although the automonic nervous system is important in cardiac performance , this work is the first validation in man that ( 1 ) the functional integrity of the beta receptor is maintained even when the autonomic nerves are absent , and ( 2 ) the intrinsic properties of the sinus and atrioventricular nodes are the keystone in stabilizing cardiac electrophysiology after denervation .
C0018787
cardiac
C0004247
atrioventricular nodes