Margaris N G, Kostopoulos K G, Nerantzis C E, Filippatos G S, Kardaras F G, Salahas A I, Antonellis J P, Ifandis G P, Kranidis A I, Tavernarakis A G
Hemodynamic Department of Evangelismos General Hospital, Athens, Greece.
Angiology. 1997 Aug;48(8):673-7. doi: 10.1177/000331979704800802.
The purpose of this prospectively performed study was the angiographic visualization of the posterior right diagonal artery (PRDA) and its differentiation from the epicardial branches of the right coronary artery (RCA), that is, the right marginal artery and the posterior descending artery (PDA). The authors prospectively studied the angiographic findings of 607 patients who underwent coronary angiography. The incidence of the angiographically demonstrated PRDA and its distinction from other epicardial branches arising from the distal third of the RCA was the main point of interest. Two types of PDA in those cases where PRDA was present were also demonstrated. Of the patients examined, 535 had dominant right coronary circulation, 59 had left dominant coronary circulation, and 13 had balanced coronary circulation. PRDA was present in 81 patients with right dominant coronary circulation (15.1%), in 2 patients with balanced coronary circulation (15.4%), and in none with left dominant coronary circulation. PRDA was revealed in 48 (40%) of 120 patients with a short PDA and in only 33 (8%) of 415 patients having long PDA. It is imperative to search always for the PRDA, when one is studying coronary arteriographies, bearing in mind that this artery may perfuse the inferior part of the posterior interventricular septum and the adjoining are, depending on the type of PDA.
这项前瞻性研究的目的是通过血管造影观察右后降支动脉（PRDA），并将其与右冠状动脉（RCA）的心外膜分支，即右缘支动脉和后降支动脉（PDA）区分开来。作者前瞻性地研究了607例行冠状动脉造影患者的血管造影结果。血管造影显示的PRDA的发生率及其与源自RCA远端三分之一处的其他心外膜分支的区别是主要关注点。在存在PRDA的病例中，还展示了两种类型的PDA。在接受检查的患者中，535例为右冠状动脉优势型循环，59例为左冠状动脉优势型循环，13例为均衡冠状动脉循环。PRDA存在于81例右冠状动脉优势型循环患者中（15.1%），2例均衡冠状动脉循环患者中（15.4%），而左冠状动脉优势型循环患者中未发现。在120例PDA较短的患者中，48例（40%）发现了PRDA，而在415例PDA较长的患者中，仅33例（8%）发现了PRDA。在研究冠状动脉造影时，必须始终寻找PRDA，要记住，根据PDA的类型，这条动脉可能会灌注后室间隔的下部及相邻区域。
