although muscarinic blockade with 0.04 mg/kg atropine shortened the ah interval from a control value of 123 +/- 12 to 74 +/- 4 ms , it did not modify the effects of adenosine or atp , or both ( that is , latency and duration of the effects were not significantly different from before atropine administration ) .
C0001443
adenosine
C0001480
atp