Myocardial revascularization by CO2 laser.

An original method of myocardial revascularization using CO2 laser has been studied in a pig model with acute myocardial infarction. Transparietal channels were created by myocardial vaporization, using a CO2 laser beam. A comparative evaluation was made against a control group using as parameters survival rate, ECG changes, anatomopathologic findings, and angiographic studies.

[Surgical treatment of aortic subvalvular obstruction. Experimental study of a new approach].

The aortic subvalvular region is difficult to approach. The results after resection through a pure transaortic approach are often unsatisfactory. An aorto-septal approach derived from the Konno-Rastan aortoventriculoplasty was experimented in animals.

Surgical transposition of the atria: A new procedure for repairing transposition of the great vessels.

The proposed procedure consists of interchanging the positions of the atria by means of an incision used in heart transplantation. After frontal sectioning of the atrial body, the heart is turned up on its pedicle, the interatrial septum is divided in its posterior part, and the vena cavae are extensively freed from their mediastinal and diaphragmatic attachments. The posterior parts of the atria can then be transposed: the right atrium and vena cava are repositioned to the left of the left atrium, and a new septum is constructed by joining the external atrial walls.

[Experimental study of a biodegradable micro-arterial prosthesis (author's transl)].

An experimental study of a micro-arterial prosthesis prepared from biological materials was carried out in the rat. The results obtained after two months were analysed in terms of permeability of the biochemical constituants of the vessel and of the neighbouring scar tissue, and endothelial healing. These studies showed the association with a process of proteolysis of the implanted vessel, of a process of reconstruction.