© 2006 European Society of Cardiology
Myocardial biopsy findings and gadolinium enhanced cardiovascular magnetic resonance in dilated cardiomyopathy
Department of Internal Medicine II—Cardiology, University of Ulm Robert—Koch—Str. 8, 89081 Ulm, Germany
* Corresponding author. Tel.: +49 731 500 0; fax: +49 731 500 24442. E-mail address: oliver.zimmermann{at}medizin.uni-ulm.de
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Abstract |
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Background: In some patients suffering from dilated cardiomyopathy (DCM) magnetic resonance imaging (MRI) shows late gadolinium enhancement with variable distribution. Myocardial biopsies in DCM reveal a chronic myocardial inflammatory process in almost 50% and myocardial persistence of adenoviral or enteroviral genome in about 15% of the patients.
Aims: We prospectively investigated whether the pattern of late gadolinium enhancement correlates with myocardial biopsy findings.
Methods and results: 42 patients with DCM and 42 control subjects underwent contrast MRI. In the DCM group, endomyocardial biopsies were performed and evaluated for inflammation and viral genome.
None of the control subjects showed late gadolinium enhancement whereas in 29 DCM patients (69%) gadolinium enhancement was detectable (p<0.001). 21 of the DCM patients (50%) showed midwall septal enhancement, 7 patients (17%) showed a patchy distribution of hyperenhancement and 1 patient (2%) showed enhancement typical for ischemic heart disease. In myocardial biopsy analysis, 2 patients (5%) showed persistence of viral genome, 18 patients (43%) showed inflammation and in 22 patients (52%) neither virus nor inflammation was detected. The pattern of late gadolinium enhancement and myocardial biopsy findings were not significantly correlated (p=0.854).
Conclusion: MRI as a non-invasive technique cannot replace myocardial biopsy for the differential diagnosis of DCM.
Key Words: Dilated cardiomyopathy • Biopsy • Magnetic resonance imaging • Inflammation • Virus
Received January 25, 2005; Revised March 27, 2005; Accepted June 8, 2005
Supported in part by the Deutsche Herzstiftung.
1 These authors contributed equally.
2 Current address. Department of Cardiology, EVK Düsseldorf, Kirchfeldstraβe 40, 40217 Düsseldorf, Germany.
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