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Biomedical subjects

C Hahn

Publications and source records attributed to C Hahn.

At least 19 recordsLinked to original sources
PubMed1979

[Tetralogy of Fallot: results of 77 hemodynamic controls after complete correction].

77 patients (representing 91% of all survivors) underwent catheterization within 5 months of surgical repair of tetralogy of Fallot. The data show that residual pulmonary gradient is significantly higher in patients with infundibular and valvular stenoses than in patients with infundibular stenoses only, whereas the method of intracardiac repair (patch) had no influence on residual gradient. Significant pulmonary insufficiency was found almost exclusively when a patch was extended through the pulmonary annulus. Hemodynamic results were excellent in 37% of cases, good in 51%, satisfactory in 3% and unsatisfactory in 9%. Finally, primary intracardiac repair in children below 4 years of age yielded excellent or good results in all cases: this suggests that toal correction should be performed without previous aorto-pulmonary anastomoses in this youngest group of patients.

Cardiopulmonary Bypass↗
PubMed1979

[Permeability of venous aortocoronary bypass 5 years later].

47 consecutive patients who had undergone aorto-coronary venous bypass surgery (mean: 1.6 graft per patient) have been investigated after a mean follow-up period of 5 years and 9 months (range: 44-108 months). 52 grafts out of 73 were found to be patent (71 p. 100), the best patency rate being shown by grafts on the LAD artery (27/32 = 85 p. 100). Long-term graft patency may be associated with an improved left ventricular ejection fraction; 77 p. 100 of the total patients experienced a lasting clinical benefit from the operation.

Adult↗
PubMed1979

[Drainage in surgery of the heart and great vessels].

Based upon some recent experience with pericardial drainage a comparison is established between the surgical procedure and the needle-punction; the best approach to the pericardium, depending on the nature of the effusion is described. In the second part, the value of various types of drainage used since 19 years in the cardiac surgery is reviewed on the basis of our own experience with more than 7000 cases.

Adult↗
PubMed1978

Surgical techniques.

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Coronary Artery Bypass↗
PubMed1978

[Complete surgical correction of congenital cardiopathies in infants].

The results of total correction of congenital heart defects in the first year of life are presented. Overall surgical mortality in these generally highly symptomatic infants was 35%. The surgical risk is mainly related to the type of defect: mortality is low (10%) in uncomplicated septal defects and in transpositions of the great vessels, higher in the coarctation syndromes (30%), and considerable in complex heart defects. The weight of the infant seems to be another factor, surgical mortality being high when the patient's weight is less than 4.5 kg. Indications for palliative operation or total repair are discussed on the basis of the presented results.

Aortic Coarctation↗
PubMed1977

[Aldosterone and renin in liver cirrhosis with ascites].

Supine plasma aldosterone and plasma renin activity were determined in patients with cirrhosis of the liver and ascites (n = 10). Most of the patients initially showed an increase in plasma aldosterone and plasma renin activity. However, values within the normal range were observed (plasma aldosterone, n = 3; plasma renin activity, n = 4). In the ascitic fluid renin activity could not be detected, whereas aldosterone concentrations correlated significantly with the respective plasma levels (r = 0.8, p less than 0.01). During therapy with spironolactone alone (n =2) or in combination with furosemide (n = 4), diuresis and natriuresis showed no correlation with changes in plasma aldosterone and/or plasma renin activity. Our results suggest that other factors than renin and aldosterone secretion may be important in the formation of ascites in patients with cirrhosis of the liver. In addition, the inverse correlation between mean arterial blood pressure and plasma renin activity (r = -0.65, p less than 0.05) found in our patients supports the assumption that the increase in renin secretion is probably induced by changes in (renal) hemodynamics.

Aldosterone↗
PubMed1976

[Function improvement in levography following aortocoronary bypass].

Actively contracting segments, preoperatively akinetic, were found in 8 of 63 patients, evaluated 6-12 months after aortocoronary surgery by coronary angiography. Ejection fraction was increased from 48.1% (S.D. 15.7) to 68.3% (S.D. 11.4). These patients are characterized by two simple clinical parameters: 1. All patients had angina pectoris at rest or at minimum exercise except for one; 2. preoperatively, there was a discrepancy between severe ventriculographic and discreet Ecg findings. These findings prove that myocardial function in coronary artery disease can be impaired at rest by ischemia, without clinical signs of coronary insufficiency, such as angina pectoris. Even severe impairment of left ventricular function is no contraindication for coronary artery surgery, if caused by reversible myocardial ischemia.

Adult↗