SINGULAR RIGHT CORONARY-ARTERY IN ABSENCE OF THE LEFT CORONARY OSTIUM

We report the rare congenital anomaly of a singular right coronary art ery in absence of the left coronary ostium. In a 31-years-old man, cor onary arterial angiography demonstrated a right coronary artery which, arising from the right Sinus Valsalvae, first described the normal ri ght coronary arterial course but in the apical region continued to fol low, in reverse direction, the normal course of the left anterior desc ending artery. The proximal diameter of the vessel measured 5.2 mm. Th allium scintigraphy showed no ischaemia of the anterior wall. The risk of developing circumscribed atherosclerosis due to anatomical reasons seems not to be increased, as no additional bifurcation nor kinking w as to be found.