[Acute dissection of the thoracic aorta. Proposal of a new surgical technic].

Acute aortic dissection is a challenging surgical disease. Replacement of the supracoronary aorta alone can be followed by recurrent aneurysm formation at the level of the residual aortic root. The Bentall procedure prevents this late complication but intraoperative haemorrhage may be severe and valve replacement is always mandatory. A new surgical technique is presented which has been adopted in seven consecutive patients with no deaths. With this procedure, strengthening of the aortic root is obtained by inserting three Dacron Double Velour patches "between" the internal and external aortic lamina, one for each sinus of Valsalva. The patches override the coronary ostia which are left wide patent, and are anchored directly to the aortic anulus by single mattress sutures which reduce the size of the anulus. Suspension of the valve leaflets to the patches overriding each other at the commissures together with anuloplasty reestablish valve continency. The two aortic stumps are secured with running sutures over the free edge and a tubular Dacron graft is then anastomosed to them. The procedure reinforces the aortic root, will prevent recurrent aneurysm formation and avoids at the same time valve replacement, when unnecessary, and coronary arteries reimplantation.