[Subvalvular aortic stenosis. Apropos of 3 cases].

The three cases reported here illustrate the most frequent varieties of infra-valvular congenital aortic stenosis secondary to a fixed obstacle: such as a thin membrane located a few millimeters under the aortic ring; such as a fibro-muscular membrane at some distance of the ring; such as an infra-aortic fibro-muscular tunnel. The clinical symptoms and evolutive risks are reviewed. Ultrasound cardiography enables to make an accurate diagnosis and evaluate the associated lesions.

[Bicarbonate dialysis: comparative study of its long-term effects].

Changes in blood bicarbonate, phosphate and lipid were followed up on 9 patients as they are dialyzed with an acetate containing dialysate (AC) during 2 years and with a bicarbonate containing dialysate (BC) during 2 more years. The mean (+/- SD) predialysis concentration of blood bicarbonate was 23.11 +/- 1.

Effect of bicarbonate-containing dialysate on chronic hemodialysis patients: a comparative study.

Changes in pH and blood gases were studied during hemodialysis with both acetate and bicarbonate dialysates. During acetate dialysis, PaO2 and PaCO2 decreased significantly (P less than 0.05) from 101 +/- 2 to 93 +/- 3 mmHg and from 34.