Right ventricular outflow tract obstruction pulmonary subvalvular stenosis

Right ventricular outflow tract obstruction Microchapters
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor-In-Chief: Cafer Zorkun, M.D., Ph.D. [2]; Associate Editor-in-Chief: Keri Shafer, M.D. [3]

Anatomy

• There is hypertrophy of the infundibular muscle causing obstruction.

• The isolated form is rare, more commonly develops in response to an underlying VSD.

Clinical Features

• Similar to valvar pulmonic stenosis. </ref>
• Aortic stenosis was probably first described by Lazare Riviere (1589-1655), a French physician in 1663.

• No poststenotic dilation of the pulmonary artery in contrast to valvar pulmonic stenosis.