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Discrete subaortic stenosis in adults: increased prevalence and slow rate of progression of the obstruction and aortic regurgitation

^a Adult Congenital Heart Disease Unit, Hospital Universitario La Paz, Madrid, Spain

View larger version (27K): [in a new window]   Figure 1 Mean age and left ventricular outflow tract obstruction (LVOTO) in naturally surviving patients with isolated discrete subaortic stenosis (non-CHD) or discrete subaortic stenosis associated with other congenital heart disease (CHD).

View larger version (20K): [in a new window]   Figure 2 Relationship between left ventricular outflow tract obstruction (LVOTO) and age in 93 adult patients with discrete subaortic stenosis who survived naturally.

View larger version (28K): [in a new window]   Figure 3 Mean left ventricular outflow tract obstruction (LVOTO) in patients with discrete subaortic stenosis who survived naturally, classified into three groups: <25 years old, 25 to 50 years old and >50 years old.

View larger version (25K): [in a new window]   Figure 4 Comparison between baseline (initial) and follow-up left ventricular outflow tract obstruction (LVOTO) in patients 50 years old or <50 years old.

View larger version (36K): [in a new window]   Figure 5 Comparison of the grades of aortic regurgitation (AR) (solid portion = grade 3; gray portion = grade 2; light portion = grade 1) between patients with discrete subaortic stenosis repaired before 15 years old (group C) and patients who survived naturally (groups A and B).

View larger version (94K): [in a new window]   Figure 6 Multiplane transesophageal echocardiography in a patient with discrete subaortic stenosis and severe hypertrophy of the interventricular septum (IVS). Arrows show discrete membranous stenosis under the aortic valve (AV). LA = left atrium; LVOT = left ventricular outflow tract; RV = right ventricle.