Electrocardiographical case. Young man with generalised myalgia.
A 24-year-old man presented with generalised malaise and myalgia for three days. He presented to the Emergency Department after a fall at his workplace due to weakness. 12-lead electrocardiogram (ECG) showed normal sinus rhythm with ST depression in the leads V4 to V6, with a U wave. The tallest U wave appeared in V3. These ECG features are characteristic of hypokalaemia. ECG changes in hypokalaemia and differential diagnosis are discussed. A second case of thyrotoxic periodic paralysis with similar ECG changes of hypokalaemia is also presented.
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Department of Emergency Medicine, Singapore General Hospital, Outram Road, Singapore 169608. Adeline_ngo@singhealth.com.sg
Lim
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Charles
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Goh
S H
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D000328:Adult; D003937:Diagnosis, Differential; D004562:Electrocardiography; D005221:Fatigue / Q000209:etiology; D006801:Humans; D007008:Hypokalemia / Q000150:complications* / Q000175:diagnosis*; D008297:Male; D009135:Muscular Diseases / Q000209:etiology*; D010146:Pain / Q000209:etiology*