Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz

Gewählte Publikation:

Bonatti, J; Dichtl, W; Dworzak, EA; Antretter, H; Unger, F; Puschendorf, B; Dapunt, OE.
Stimulated prostacyclin release by conduits used for coronary artery bypass grafting.
Thorac Cardiovasc Surg. 1998; 46(2):59-62
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Autor/innen der Med Uni Graz:
Dapunt Otto Eugen
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Abstract:
A direct comparison of the three coronary artery bypass conduits internal mammary artery (IMA), right gastroepiploic artery (RGEA), and saphenous vein (SV) concerning arachidonic acid (AA) stimulated release of the vasodilating and platelet inhibiting mediator prostacyclin was the aim of the present study. Pieces of saphenous vein (n = 16), right gastroepiploic artery (n = 8), and internal mammary artery (n = 19) were obtained from patients undergoing coronary artery bypass grafting. After a resting phase of 30 min in HEPES medium arachidonic acid (AA) was added in order to stimulate prostacyclin release. Time-dependent production of the stable prostacyclin metabolite 6-keto-prostaglandin F1 alpha was determined following stimulation. Under basal conditions the IMA (12.4 ng/cm2) and RGEA (12.0 ng/cm2) released more prostacyclin than saphenous vein (4.0 ng/cm2). After AA stimulation 6-keto-prostaglandin F1 alpha release at 30 min was as follows: IMA 806.0 ng/cm2, RGEA 35.9 ng/cm2, SV 82.3 ng/cm2 (p < 0.0001 within grafts, p < 0.0001 between grafts, ANOVA for repeated measures). The internal mammary artery in comparison with the right gastroepiploic artery and saphenous vein seems to be better protected against local thrombotic events and development of coronary artery graft disease with the aid of the vasodilating and platelet inhibiting mediator prostacyclin.
Find related publications in this database (using NLM MeSH Indexing)
Arachidonic Acid - pharmacology
Arteries - transplantation
Coronary Artery Bypass -
Culture Techniques -
Epoprostenol - metabolism
Graft Occlusion, Vascular - physiopathology
Humans -
Mammary Arteries - transplantation
Myocardial Revascularization -
Platelet Aggregation - drug effects
Platelet Aggregation - physiology
Saphenous Vein - transplantation
Vasodilation - drug effects
Vasodilation - physiology

Find related publications in this database (Keywords)
coronary artery bypass graft
internal mammary artery
right gastroepiploic artery
saphenous vein
prostacyclin
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