[Mitral atresia. Anatomical aspects].

This study is devoted to a series of 30 anatomical cases of mitral atresia. The left atrium was dilated in 5 cases and hypoplastic in 25. The interatrial ostium was small in 50% of the hearts.

Double outlet right ventricle associated with common atrioventricular canal: report of nine anatomic specimens.

Double outlet right ventricle associated with complete atrioventricular (AV) canal is a rare malformation. Nine cases are reported. In this abnormality the anterior AV leaflet is undivided and free floating and the aortic and pulmonary orifices are in the same frontal plane.

[Pseudoxanthoma elasticum with aortic insufficiency and arterial hypertension in a 12-year-old boy].

Hypertension was found in a 12 year-old Tunisian boy in the weeks following an aortic valvular replacement for aortic regurgitation which was surmised to be rheumatic in origin. In fact, the hypertension and aortic regurgitation were due to the Gröenblad-Strandberg syndrome, or pseudoxanthoma elasticum. The origin of the hypertension was demonstrated by selective renal angiography which showed interruption of the distal cortical renal arteries.

[Acute infectious myocarditis (author's transl)].

Among the primary myocardiopathies resulting from a known cause, acute infectious myocarditis plays an important part. This condition, usually interstitial myocarditis of viral etiology, occurs predominantly in the infant under two years of age. They are characterized by a hypotrophic hypokinetic myocardiopathy which is very hard to differentiate from endocardial fibroelastosis.