Myopericarditis is a rare extraintestinal complication of inflammatory bowel 
disease (IBD). It has also been described as a side-effect of the treatment of 
IBD. We report a 37-year-old-woman with Crohn's disease who had several mild 
episodes of myopericarditis, two of which were associated with a pleural 
effusion, and two with conduction abnormalities in the atrioventricular node. 
During the last episode, a nodal rhythm was followed by a third-degree 
atrioventricular block and a prolonged pause, resulting in loss of consciousness 
and convulsions. A permanent pacemaker was implanted. Our patient is also human 
lymphocyte antigen (HLA) B27-positive. HLA B27 is known to be associated with 
conduction disturbances in the AV node. Recurrent myopericarditis can be a sign 
of IBD.