title: Angiographic technics in assessing the patency of portacaval anastomoses.
mesh_terms: D000641:Ammonia; D000783:Aneurysm / Q000000981:diagnostic imaging; D000792:Angiography; D002404:Catheterization; D004945:Esophagoscopy; D004947:Esophagus / Q000000981:diagnostic imaging; D005069:Evaluation Studies as Topic; D006801:Humans; D008638:Mesenteric Arteries / Q000000981:diagnostic imaging; D011167:Portacaval Shunt, Surgical; D011169:Portal Vein / Q000000981:diagnostic imaging; D011172:Portography; D014682:Vena Cava, Inferior / Q000000981:diagnostic imaging
chemical_list: D000641:Ammonia