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Biomedical subjects

K Hagel

Publications and source records attributed to K Hagel.

At least 37 records · Page 2Linked to original sources
PubMed1989

Balloon valvuloplasty of pulmonary stenosis in infants and children--co-operative study of the German Society of Pediatric Cardiology.

Balloon valvuloplasty (BVP) of pulmonary stenosis (PST) was performed in 305 infants and children in 20 heart centres of the Federal Republic of Germany. 273 patients suffered from isolated PST. Their age ranged from 3 days to 18 years (mean = 5.85 +/- 4.82 years), their weight from 2.9 to 60 kg. The pressure gradient was measured invasively in the sedated or anaesthetized child, partly by CW Doppler. BVP was performed by mono- or trefoil catheters, mostly oversized. As a result, mean pressure gradient fell from 71.7 +/- 32 mmHg before to 31.8 +/- 25 mmHg immediately after BVP (P less than 0.0001). The gradient was reduced by less than 30% in 13% of the patients, by 30-49% in 23%, and by greater than or equal to 50% in 64%. Among 33 patients with a gradient reduction of less than 30%, nine were aged less than 1 year, nine had dysplastic valves, and nine had a short-term infundibular reaction and good late results. Gradient reduction was not improved with oversized balloons and was independent of the initial gradient. Follow-up for a mean 11.2 +/- 8 months showed a further slight improvement, probably due to regression of infundibular hypertrophy. In the whole group we observed infundibular reaction in 12%, serious complications with one late death in 4%. From the start, BVP proved to be a secure and effective tool for elimination of pulmonary stenosis.

Adolescent↗
PubMed1980

[The Kleine-Levin-Critchley-syndrome. A contribution to the solution of differential diagnosis (author's transl)].

The typical symptoms of the so-called Kleine-Levin-Critchley-Syndrome are described according to our own observation of four selected patients (one woman, three men) on the background of the literature on the subject. In contrast to the first descriptions we characterise this syndrome by the Trias: periodic hypersomnia, vegetative disturbances (especially of food intake) and psychopathologic symptoms. Especially young men in their second decade of life suffer from this syndrome. As far as women are concerned the disease is found more seldom but the authors are sure that it exists. A spontaneous remission of the periodically proceeding disease often occurs in the third decade of life. In analogy to the respective literature a retardation of the EEG during the course of the disease going along with otherwise inconspicuous neurology was observed by the authors. Polygraphic-EEG studies are seldom. The cause of the syndrome is still open to question. Our observation show that a primarily disposition-linked and a secondarily acquisition-linked form can be assumed. Good effects are put down to amphetamines used for therapy. As far as differential diagnosis is concerned infections and abusus must be excluded.

Adolescent↗