Ortale José Roberto, Keiralla Luisa Carolina Borges, Sacilotto Luciana
Pontifícia Universidade Católica de Campinas, Campinas, SP, Brazil.
Arq Bras Cardiol. 2004 May;82(5):468-72, 463-7. doi: 10.1590/s0066-782x2004000500009. Epub 2004 Jun 8.
To describe the trajectory of the posterior ventricular branches of the coronary arteries in the epicardial adipose tissue, and to propose a new criterion for analyzing the distribution of these branches, according to the traditional classification, to determine the predominance or balance of the coronary arteries in the arterial supply to the heart.
Forty hearts obtained from autopsies of adults were dissected and fixed in a formol solution. The posterior face of each ventricle was divided into 8 approximately equal areas for the morphological classification of the coronary circulation. The following 3 traditional types were considered: A) right dominance, B) balanced, and C) left dominance. The number, diameter, and terminal areas of the posterior ventricular branches in the epicardium were analyzed.
The following branches and respective frequencies were found: left marginal branch -- 100%; posterior left ventricular branches: lateral -- 75%, intermediate -- 82.5%, and medial -- 87.5%; interventricular posterior branch -- 95%; posterior right ventricular branch: medial -- 40%, intermediate -- 32.5%, and lateral -- 40%; posterior diagonal branch of the right ventricle -- 17.5%; right marginal branch -- 95%. In regard to dominance, the following values were found: dominance of the right coronary artery -- 62.5%; balanced type -- 25%; and dominance of the left coronary artery -- 12.5%.
The method adopted allowed a more precise classification of the types of coronary artery distribution found. The right coronary artery dominance type was the most prevalent, followed by the balanced type and the left coronary artery dominance.
描述冠状动脉后室支在心外膜脂肪组织中的走行轨迹，并根据传统分类法提出一种分析这些分支分布的新标准，以确定冠状动脉在心脏动脉供血中的优势或平衡情况。
对40颗取自成人尸体解剖的心脏进行解剖，并固定于福尔马林溶液中。将每个心室的后表面分为8个大致相等的区域，用于冠状动脉循环的形态学分类。考虑以下3种传统类型：A）右优势型，B）均衡型，C）左优势型。分析心外膜后室支的数量、直径和终末区域。
发现以下分支及其各自的出现频率：左缘支——100%；左心室后支：外侧支——75%，中间支——82.5%，内侧支——87.5%；室间后支——95%；右心室后支：内侧支——40%，中间支——32.5%，外侧支——40%；右心室后对角支——17.5%；右缘支——95%。关于优势类型，发现以下数值：右冠状动脉优势型——62.5%；均衡型——25%；左冠状动脉优势型——12.5%。
所采用的方法能够对所发现的冠状动脉分布类型进行更精确的分类。右冠状动脉优势型最为常见，其次是均衡型和左冠状动脉优势型。
