[Indications and surgical results in asymptomatic stenosis of the carotid artery].

In 101 patients 114 asymptomatic carotid stenoses were treated operatively, complicated by one lesion of hypoglossic nerve and one temporary neurologic deficit. During the follow-up period of 6-89 months cardiovascular diseases were seen in 60% of the patients. There were 9 late deaths, 5 due to myocardial infarction and 2 due to contrahemispheric cerebral ischemia.

Bilateral occlusive carotid disease: simultaneous or staged operation?

In a series of 231 carotid operations in 202 patients, 8 patients were operated on bilaterally by staged (group A), and 15 patients by simultaneous procedures (group B). Additionally 4 patients had a combined external carotid desobliteration plus extra-intracranial arterial bypass (group C), 3 of them in a simultaneous operation. Patients of the groups A and C had an uneventful recovery throughout.

[Reconstruction of the aorta in mycotic aortic aneurysm--report of two cases of salmonella infection (author's transl)].

Two patients with infected aortic aneurysm underwent surgical treatment. When using autologous tissue in place of the infected aorta a recurrent aneurysm was observed four months later. Extraanatomical bypass of the infected area with prosthetic material and consecutive removal of all infected tissue seems to be the only successful management.

[Measurement of cardiac output by impedance cardiography. Experimental studies (author's transl)].

The correlation of impedance cardiography against electromagnetic flow measurement was studied in the pig. The conditions tested were normal circulation, hypo- und hypervolemia and acute pulmonary hypertension as well as the influence of respiration and electrodes location. Correct quantification of cardiac output was obtained only in normovolemic circulation during exspiration (r = 0,96, m = 1,15, b = 0,04).

[Frequency-optimal pacing in chronic pacemaker therapy].

Hemodynamic studies were performed in 15 pacemaker patients at rest and during exercise by thermodilution technique and impedance cardiography. Particularly in myocardial failure, individual optimal heart rates were observed, ranging from 90 to 120/min. Mean increase of cardiac output at optimal pacing rate was 1.