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[Transluminal dilatation of critical aortic stenosis and coarctation of a newborn infant aorta].

We present a 20-day-old male infant with severe congestive heart failure. Echocardiography showed left ventricular hypertrophy secondary to critical aortic valve stenosis and severe coarctation of the aorta. The size of aortic annulus valve was 5.2 mm. At catheterization, the gradient of aortic valve stenosis was 104 mmHg and the gradient through aortic coarctation, measuring 14 mm in diameter, was 58 mmHg. Transverse and isthmic aorta showed moderate hypoplasia. After two dilatation procedures performed at an interval of 45 days, the pressure valve gradient decreased to 32 mmHg, that of the coarctation of the aorta decreased to 14 mmHg and the diameter increased to 5.4 mm.