title: Unexplained chest pain.
mesh_terms: D000787:Angina Pectoris / Q000175:diagnosis*; D000792:Angiography; D017023:Coronary Angiography; D003937:Diagnosis, Differential; D004935:Esophageal Diseases / Q000175:diagnosis; D006801:Humans; D013035:Spasm / Q000175:diagnosis