title: [A study on the precardiac vibration. I. Normal patterns].
mesh_terms: D000293:Adolescent; D000328:Adult; D006321:Heart / Q000502:physiology; D006801:Humans; D007734:Kymography / Q000379:methods*; D008297:Male; D013909:Thorax / Q000502:physiology*; D014732:Vibration