title: Left main coronary arterial patency assessed with cross-sectional echocardiography.
mesh_terms: D000328:Adult; D000368:Aged; D002114:Calcinosis; D003251:Constriction, Pathologic; D017023:Coronary Angiography; D003331:Coronary Vessels / Q000503:physiopathology*; D004452:Echocardiography; D006801:Humans; D008875:Middle Aged