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*Section of Critical Care Medicine, Department of Anesthesiology, and
Section of Cardiology, Department of Internal Medicine, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire; and
Section of Cardiology, Department of Medicine, The Mercy Hospital of Pittsburgh, Pittsburgh, Pennsylvania
Address correspondence and reprint requests to Ali Al-Khafaji, MD, Dartmouth Medical School, Section of Critical Care Medicine, Dartmouth Hitchcock Medical Center, One Medical Center Dr., Lebanon, NH 03756. Address e-mail to Alkhafaji{at}hotmail.com
IMPLICATIONS: Bidirectional tachycardia is an uncommon and unique arrhythmia. It typically occurs in patients with digitalis toxicity, but it can also be associated with other causes. There has been controversy regarding the origin and the mechanism of bidirectional tachycardia. Treatment of bidirectional tachycardia involves the correction of reversible factors and the use of some antiarrhythmic medication.
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