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Echocardiography was normal in 16\/17 IBM patients. In CMR, IBM patients had normal ejection fractions (mean LVEF 63\u2009\u00b1\u20097%) and ventricular mass. They had reduced left (mean 55 versus 88\u00a0ml) and right ventricular stroke volumes (mean 54 versus 86\u00a0ml) and increased early myocardial enhancement (pathological T1 Ratio in 44% versus 5%), as compared to age- and gender-matched controls. Since arterial hypertension was more often observed in IBM patients, hypertensive heart disease can also be causative for these changes. Late gadolinium enhancement did not differ statistically from healthy controls. There was no apparent association between elevated biomarkers, echocardiography and CMR.<\/jats:p>\n<\/jats:sec><jats:sec>\n<jats:title>Conclusion<\/jats:title>\n<jats:p>CMR revealed subtle changes in cardiac geometry and tissue characterization in IBM patients when compared to a gender- and age-matched control group. Findings in CMR indicated a higher extent of diffuse myocardial fibrosis as well as smaller left ventricular stroke volumes. 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