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Biomedical subjects

H J Engel

Publications and source records attributed to H J Engel.

71 records · Page 4Linked to original sources
PubMed1975

Major variations in anatomical origin of the coronary arteries: angiographic observations in 4,250 patients without associated congenital heart disease.

In 51 (1.2%) of 4,250 patients studied by selective coronary arteriography, one or more major elements of the coronary arterial system originated from the sinuses of Valsalva in an ectopic manner. The majority of variations involved the left coronary artery. The majority of ectopic ostia were located in the right sinus of Valsalva. Failure to recognize variations in coronary arterial origin can prolong arteriography procedures and lead to errors in interpretation of coronary artery anatomy and pathology. It is concluded from this experience that the incidence and location of major variations in coronary arterial origin are relatively predictable. The data are useful in expeding coronary arteriography procedures and thus improving patient care.

Angiocardiography↗
PubMedDate not supplied

[Studies on the genesis of so-called Sjögren cells in supravital preparations].

1. The effect of the LE-cell factor lies in nuclear blockade; the normal degenerative nuclear swelling and lysis is inhibited. 2. The time of the nuclear blockade and thus the appearance of the LE-bodies depend on the activity of the LE-serum. 3. High-titred sera lead to an early nuclear blockade. Small, rigid, dark, clump-like LE-bodies appear rapidly and are fully phagocytosed. 4. Our experiments have shown that with decreasing activity of the LE-sera the nuclear blockade appears later and more slowly. Such LE-bodies are relatively large and homogenous and have lost some rigidity. They are correspondingly late and only partly phagocytosed. So-called granulocytic and monocytic Sjögren-cells appear. 5. We found that quantitative differences of the causal factors lead on the one hand to LE-cell formation, on the other to the partial phagocytosis phenomenon. Therefore, we prefer not to label the Sjögren-cells as pseudo-LE-cells. 6. It has again been shown that the standardized supravital preparation is not only a simple method for demonstrating LE-cells, but is also superior to other methods used because of its greater specifity and sensitivity. Besides the judgement of cell vitality, many hours after making the preparation phagocytosis can be observed.

Antibodies, Antinuclear↗
PubMedDate not supplied

[Interaction of isoxicam and digoxin].

The influence of maintenance therapy with Isoxicam, 200 mg daily, on digoxin steady-state plasma levels was studied on 12 healthy volunteers. One person dropped out from the investigation program on account of cardiac sensations following the invasion phase with digoxin. No statistically significant differences could be shown during concomitant therapy or after withdrawal of Isoxicam. Neither were toxic glycoside plasma concentrations observed. There were no pathological clinicochemical parameters, in particular no changes in renal function values.

Acetyldigoxins↗
PubMedDate not supplied

[Indomethacin kinetics in synovia and plasma following administration of indomethacin Gits 7/85 in patients with chronic polyarthritis].

Patients suffering from rheumatoid arthritis received a single dose of the new therapeutic system of indomethacin (Gits 7/85). Samples of plasma and synovial fluid were taken after 1, 2, 4, 6, 8, 10, 12, and 24 h. Concentration peaks could not be observed. After 2-3 h plasma levels were achieved which remained constant over the investigational period. Indomethacin concentrations in synovial fluid were seen with some delay. All synovial fluid levels after single application were lower than the plasma concentrations. The kinetics of elimination showed no difference between the two compartments. The above findings confirm the expectations regarding the new therapeutic system of indomethacin (Gits 7/85), i.e., the maintenance of a nearly constant plasma and synovia level for at least 10 h. The avoidance of peaks is seen as an additional advantage.

Arthritis, Rheumatoid↗