False positive elevation of cardiac troponin I in seropositive rheumatoid arthritis.
Cardiac troponin I is a sensitive and specific biochemical marker for the diagnosis of acute myocardial injury. We describe a patient with seropositive rheumatoid arthritis (RA) in whom troponin I, measured with a microparticle enzyme immunoassay, was elevated falsely in the absence of acute myocardial infarction. Apparent elevation of troponin I concentration should be evaluated with care in patients with seropositive RA.
Katwa
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Department of Internal Medicine, University of Missouri-Columbia, Harry S. Truman Memorial Veterans Hospital, 65212, USA.
Komatireddy
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G
Walker
S E
SE
D000368:Aged; D001172:Arthritis, Rheumatoid / Q000276:immunology*; D005189:False Positive Reactions; D006801:Humans; D007118:Immunoassay / Q000379:methods; D008297:Male; D009203:Myocardial Infarction / Q000175:diagnosis; D009206:Myocardium / Q000378:metabolism; D012217:Rheumatoid Factor / Q000097:blood; D019210:Troponin I / Q000097:blood*
D019210:Troponin I; D012217:Rheumatoid Factor