thus , when atp and adenosine are injected rapidly into the right atrium of the intact canine heart , vagal involvement in the mechanism of action of atp but not of adenosine is mainly responsible for the difference in the magnitude of the electrophysiologic effects of these 2 compounds , and only a small part of the electrophysiologic effects of atp are the result of its degradation to adenosine .
C0001480
atp
C0001443
adenosine