title: [Usefulness of digital subtraction angiography in evaluation of patency of aortocoronary bypass graft].
mesh_terms: D000792:Angiography / Q000379:methods*; D001026:Coronary Artery Bypass; D003327:Coronary Disease / Q000601:surgery; D006801:Humans; D011184:Postoperative Period; D013382:Subtraction Technique; D014654:Vascular Patency