Effect of drugs on heart sound intensity.
D000680:Amyl Nitrite / Q000494:pharmacology*; D006321:Heart / Q000187:drug effects*; D006439:Hemodynamics / Q000187:drug effects; D006801:Humans; D008297:Male; D008729:Methoxamine / Q000494:pharmacology*; D008875:Middle Aged; D009638:Norepinephrine / Q000494:pharmacology*; D010701:Phonocardiography
D000680:Amyl Nitrite; D008729:Methoxamine; D009638:Norepinephrine