Influence of thoracic spinal subarachnoid microinjection of noradrenaline (NA

40mg/20ul) on the effect of electroacupuncture (EA) at Neiguan (PC6) was observed in 40 rabbits anesthetized with urethan-chloralose. Results showed that: 1) EA of Neiguan (PC6) could significantly accelerate the recovery of ST - segment and T-wave of electrocardiogram induced by acute myocardial ischemia (AMI); 2 ). Subarachnoid microinjection of NA also could promote the recovery of ST

T and blood pressure of post-AMI; and 3) Subarachnoid microinjection of NA could strengthen the effect of EA of Neiguan (PC6) to promote the reocvery of ST and T of Post-AMI. It suggests that a-receptors of intra-thoracic spinal cord participate in the action of EA of Neiguan (PC6) ameliorating AMI

and the upper thoracic segement is one of the links fqr connecting Neiguan and the heart