[The coronary collateral system in man].
The aim of this work is to stand out the anastomotic network between the two coronary arteries. This satisfies the basic myocardiac activity, but it becomes inefficient in an increased cardiac consumption of oxygen. The anastomotic collateral system was confirmed imagistically and by necroptic pieces. The coronarographs in vitro, using BaSO4 as a contrast substance, proved the existence of anastomosis between branches emerging from the same coronary artery or from both sources. In human body, these collateral branches with a diameter less or equal to 40 m have a minor role in cardiac perfusion economy. In case of obstruction of a thick coronary branch, the anastomosis will develop in a few weeks; that is confirmed by the increase of blood-flow at this level. Combined studies of echography and angiography (1992) proved that developed anastomosis induce a decreased frequency of pathological cases related to the dynamics of the myocardiac wall at a lower level from the obstruction.
Sorodoc
L
L
Catedra de Anatomie, Facultatea de Medicină, Universitatea de Medicină şi Farmacie Gr. T. Popa, Iaşi.
Suliman
I
I
D000328:Adult; D001160:Arterioles / Q000000981:diagnostic imaging / Q000473:pathology; D003097:Collateral Circulation; D017023:Coronary Angiography; D003331:Coronary Vessels / Q000000981:diagnostic imaging / Q000473:pathology*; D006801:Humans; D008875:Middle Aged; D017202:Myocardial Ischemia / Q000000981:diagnostic imaging / Q000473:pathology; D014463:Ultrasonography