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Biomedical subjects

F Zekert

Publications and source records attributed to F Zekert.

At least 37 records · Page 2Linked to original sources
PubMed1977

[Prevention of thromboembolism with antiaggregants (author's transl)].

Experimental investigations have shown that antiaggregants affect the size rather than the rate of venous thrombosis, while clinical trials with prophylactic acetylsalicylic acid have indicated primarily a reduced incidence of pulmonary embolism. Current experiences with acetylsalicylic acid in combination with dipyridamole or low-dose heparin suggest that the incidence of pathology diagnosed by 125I-fibrinogen and of deep vein thrombosis is equally reduced.

Animals↗
PubMed1976

[Thrombosis, embolism and aggregation inhibitors in surgery].

The frequency in letal pulmonary embolism at the I. Chirurgische Univ.-Klinik and the Unfallchirurgie I, Vienna, and experimental and clinical studies of the protective effect of aggregation inhibitors are reported. Significant difference of extent in experimentally induced venous thrombosis was found in animal groups with and without preventive treatment. Two double-blind trials with acetylsalicylic acid and placebo brought significant differences in the frequency of letal pulmonary embolism in patients with hip fracture and a lower rate of immediate post-operative vascular reobstruction due to high peripher vascular resistance in patients undergoing vascular surgery.

Aged↗
PubMed1976

[The influence of vitamin a, gentamicin and anoxaemia on urinary enzyme excretion (author's transl)].

The excretion patterns of several urinary enzymes were investigated in the following four experimental groups of Wistar rats and compared with the normal range of each urinary enzyme studied. One group received vitamin A in high dosage; a second group was given vitamin A before and after bilateral clamping of the renal artery for 30 minutes; in the third group the renal arteries were clamped for 30 or 60 minutes; the last group of experimental animals received first low (2mg/kg, 4mg/kg) and subsequently high doses (100 mg/kg) of gentamicin. Vitamin A administration produced no increase in urinary enzyme activity, even in the group of rats with ischaemically-damaged kidneys, where ischaemia (clampin of the arteries) was responsible per se for an increase in enzyme excretion. With low doses of gentamicin the urinary enzymes remained within normal limits, but increased immediately to significantly pathological values after the first dose 100 mg/kg gentamicin.

Animals↗
PubMed1976

[Prophylactic effect of isosorbide dinitrate on postoperative cardiac complications (author's transl)].

Isosorbide dinitrate (ISD) was administered before, during and after 178 operations performed on 127 patients with arterial occlusive disease. Its influence on postoperative myocardial infarction, heart failure and mortality was tested by comparison with 188 operations performed on 140 patients with hypertension and/or old myocardial infarction receiving no ISD prophylaxis. Risk of cardiac complications was similar in both groups. Mortality in the ISD-treated group was significantly lowered as compared with the control group and was about half of the overall mortality in patients with arterial occlusive disease operated on at our hospital over the past 10 years. This difference depended partly on the influence of ISD on cardiac complications. Post-operative myocardial infarction during ISD prophylaxis occurred in 0.6% of cases as compared with 3.7% in the control group (p less than 0.05), whilst the respective values for postoperative heart failure were 5.7% and 18.2% (p less than 0.001). Both complications are related to absolute or relative hypoxia during the post-operative stress period. ISD is effective by lowering cardiac preload and afterload and thereby diminishing myocardial oxygen demand. ISD is the drug of choice for surgical patients since it provides a steady and long-lasting effect after sublingual absorption. ISD prophylaxis during the perioperative period is indicated in cases with coronary artery disease and with increased cardiac preload or afterload.

Arterial Occlusive Diseases↗
PubMed1976

[Urinary enzymes in the early detection of rejection reactions after renal transplantation (author's transl)].

Urinary enzymes were studied in 15 patients subjected to kidney transplantation. The investigation was initiated immediately after operation and was continued for a period of between 2 and 8 weeks. There was a significant increase in urinary MDH activity in 94.2% of cases, of LDH activity in 95,65% and of gamma-GT activity in 95,17% of the cases. This detected increase in urinary enzyme activities preceded the clinical diagnosis of rejection by activities preceded the clinical diagnosis of rejection by at least 24 hours. Determination of these enzymes provides a reliable tool for the early detection of rejection crises.

Enzymes↗
PubMed1975

[Risk factors in postoperative myocardial infarction].

Myocardial infarction after major surgery occurred 25 times in 214 patients who had previously sustained infarcts. Analysis of data obtained before, during and after 335 operations in these patients revealed the following pathogenetic factors in the infarction: (1) The patient with the highest coronary risk had arterial hypertension of at least 160/95 mmHg and advanced arteriosclerosis combined with coronary arterial, peripheral arterial, cerebrovascular, and renovascular disease. (2) Myocardial necrosis occurred when oxygen supply was reduced, as evidenced from a fall in systolic blood pressure to 70 mmHg or less during operation or anaemia (RBC smaller than or equal to 3,5 times 10-6/mul) early after operation. (3) Risk of infarction was highest during the early postoperative stress period with elevated plasma catecholamine levels and thus an increased myocardial oxygen demand.

Aged↗