title: [Paradoxical 2nd tone doubling in coronary disease. Polycardiographic study].
mesh_terms: D000328:Adult; D000368:Aged; D003327:Coronary Disease / Q000503:physiopathology*; D004562:Electrocardiography; D005080:Exercise Test; D006321:Heart / Q000503:physiopathology*; D006326:Heart Auscultation; D006801:Humans; D008297:Male; D008875:Middle Aged; D010701:Phonocardiography
vernacular_title: Sullo sdoppiamento paradosso del 2 tono nella malattia coronarica. Studio policardiografico.