On the stimulation of histamine receptors in heart muscle.
D000818:Animals; D006168:Guinea Pigs; D006321:Heart / Q000294:innervation / Q000502:physiology*; D006632:Histamine / Q000032:analysis / Q000494:pharmacology*; D011984:Sensory Receptor Cells / Q000502:physiology*; D013268:Stimulation, Chemical
D006632:Histamine