title: The knocking heart signals out for freedom.
mesh_terms: D002908:Chronic Disease; D003937:Diagnosis, Differential; D004452:Echocardiography; D006326:Heart Auscultation; D008946:Mitral Valve Stenosis / Q000175:diagnosis; D010494:Pericarditis, Constrictive / Q000175:diagnosis* / Q000000981:diagnostic imaging; D011859:Radiography