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Improvement of the exercise test after therapy in thyrotoxic periodic paralysis
Author(s) -
Jackson Carlayne E.,
Barohn Richard J.
Publication year - 1992
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.880151002
Subject(s) - thyrotoxic periodic paralysis , euthyroid , medicine , periodic paralysis , paralysis , hypokalemic periodic paralysis , physical therapy , compound muscle action potential , pediatrics , physical medicine and rehabilitation , cardiology , surgery , electrophysiology , thyroid
The diagnosis of periodic paralysis (PP) can be aided by demonstrating a decrease in compound motor action potential (CMAP) amplitude after several minutes of exercise. We report a case of secondary hypokalemic PP due to thyrotoxicosis in which the decrease in the CMAP amplitude after exercise dramatically improved after treatment, when a euthyroid state was achieved. The exercise test is a useful electropghysiologic means of monitoring the neuromuscular status of patients with thyrotoxic periodic paralysis prior to, and after treatment of the thyrotoxicosis.