title: [Certain frequency-rhythmic characteristics of cardiac activity during brief mental effort].
mesh_terms: D000328:Adult; D006339:Heart Rate; D006801:Humans; D008875:Middle Aged; D013315:Stress, Psychological / Q000503:physiopathology*; D013647:Task Performance and Analysis
vernacular_title: Nekotorye chastotno-ritmicheskie kharakteristiki deiatel'nosti serdtsa pri kratkovremennom umstvennom napriazhenii.