title: Conduction abnormalities in thyrotoxicosis--a report of three cases.
abstract: Cardiac arrhythmias are common in patients with thyrotoxicosis. Conduction abnormalities have been seen in a few thyrotoxic patients, but these, in particular high grade atrioventricular (AV) block, often occur in the presence of other conditions. Three thyrotoxic patients with conduction abnormalities are described: two were associated with severe hypokalaemia and the third had congestive cardiac failure. Conditions predisposing to conduction abnormality should be identified when this occurs in a thyrotoxic patient as their correction may help resolve or explain the conduction abnormality.
authors.affiliation: Faculty of Medicine, National University of Malaysia, Jalan Raja Muda, Kuala Lumpur.
authors.forename: K
authors.initials: K
authors.lastname: Yusoff
authors.forename: B A
authors.initials: BA
authors.lastname: Khalid
mesh_terms: D000328:Adult; D001282:Atrial Flutter / Q000503:physiopathology*; D001283:Atrioventricular Node / Q000503:physiopathology; D002036:Bundle of His / Q000503:physiopathology; D002037:Bundle-Branch Block / Q000503:physiopathology*; D004562:Electrocardiography; D006327:Heart Block / Q000503:physiopathology*; D006333:Heart Failure / Q000503:physiopathology; D006801:Humans; D007008:Hypokalemia / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D010245:Paralyses, Familial Periodic / Q000503:physiopathology; D012849:Sinoatrial Node / Q000503:physiopathology; D013971:Thyrotoxicosis / Q000503:physiopathology*