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. 2012 Oct 12;2(5):e001267. doi: 10.1136/bmjopen-2012-001267

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Linear regression analysis between extent of fibrosis and changes in left ventricular (LV) outflow tract gradient during exercise. (A) In the overall population and (B) in patients with obstructive hypertrophic cardiomyopathy at rest. Note: the mark indicated by the arrow represents four patients who showed no late-gadolinium enhancement and an increase in LV outflow tract gradient during exercise of 50, 50, 51 and 52 mm Hg, respectively.