PMC:6580293 / 9992-12248 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/6580293","sourcedb":"PMC","sourceid":"6580293","source_url":"https://www.ncbi.nlm.nih.gov/pmc/6580293","text":"Coronary arteries\nMultiple anomalies were observed in the orifices, origin and course of the coronary arteries, as shown in Table 1. The aortic root was accessible in 154 hearts, and while most of these specimens had 2 coronary arterial orifices (131, 85.1%), 20 (13.0%) hearts had more than 2 orifices, whereas 3 (1.9%) had a single coronary orifice. Of the overall number, 61 orifices originated at or above the sinutubular junction, with 49 of these positioned at or above the junction of the left coronary sinus and 12 from above the right coronary sinus (Fig. 2). In 7 (4.3%) hearts, a coronary artery was seen to cross the right ventricular outflow tract; this was the anterior interventricular artery in 6 (3.7%) and the right coronary artery in 1 (0.6%) (Fig. 2).\nFigure 2: Variation in the orifice position and the course of anomalous coronary arteries crossing the right ventricular outflow tract. (A) The high location of the right and left coronary orifices above the sinutubular junction (yellow dashed line). (B) An anterior interventricular artery originating from the right coronary artery and coursing towards the apex. (C) An operated heart, in which the anterior interventricular artery has been dissected, again originating from the right coronary artery, repaired using the 2-patch technique. (D) The aortic root lies to the left of the pulmonary trunk and the right coronary artery crosses the right ventricular outflow tract to achieve its anticipated position in the right atrioventricular groove; a patch has been placed beneath the right coronary artery to avoid incising it.\nTable 1: Variation in the number of coronary arterial orifices, position and anomalous coronary arteries seen crossing the right ventricular outflow tract\nAnatomical variant n (%)\nNumber of coronary orifices 154\n 1 3 (1.9)\n 2 131 (85.1)\n 3 19 (12.3)\n 4 1 (0.6)\nHigh coronary orifice position 154\n Left coronary orifice at STJ 21 (13.6)\n Right coronary orifice at STJ 0\n Left coronary orifice above STJ 28 (18.2)\n Right coronary orifice above STJ 12 (7.8)\nAnomalous coronary artery crossing RVOT 164\n Anterior interventricular artery 6 (3.7)\n Right coronary artery 1 (0.6)\nRVOT: right ventricular outflow tract; STJ: sinutubular 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