Mecholyl esophagography.
D002933:Cineradiography; D004931:Esophageal Achalasia / Q000000981:diagnostic imaging*; D004947:Esophagus / Q000000981:diagnostic imaging* / Q000187:drug effects / Q000503:physiopathology; D006801:Humans; D007279:Injections, Subcutaneous; D008688:Methacholine Compounds / Q000008:administration & dosage / Q000494:pharmacology; D009119:Muscle Contraction / Q000187:drug effects
D008688:Methacholine Compounds