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Vector flow mapping in obstructive hypertrophic cardiomyopathy to assess the relationship of early systolic left ventricular flow and the mitral valve. <i>J Am Coll Cardiol<\/i> 2014; 64: 1984\u20131995.","DOI":"10.1016\/j.jacc.2014.04.090"},{"key":"13","doi-asserted-by":"crossref","unstructured":"13. Bahlmann E, Gerdts E, Cramariuc D, Gohlke-Baerwolf C, Nienaber CA, Wachtell K, et al. Prognostic value of energy loss index in asymptomatic aortic stenosis. <i>Circulation<\/i> 2013; 127: 1149\u20131156.","DOI":"10.1161\/CIRCULATIONAHA.112.078857"},{"key":"14","unstructured":"14. Pedrizzetti G, La Canna G, Alfieri O, Tonti G. The vortex: An early predictor of cardiovascular outcome? <i>Nat Rev Cardiol<\/i> 2014; 11: 545\u2013553."},{"key":"15","doi-asserted-by":"crossref","unstructured":"15. Zoghbi WA, Adams D, Bonow RO, Enriquez-Sarano M, Foster E, Grayburn PA, et al. 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