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A '''ventricular outflow tract obstruction''' is one type of [[congenital heart defect]] in which either the right or left [[ventricular outflow tract]] is blocked or obstructed. These obstructions represent a spectrum of disorders.
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===Right ventricular outflow tract obstruction===
A '''right ventricular outflow tract obstruction''' (RVOTO) may be due to a defect in the [[Pulmonary valve|pulmonic valve]], the supravalvar region, the [[Conus arteriosus|infundibulum]], or the pulmonary artery.<ref>{{cite journal |authors=Bashore TM |journal=Circulation |title=Adult congenital heart disease: right ventricular outflow tract lesions |year=2007 |volume=115 |issue=14 |pages=1933–1947 |pmid=17420363 |doi=10.1161/CIRCULATIONAHA.105.592345|doi-access=free }}</ref>
* [[Pulmonary atresia]]
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* [[Hypoplastic right heart syndrome]]
* [[Tetralogy of Fallot]]
===Left ventricular outflow tract obstruction===
A '''left ventricular outflow tract obstruction''' (LVOTO) may be due to a defect in the [[aortic valve]], or a defect located at the subvalvar or supravalvar level.<ref>{{cite journal |authors=Gaynor JW, Elliott MJ |journal=Journal of Heart Valve Disease |title=Congenital left ventricular outflow tract obstruction |year=1993 |volume=2 |issue=1 |pages=80–93 |pmid=7505702 }}</ref>
* [[Aortic valve stenosis]]
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