Inappropriate sinus tachycardia causes

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

The cause of inappropriate sinus tachycardia is unknown. It is a diagnosis of exclusion after all the specific physiological and psychological triggers of sinus tachycardia have been excluded. The diagnosis of IST is based on the presence of a persistent and recurrent sinus tachycardia on EKG that is otherwise unexplainable.

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