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Serum cardiac troponin T, but not troponin I, is elevated in idiopathic inflammatory myopathies.
J Rheumatol. 2009 Dec; 36(12):2711-4.JR

Abstract

OBJECTIVE

To study the association of serum cardiac troponin T (cTnT) and cardiac troponin I (cTnI) with creatine kinase (CK) in patients with idiopathic inflammatory myopathies (IIM).

METHODS

We performed a retrospective study on patients with IIM followed by the rheumatology service of a county hospital from 2004 to 2008. Patients with myocardial ischemia and/or with renal failure were excluded. Clinical data including electromyogram, muscle biopsy, and CK, cTnT and cTnI were recorded. Patients who had simultaneous analysis of CK and cardiac troponin (cTnT or cTnI) levels were studied. CK levels were correlated with cTnT and cTnI by chi-square test and Spearman correlation.

RESULTS

We identified 49 patients with IIM (69 observations) who satisfied our inclusion criteria. The primary diagnosis was polymyositis in 23, dermatomyositis in 16, and myositis associated with connective tissue disease in 10 patients. There were 33/49 women with average age 45.8 years. Twenty-eight patients with IIM had simultaneous CK and cTnT values assayed. Of those patients, 18/23 with elevated CK also had elevated cTnT, and 5/5 patients with normal CK levels had normal cTnT levels (p = 0.005). In 41 patients with IIM who had simultaneous CK and cTnI levels assayed, only 1/29 with elevated CK had elevated cTnI, and 12/12 patients with normal CK had normal cTnI (p = 0.5). CK correlated strongly with the cTnT (r = 0.62, p = 0.001) but did not correlate with cTnI.

CONCLUSION

Elevated cTnT, but not cTnI, was highly associated with CK in patients with IIM despite the absence of myocardial ischemia.

Authors+Show Affiliations

Rush University Medical Center; and John Stroger, Jr Hospital of Cook County, Chicago, Illinois 60612, USA.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

19833747

Citation

Aggarwal, Rohit, et al. "Serum Cardiac Troponin T, but Not Troponin I, Is Elevated in Idiopathic Inflammatory Myopathies." The Journal of Rheumatology, vol. 36, no. 12, 2009, pp. 2711-4.
Aggarwal R, Lebiedz-Odrobina D, Sinha A, et al. Serum cardiac troponin T, but not troponin I, is elevated in idiopathic inflammatory myopathies. J Rheumatol. 2009;36(12):2711-4.
Aggarwal, R., Lebiedz-Odrobina, D., Sinha, A., Manadan, A., & Case, J. P. (2009). Serum cardiac troponin T, but not troponin I, is elevated in idiopathic inflammatory myopathies. The Journal of Rheumatology, 36(12), 2711-4. https://doi.org/10.3899/jrheum.090562
Aggarwal R, et al. Serum Cardiac Troponin T, but Not Troponin I, Is Elevated in Idiopathic Inflammatory Myopathies. J Rheumatol. 2009;36(12):2711-4. PubMed PMID: 19833747.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Serum cardiac troponin T, but not troponin I, is elevated in idiopathic inflammatory myopathies. AU - Aggarwal,Rohit, AU - Lebiedz-Odrobina,Dorota, AU - Sinha,Alpana, AU - Manadan,Augustine, AU - Case,John P, Y1 - 2009/10/15/ PY - 2009/10/17/entrez PY - 2009/10/17/pubmed PY - 2010/2/6/medline SP - 2711 EP - 4 JF - The Journal of rheumatology JO - J Rheumatol VL - 36 IS - 12 N2 - OBJECTIVE: To study the association of serum cardiac troponin T (cTnT) and cardiac troponin I (cTnI) with creatine kinase (CK) in patients with idiopathic inflammatory myopathies (IIM). METHODS: We performed a retrospective study on patients with IIM followed by the rheumatology service of a county hospital from 2004 to 2008. Patients with myocardial ischemia and/or with renal failure were excluded. Clinical data including electromyogram, muscle biopsy, and CK, cTnT and cTnI were recorded. Patients who had simultaneous analysis of CK and cardiac troponin (cTnT or cTnI) levels were studied. CK levels were correlated with cTnT and cTnI by chi-square test and Spearman correlation. RESULTS: We identified 49 patients with IIM (69 observations) who satisfied our inclusion criteria. The primary diagnosis was polymyositis in 23, dermatomyositis in 16, and myositis associated with connective tissue disease in 10 patients. There were 33/49 women with average age 45.8 years. Twenty-eight patients with IIM had simultaneous CK and cTnT values assayed. Of those patients, 18/23 with elevated CK also had elevated cTnT, and 5/5 patients with normal CK levels had normal cTnT levels (p = 0.005). In 41 patients with IIM who had simultaneous CK and cTnI levels assayed, only 1/29 with elevated CK had elevated cTnI, and 12/12 patients with normal CK had normal cTnI (p = 0.5). CK correlated strongly with the cTnT (r = 0.62, p = 0.001) but did not correlate with cTnI. CONCLUSION: Elevated cTnT, but not cTnI, was highly associated with CK in patients with IIM despite the absence of myocardial ischemia. SN - 0315-162X UR - https://www.unboundmedicine.com/medline/citation/19833747/Serum_cardiac_troponin_T_but_not_troponin_I_is_elevated_in_idiopathic_inflammatory_myopathies_ L2 - http://www.jrheum.org/cgi/pmidlookup?view=long&pmid=19833747 DB - PRIME DP - Unbound Medicine ER -