[The mechanism of the chronotropic effect of caffeine and theophylline in guinea pigs].
D000818:Animals; D002110:Caffeine / Q000494:pharmacology*; D006168:Guinea Pigs; D006339:Heart Rate / Q000187:drug effects*; D066298:In Vitro Techniques; D008750:Methyldopa / Q000494:pharmacology; D011433:Propranolol / Q000494:pharmacology; D012110:Reserpine / Q000494:pharmacology; D013806:Theophylline / Q000494:pharmacology*
D002110:Caffeine; D008750:Methyldopa; D012110:Reserpine; D011433:Propranolol; D013806:Theophylline
Mehanizam kronotropnog djelovanja kofeina i teofilina u zamorcadi.