Ballesteros Luis Ernesto, Ramirez Luis Miguel, Quintero Ivan Dario
Basic Sciences Department, Medicine Faculty, Universidad Industrial de Santander, Bucaramanga, Colombia.
Rev Bras Cir Cardiovasc. 2011 Apr-Jun;26(2):230-7.
It is necessary knowing the large variability of right coronary (RCA) artery specialty for its implications in surgical procedures and clinic events. This variability is usually related to the length, branches quantity, origin and irrigated territories.
To evaluate by direct examination the morphologic expression of RCA in Colombian people.
RCA were measured in 221 fresh hearts by RCA ostium canalization with polyester synthetic resin that was injected in their branches.
The caliber of the RCA proximal segment and at the level of the acute angle of the heart was 3.42 ± 0.66 mm and 2.9 ± 0.50 mm, respectively. It ended between crux cordis and the left margin in 75.6% of specimens. Posterior interventricular artery (PIA) reached the inferior third, or the apex, or the anterior interventricular sulcus in 149 (67.4%) cases. Sinoatrial node artery (SNA) originated in the right coronary in 134 (60.6%) cases, 77 (34.9%) from circumflex artery (CxA) and from both in 10 (4.5%). Posterior right diagonal artery (PRDA) was noted in 38 (17.2%) hearts, but only 6% of the sample with long PIA, concomitantly presented the PRDA (P = 0.001). In right dominance SNA were originated from RCA in 54.7% and form CxA in 46.3% (P = 0.06).
Caliber of the RCA and its branches is lesser than the majority of previous studies, while the PRDA frequency is slightly higher than the reported in literature. Clinical and pathological scenarios by these variations should be taken into account: hemodynamic procedures, cardiac surgery and arrhythmias from coronary occlusive disease.
了解右冠状动脉（RCA）特征的巨大变异性对于其在外科手术和临床事件中的意义至关重要。这种变异性通常与长度、分支数量、起源和灌注区域有关。
通过直接检查评估哥伦比亚人群中RCA的形态学表现。
对221颗新鲜心脏的RCA进行测量，通过向其分支注射聚酯合成树脂进行RCA开口插管。
RCA近端节段和心脏锐角水平处的管径分别为3.42±0.66毫米和2.9±0.50毫米。75.6%的标本在心脏十字交叉和左缘之间结束。149例（67.4%）后室间动脉（PIA）到达下三分之一、心尖或前室间沟。134例（60.6%）窦房结动脉（SNA）起源于右冠状动脉，77例（34.9%）起源于回旋支动脉（CxA），10例（4.5%）起源于两者。38例（17.2%）心脏发现右后对角动脉（PRDA），但只有6%的长PIA样本同时出现PRDA（P = 0.001）。在右优势型中，54.7%的SNA起源于RCA，46.3%起源于CxA（P = 0.06）。
RCA及其分支的管径小于大多数先前研究，而PRDA的频率略高于文献报道。应考虑这些变异导致的临床和病理情况：血流动力学操作、心脏手术和冠状动脉闭塞性疾病引起的心律失常。
