The supraventricular crest is a thick muscular ridge in the right ventricle that separates the rough inflow region below the tricuspid valve from the smooth outflow tract (conus arteriosus) leading to the pulmonary valve.
| Location | Roof of the right ventricle, between the tricuspid and pulmonary valve orifices |
|---|---|
| Parts |
|
| Nerve Supply | Cardiac plexus |
| Blood Supply | Right coronary artery (conus branch); Left anterior descending artery (septal branches) |
| Venous drainage | |
| Lymphatic drainage |
|
Divides inflow from outflow in the right ventricle and helps direct blood towards the pulmonary trunk.
Malalignment of this region is central to tetralogy of Fallot, where the outflow tract is narrowed. Its muscle can thicken and obstruct outflow in some congenital heart conditions.
Congenital defect with right ventricular outflow obstruction, ventricular septal defect, overriding aorta and right ventricular hypertrophy.
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