Inconsistent echocardiographic grading of aortic stenosis: is the left ventricular outflow tract important?
Hector I Michelena, Edit Margaryan, Fletcher A Miller, Mackram Eleid, Joseph Maalouf, Rakesh Suri, David Messika-Zeitoun, Patricia A Pellikka, Maurice Enriquez-Sarano
Heart Jul 2013, 99 (13) 921-931; DOI: 10.1136/heartjnl-2012-302881