Latent tuberculosis infection associates with cardiac involvement in patients with sarcoidosis

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Els Beijer
Annelies Bakker
Raisa Kraaijvanger
Bob Meek
Marco Post
Jan Grutters
Marcel Veltkamp

Keywords

Sarcoidosis, Cardiac sarcoidosis, Mycobacteria, Tuberculosis

Abstract

Background


Sarcoidosis is a systemic disease characterized by formation of non-caseating granulomas. About 5% of patients have symptoms of cardiac sarcoidosis. Identification of cardiac involvement is important since it is a major cause of death. Mycobacterial antigens have been linked to sarcoidosis pathogenesis. Previous findings suggest that a latent tuberculosis infection (LTBI) might associate with development of cardiac involvement in patients with sarcoidosis. The aim of the present study was to confirm these results.


Methods


Interferon release assays (IGRAs) or tuberculin skin tests (TST) were analysed in a cohort of cardiac sarcoidosis patients (n=103) and compared to non-cardiac sarcoidosis patients (n=153).


Results


Of the cardiac patients, 7 had a positive IGRA or TST (6.8%) compared to only one of the non-cardiac patients (0.7%), p=0.008.


Conclusions


To conclude, we confirmed the association between a LTBI and cardiac involvement in patients with sarcoidosis. Future research is however required to unravel the mechanism involved in this association.

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