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Summary To test the hypothesis that myocardial hyper- intensities on T2 weighted imaging in patients with hypertrophic cardiomyopathy (HCM) reflect ongoing myocardial injury, the cardiac- specific biomarker troponin T was measured by a new highly sensitive assay (hs-cTnT). In 52 patients with HCM, the presence and extent of myocardial T2 abnormalities were associated with hs-cTnT levels. The number of LV segments with T2 hyper-intesity was the strongest independent predictor of hs-cTnT levels. This novel finding suggests that T2 imaging may aid in the identification of HCM patients with active and potentially progressive disease. Background In a sub-group of patients with hypertrophic cardiomyopathy (HCM) abnormalities on T2 weighted imaging on cardiovascular magnetic resonance imaging (CMR) have been reported. The significance of this finding is still not clear, although it has been proposed to reflect ongoing myocardial injury. The loss of cardiomyocyte cell integrity leads to the release of troponins into the circulation. Recently, a highly sensitive cardiac troponin T assay (hs-cTnT) was introduced which allows the detection and quantification of very low serum levels of cTnT with a high diagnostic accuracy. We therefore aimed to test the hypothesis that the presence and extent of myocardium with increased signal intensity on T2-weighted images in patients with HCM is associated with evidence of cardiomyocyte injury as assessed by the hs-cTnT assay.

journal of cardiovascular magnetic resonance

T2 abnormalities in patients with hypertrophic cardiomyopathy characterized by cardiovascular magnetic resonance imaging- an indicator of myocardial injury as assessed by the high sensitive cardiac troponin T assay