A case of sporadic hypokalemic Periodic Paralysis with sinus Bradycardia

AUTHORS

M Masomi 1 , * , HA Ebrahimi 1

AUTHORS INFORMATION

1 Iran

ARTICLE INFORMATION

Journal of Kermanshah University of Medical Sciences: 7 (3); e81265
Published Online: December 19, 2003
Article Type: Case Report
Received: July 10, 2003
Accepted: December 05, 2003

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Abstract

Background & Objective:  Periodic Paralyses are a group of rare disorders that cause temporary episodes of muscle weakness or paralysis.  Hypokalemic periodic paralysis usually is transmitted by an autosomal dominant trait with more penetration in men.  Hypokalemic periodic paralysis may be secondary to thyrotoxicosis, hyperparathyroidism, drug  toxicity and potassium losing states. Sporadic form of disease is rare and appears in male gender.

Case report: This case is a 34 years old man with history of periodic paralysis. 

There was  hypokalemia (k=1.98meq/lit), but other laboratory tests and paraclinical data were normal. First electrocardiogram had ST segment depression, negative T wave and positive U wave with sinus bradycardia (heart rate was  45 beats per minute). Changes Discussion: of ST segment, T wave and U wave are common but sinus bradycardia is rare. Limb paralysis and electrocardiogram changes disappeared with ingestion of 6 gram KCL. Therefore in hypokalemic periodic paralysis cardiac arrhythmia can appear as sinus bradycardia that disappears with administration of  oral potassium. Cardiac evaluations using ECGs and monitoring should be performed on all hospitalized patients with hypokalemic periodic paralysis .

Keywords

Hypokalemic periodic paralysis hypokalemia sinus bradycardia Sporadic potassium

© 2003, Journal of Kermanshah University of Medical Sciences. This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/) which permits copy and redistribute the material just in noncommercial usages, provided the original work is properly cited.
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