case_images: PMC6524425_01
case_images: Electrocardiogram showing left ventricular hypertrophy
case_images: HV-20-21-g001.jpg
case_images: PMC6524425_01_HV-20-21-g001.jpg
case_images: F1
case_images: Electrocardiogram showed LV hypertrophy [Figure 1].
case_images: Transesophageal echocardiography showing supravalvular membrane (marked by arrow)
case_images: HV-20-21-g002.jpg
case_images: PMC6524425_01_HV-20-21-g002.jpg
case_images: F2
case_images: The membrane was confirmed on transesophageal echocardiography [Figure 2].
case_images: Left ventricular pressure before balloon dilatation. Left ventricular systolic pressure was 236 mm Hg
case_images: HV-20-21-g003.jpg
case_images: PMC6524425_01_HV-20-21-g003.jpg
case_images: F3
case_images: Cardiac catheterization showed systolic LV pressure of 236 mmHg [Figure 3].
case_images: Aortic pressure before balloon dilatation. Aortic pressure was 106/60 mmHg
case_images: HV-20-21-g004.jpg
case_images: PMC6524425_01_HV-20-21-g004.jpg
case_images: F4
case_images: The aortic systolic pressure was 106 mmHg [Figure 4].
case_images: Left ventriculogram (in the left anterior oblique/cranial view) showing membrane at the sinotubular junction
case_images: HV-20-21-g005.jpg
case_images: PMC6524425_01_HV-20-21-g005.jpg
case_images: F5
case_images: The position of the membrane was confirmed on left ventriculogram [Figure 5].
case_images: Balloon dilatation of the membrane with TYSHAK 16 mm x 40 mm balloon
case_images: HV-20-21-g006.jpg
case_images: PMC6524425_01_HV-20-21-g006.jpg
case_images: F6
case_images: TYSHAK 16 mm x 40 mm balloon was used based on the measurement of aortic annulus [Figure 6].
case_images: Left ventricular systolic pressure after the procedure. Left ventricular systolic is 130 mmHg
case_images: HV-20-21-g007.jpg
case_images: PMC6524425_01_HV-20-21-g007.jpg
case_images: F7
case_images: After inflation, LV systolic pressure reduced to 130 mmHg [Figure 7] and systolic aortic pressure was 116 mmHg with gradient reduced to 14 mmHg from 130 mmHg.