Illustration demonstrating an open-heart surgery to repair a mitral valve that is narrowed from mitral valve stenosis.

A commissurotomy (i/) is a surgical incision of a commissure in the body, as one made in the heart at the edges of the commissure formed by cardiac valves, or one made in the brain to treat certain psychiatric disorders.

Patients with scleroderma, a disease that thickens and hardens the skin, sometimes require oral commissurotomy to open the corners of the mouth, the commissures, to allow dental treatment. This procedure often leaves characteristic scars.

In cardiac valves

Commissurotomy of cardiac valves is called valvulotomy,[1] and consists of making one or more incisions at the edges of the commissure formed between two or three valves, in order to relieve constriction such as occurs in valvular stenosis, especially mitral valve stenosis.

Other Languages
العربية: بضع الصوار
español: Comisurotomía
italiano: Commissurotomia
svenska: Kommisurotomi