: see arrhythmia arrhythmia (ārĭth`mēə), disturbance in the rate or rhythm of the heartbeat.
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tachycardia

Heart rate over 100 (as high as 240) beats per minute. When it is a normal response to exercise or stress, it is no danger to healthy people, but when it originates elsewhere, it is an arrhythmia. Symptoms include fatigue, faintness, shortness of breath, and feeling the heart thumping. It may subside within minutes or hours with no lasting ill effects, but in serious heart, lung, or circulatory disease it can precede atrial fibrillation or heart attack and demands immediate medical attention. Tachycardias can be treated by an electric shock to the heart, by antiarrhythmic drugs, and by pacemakers.
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A recent ECG Puzzler article ("Nonsustained Ventricular Tachycardia in the Elderly," September 2006: 519-520) contained several discrepencies with the current literature.
Questioning Guidelines in the ECG Puzzler by Pelter, Michele M. / American Journal of Critical Care
There were no reports of stroke, myocardial infarction, ventricular tachycardia, torsades de pointes, or death.
Cardiovascular Safety of Vardenafil and Alpha-Blockers Combined: ... by The Journal of Sex Research
Researchers studied some 200 patients with implanted defibrillators who had recent episodes of arrythmia--either tachycardia (the heart beats abnormally fast) or fibrillation (the heart flutters, rather than beats, so it pumps little or no blood) in the ventricle, or lower heart chamber.
In a heartbeat by Nutrition Action Healthletter
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