title: Syncope: pathological physiology: differential diagnosis and treatment (I).
mesh_terms: D001921:Brain / Q000098:blood supply; D002245:Carbon Dioxide / Q000097:blood; D006331:Heart Diseases / Q000150:complications; D006439:Hemodynamics; D006801:Humans; D011187:Posture; D013575:Syncope / Q000175:diagnosis* / Q000209:etiology / Q000503:physiopathology; D014636:Valsalva Maneuver
chemical_list: D002245:Carbon Dioxide