Objective To observe the protective effect of acupuncture at Neiguan point (内关穴) on myoeardia in rats with myocardial isehemia/reperfusion (I/R) injury and explore the relationship between the effect and the content of 5-hydroxytryptamine (5-HT) in the dorsal spinal cord and dorsal root ganglion (DRG). Methods Forty Sprague-Dawley (SD) rats were randomly divided into four groups: normal control, sham operated, model and acupuncture groups (each n= 10). The rat models of I/R were established by ligating the left anterior descendi...