Background—Little is known about the relationship between intrinsic cardiac nerve activity (ICNA) and spontaneous arrhythmias in ambulatory animals. Methods and Results—We implanted radiotransmitters to record extrinsic cardiac nerve activity (ECNA; including stellate ganglion nerve activity and vagal nerve activity) and ICNA (including superior left ganglionated plexi nerve activity and ligame...

The effect of sympathetic stimulation (stellate ganglion) on dog cerebral and cephalic blood flows was studied via a cervical or a thoracic approach to the stellate ganglion under sodium pentobarbital or chloralose anesthesia. Two different stimulation voltages (3v and 5v) of monophasic pulses were applied for 1 minute. Venous outflow was measured at the confluence of the sagittal, straight and...

Experiments were performed to determine the influence of cardiac sympathetic efferent nerve stimulation on the discharge rate of atrial type B stretch receptors in the anesthetized, open-chest dog. In all experiments, the left stellate ganglion was stimulated following volume expansion. To determine the effects of stellate stimulation, the responses of atrial receptors were observed during the ...