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| Oliveira,Carla Lívia Santos de; David,Gustavo Serra; Carvalho,Michelly de Oliveira; Dornelas,; Araújo,Sandra; da Silva,Nailton Cavalcante; Ruiz,Cristiane Regina; Fernandes,Juliana Ruiz; Wafae,Nader. |
| In humans, the right coronary artery is dominant. However, we did not find any citations in the literature concerning anatomical indicators of dominance among dogs. We used 30 hearts from mongrels of both sexes, fixed in 10% formalin. The branches of the coronary arteries were dissected with special attention to the levels that were considered to be reference points. In 96.7%, the circumflex branch of the left coronary artery reached or went beyond the crux cordis. The subsinuosus interventricular artery, ended before reaching the apex in 21 cases, at the apex in five cases and after the apex in four cases. The paraconal interventricular artery, ended before reaching the apex in two cases, at the apex in 11 cases and after the apex in 17 cases. The region... |
| Tipo: Journal article |
Palavras-chave: Morphology; Dog hearts; Circulation; Coronary arteries. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000300030 |
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| Santos,R.L.; Lima,J.T.; Rouver,W.N.; Moysés,M.R.. |
| The relaxation of coronary arteries by estrogens in the coronary vascular beds of naive and hypertensive rats has been well described. However, little is known about this action in gonadectomized rats. We investigated the effect of 17-ß-estradiol (E2) in coronary arteries from gonadectomized rats, as well as the contributions of endothelium-derived factors and potassium channels. Eight-week-old female and male Wistar rats weighing 220-300 g were divided into sham-operated and gonadectomized groups (n=9−12 animals per group). The baseline coronary perfusion pressure (CPP) was determined, and the vasoactive effects of 10 μM E2 were assessed by bolus administration before and after endothelium denudation or by perfusion with NG-nitro-L-arginine methyl ester... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gonadectomy; Estrogen; Vasodilation; Coronary arteries. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2016000500603 |
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| Santos,R.L.; Abreu,G.R.; Bissoli,N.S.; Moysés,M.R.. |
| The present study was designed to determine relaxation in response to 17ß-estradiol by isolated perfused hearts from intact normotensive male and female rats as well as the contribution of endothelium and its relaxing factors to this action. Baseline coronary perfusion pressure was determined and the vasoactive effects of 17ß-estradiol (10 µM) were assessed by in bolus administration before and after endothelium denudation by infusion of 0.25 µM sodium deoxycholate or perfusion with 100 µM L-NAME, 2.8 µM indomethacin, 0.75 µM clotrimazole, 100 µM L-NAME plus 2.8 µM indomethacin, and 100 µM L-NAME plus 0.75 µM clotrimazole. Baseline coronary perfusion pressure differed significantly between males (84 ± 2 mmHg, N = 61) and females (102 ± 2 mmHg, N = 61).... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Estrogen; Vasodilation; Endothelium-derived relaxing factors; Coronary arteries. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000400014 |
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| Machado,Márcia Rita Fernandes; Borges,Edson Moreira; Oliveira,Fabrício Singaretti de; Filippini-Tomazini,Mariana; Melo,Alan Peres Ferraz de; Duarte,José Maurício Barbanti. |
| The course of the coronary arteries was studied in marsh deers for comparison with domestic ruminants. The left coronary artery is originated from the aorta in the cardiac auricular surface and divides into paraconal and circumflex branches, which fit the paraconal interventricular sulcus and the subsinuous sulcus, respectively; this artery also gives off a branch to the conus arteriosus just before penetrating the myocardium. The right coronary artery arises from the aorta, in the heart cranial border and ends in this border, close to the subsinuous interventricular sulcus, perhaps without fitting it. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Marsh deer; Blastocerus dichotomus; Coronary arteries. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95962002000600002 |
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| Rodrigues,A.J.; Évora,P.R.B.; Schaff,H.V.. |
| The present study investigated the protective effect of N-acetylcysteine (NAC) against oxygen radical-mediated coronary artery injury. Vascular contraction and relaxation were determined in canine coronary arteries immersed in Kreb's solution (95% O2-5% CO2), incubated or not with NAC (10 mM), and exposed to free radicals (FR) generated by xanthine oxidase (100 mU/ml) plus xanthine (0.1 mM). Rings not exposed to FR or NAC were used as controls. The arteries were contracted with 2.5 µM prostaglandin F2alpha. Subsequently, concentration-response curves for acetylcholine, calcium ionophore and sodium fluoride were obtained in the presence of 20 µM indomethacin. Concentration-response curves for bradykinin, calcium ionophore, sodium nitroprusside, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coronary arteries; N-acetylcysteine; Endothelium; Oxidative stress; Nitric oxide. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000800012 |
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