A1-right coronary; A2-left coronary, A3-descending aorta; B4-right pulmonary vein; B5-interventricular septum; B6-mitral valve; C7-right coronary; C8-left main coronary; C9-aortic valve; D10-ASD; E11-anomalous origin right coronary (off left, 'malignant' course between RV outflow tract and aortic root); E12-left main coronary (at point of bifurcation); C13-right coronary; C14-circumflex; F15-left main coronary; F16-circumflex; F17-LAD (anterior interventricular); F18-obtuse marginal; F19-stenosis near junction of circumflex and obtuse marginal; F20-balloon in place for angiogplasty; F21-stenosis no longer seen