DiDio L J, Lopes A C, Caetano A C, Prates J C
Department of Morphology, Escola Paulista de Medicina, Sao Paulo, Brazil.
Surg Radiol Anat. 1995;17(1):19-26. doi: 10.1007/BF01629494.
The artery of the sino-atrial node was studied in 100 normal human hearts after injection of each coronary artery with coloured gelatine containing a radiopaque substance. The hearts belonged to 69 males and 31 females, being 64 Caucasians and 36 non-Caucasians (Negroes and Mulattoes) whose age ranged from 7 to 80 years. Since the individuals had committed suicide or were victims of accidents, their hearts, after pathologists' evaluation, were considered normal. The sinoatrial node of the normal human heart is supplied by the right coronary artery more frequently (58% +/- 4.9% of the cases) than by the left (42% +/- 4.9). The right anterior medial atrial artery, originating from the right coronary at the level of the medial third of the right anterior quadrant of the atrial dome, is most frequently (50% +/- 5) responsible for the blood supply of the sinoatrial node. Among the branches of the left coronary artery, the left anterior medial atrial artery, originating at the level of the medial third of the left. anterior quadrant of the atrial cupola, was the most frequent blood supplier (25% +/- 4.3) of the sinoatrial node. The origin of the artery of the sinoatrial node from the proximal portion or trunk of the left coronary artery was less frequent (12% +/- 3.2) than the origin from the circumflex artery (30% +/- 4.5). Neither sex nor race influenced the variations of the origin of the sino-atrial node.
在100颗正常人体心脏中，于每支冠状动脉注入含不透射线物质的彩色明胶后，对窦房结动脉进行了研究。这些心脏来自69名男性和31名女性，其中64人为高加索人，36人为非高加索人（黑人及混血儿），年龄范围为7至80岁。由于这些个体是自杀或意外事故的受害者，经病理学家评估，他们的心脏被认为是正常的。正常人体心脏的窦房结由右冠状动脉供血的频率更高（58%±4.9%的病例），高于左冠状动脉（42%±4.9%）。右前内侧心房动脉起源于右冠状动脉心房穹窿右前象限中三分之一水平处，最常（50%±5%）为窦房结供血。在左冠状动脉分支中，起源于左心房穹窿前象限中三分之一水平处的左前内侧心房动脉是窦房结最常见的供血者（25%±4.3%）。窦房结动脉起源于左冠状动脉近端或主干的情况比起源于回旋动脉的情况少见（12%±3.2%），后者为（30%±4.5%）。性别和种族均未影响窦房结动脉起源的变异情况。
