Overall, the higher correlation coefficient was found between native T1 and interstitial fibrosis fraction from MRI ( Fig 3B ), however this did not reach statistical significance ( P = 0.07).
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Differentiation and quantification of fibrosis, fat and fatty fibrosis in human left atrial myocardium using ex vivo MRI.
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a negative trendP = 0.14
Native mean T1 values presented a significant and positive correlation with interstitial histological fibrosis fraction (r = 0.71, P = 0.03) but not with total histological fibrosis (r = 0.28, P = 0.46) and a negative trend of correlation with fatty fibrosis (r = -0.53, P = 0.14) and fat histological fraction (r = -0.60, P = 0.09) ( Fig 3E and 3H ).
Indeed, highly significant correlations were found for the aforementioned tissue components when comparing MRI quantitative measurements to histology.