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Our present knowledge of the nervous regulation of the human heart is dependent upon two sources of information. One is the direct obser-vation of the effect of stimulation of the nerves in experimental animals with the assumption that the nerves act similarly in man; the second is from clinical observation. A method has been devised by which the direct effect of stimulation of the vagus and sympathetic nerves can be studied in the human heart. Ob-servations were made on eight subjects, three of whom met death sud-denly. In these the bodies were obtained 10 minutes postmortem. Five others died of a chronic illness, one of aplastic anemia, one of pulmonary tuberculosis, and the other three of malignancy. Their bodies were ob-tained within 20 minutes after death. The effect of drugs on the beating human heart was studied on a considerable group of other cases, some of which have been previously reported (1). METHOD
Kountz et al. (Thu,) studied this question.