[Aneurysm of the ampulla of Galen. Anesthetic problems].

Anesthetic management of patients with arterio-venous malformations of the vein of Galen needs to be adapted to the physiopathology of the affection. Massive blood less before clipping and congestive heart failure after clipping may be avoided by using adequate transfusion and light arterial vasodilators preserving diastolic perfusion of the heart.