[Persistent common atrioventricular canal].


T HIS PAPER was written first in 1960. At that time cases of the complete form of persistent common atrioventricular canal or endocardial cushion defect were regarded as consisting of an ostium primum defect of the atrial septum, a cleft in the anterior cusp of the mitral valve, a cleft in the septal cusp of the tricuspid valve, and an interventricular septal defect. Partial forms of the defect had only the first two anomalies, and transitional forms had the first three. Wakai and Edwards,1 however, had pointed out that the ventricular septum showed an unusual concavity below the atrioventricular valves in the partial and transitional forms. Tissue resembling fused chordae might be seen filling a gap between this concavity and the valves. Accessory chordae tendineae between mitral cusps and the ventricular septum were held to hinder mobility of the sutured cleft and lead to persistent mitral insufficiency postoperatively.2 It was evident from clinical, hemodynamic, and surgical studies3 that not all cases had mitral insufficiency. Yet the accepted surgical treatment was complete suture of the free edges of the mitral cleft and patching of the ostium primum defect of the interatrial septum.3 Interventricular septal defects when present were closed either by means of a patch sutured to the septum and the under surface of the atrioventricular valves or by the suture of the valves down to the top of the concavity

Cite this paper

@article{Benchimol1957PersistentCA, title={[Persistent common atrioventricular canal].}, author={Alberto Benchimol and M M Anache and Rafael Dix Carneiro}, journal={Arquivos brasileiros de cardiologia}, year={1957}, volume={10 4}, pages={283-314} }