The effect of verapamil and dibutyryl cAMP on the spontaneous activity of the sinus node.
D000818:Animals; D003994:Bucladesine / Q000494:pharmacology*; D066298:In Vitro Techniques; D009638:Norepinephrine / Q000494:pharmacology; D010477:Perfusion; D011817:Rabbits; D012849:Sinoatrial Node / Q000187:drug effects* / Q000502:physiology; D014700:Verapamil / Q000494:pharmacology*
D003994:Bucladesine; D014700:Verapamil; D009638:Norepinephrine