title: [Echocardiography: results of its use and prospects of development in the USSR].
mesh_terms: D003327:Coronary Disease / Q000175:diagnosis; D004452:Echocardiography / Q000379:methods / Q000639:trends; D006330:Heart Defects, Congenital / Q000175:diagnosis; D006338:Heart Neoplasms / Q000175:diagnosis; D006349:Heart Valve Diseases / Q000175:diagnosis; D006801:Humans; D009232:Myxoma / Q000175:diagnosis; D010493:Pericarditis / Q000175:diagnosis; D014586:USSR
vernacular_title: Ekhokardiografiia: itogi primeneniia i perspektivy razvitiia v SSSR.