RT Journal Article SR Electronic T1 False positive elevation of cardiac troponin I in seropositive rheumatoid arthritis. JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 2750 OP 2751 VO 28 IS 12 A1 G Katwa A1 G Komatireddy A1 S E Walker YR 2001 UL http://www.jrheum.org/content/28/12/2750.abstract AB 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.