Abstract
Thyrotoxic periodic paralysis (TPP) is a rare but potentially life-threatening muscle disease in a thyrotoxic patient. Due to the lack of knowledge, the diagnosis is easily missed. Diagnosis of TPP is made by documentation of hypokalemia and hyperthyroidism in acute generalized muscle weakness. Hypokalemia is caused by an intracellular shift of potassium because of an increased Na-K-ATPase pump activity and the inhibition of the inward rectifying potassium (Kir) channels. The initial treatment aims to treat potentially life-threatening cardiac arrhythmias caused by severe hypokalemia. This can be done with potassium substitution and nonselective beta-blockers, being aware of the potential of rebound hyperkaliemia. Definitive treatment consists of avoiding triggers and correcting the hyperthyroid state with antithyroid drugs, radioactive iodine, or thyroidectomy. Once patients are, permanently euthyroid complete remission of the paralytic attacks usually occurs. We present a case of a 37-year-old male with diffuse muscle weakness after surgery. A new diagnosis of thyrotoxic periodic paralysis was made in the emergency department. This review summarizes the epidemiology, clinical manifestations, pathogenesis, diagnostics, and treatment of TPP.
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