title: Flail subaortic membrane mimicking left ventricular outflow tract obstruction in hypertrophic cardiomyopathy.
abstract: A subaortic membrane is an uncommon cause for left ventricular outflow tract obstruction. Hypertrophic cardiomyopathy with dynamic left ventricular outflow tract obstruction would mask the presence of the subaortic membrane on transthoracic echocardiography and cause a false diagnosis. We report a patient with subaortic stenosis due to flail subaortic membrane misdiagnosed as obstructive hypertrophic cardiomyopathy on transthoracic echocardiography, identified on transesophageal echocardiography and cardiac catheterization.
authors.affiliation: Regional Cardiovascular Center, Department of Internal Medicine, Chungnam National University Hospital, Chungnam National University School of Medicine, Daejeon, Korea.
authors.forename: Kye Taek
authors.initials: KT
authors.lastname: Ahn
authors.forename: Young Dal
authors.initials: YD
authors.lastname: Lee
authors.forename: Ung-Lim
authors.initials: UL
authors.lastname: Choi
authors.forename: Seon-Ah
authors.initials: SA
authors.lastname: Jin
authors.forename: Soo-Jin
authors.initials: SJ
authors.lastname: Park
authors.forename: Jun-Hyeong
authors.initials: JH
authors.lastname: Kim
authors.forename: Jae-Hyeong
authors.initials: JH
authors.lastname: Park
authors.forename: Jae-Hwan
authors.initials: JH
authors.lastname: Lee
authors.forename: Si Wan
authors.initials: SW
authors.lastname: Choi
authors.forename: Jin-Ok
authors.initials: JO
authors.lastname: Jeong
keywords: Hypertrophic cardiomyopathy; Subaortic membrane; Transesophageal echocardiography