5.6 Tetralogy of Fallot
5.6 Tetralogy of Fallot

Tetralogy of Fallot is a complex defect which is uncommon in the horse. This anomaly has four elements: a VSD, an overriding aorta (the aortic root straddling the interventricular septum), RV outflow obstruction and RV hypertrophy. Sometimes the aorta is termed 'dextraposed' which means that the root is entirely within the RV. The cause of the RV hypertrophy may be pulmonary valve stenosis or PA hypoplasia. The latter is more common in the horse.

Related Topics

5.6.1 Haemodynamic effects

5.6.2 Clinical signs

5.6.3 Diagnosis

5.6.4 Prognosis