AVNRT laboratory findings

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

Overview

Depending upon the patient's history and demographics, the following laboratory studies should be considered:

Thyroid function tests (TFTs) - an overactive thyroid may increase the risk of AVNRT
Electrolytes - hypokalemia, hypomagnesemia may predispose to AVNRT
Cardiac markers - if there is a concern that myocardial infarction (a heart attack) has occurred either as a cause or as a result of the AVNRT; this is usually only the case if the patient has experienced ischemic chest pain