Journal of Physiology, 1887, v.8, pp. 229-34
Waller was first to use electrodes and leads in demonstrating the action of currents of the heart, avoiding the necessity of opening the chest of laboratory animals and prepaaring the way for present-day clinical electrocardiography. He obtained the first electrocardiogram in man.
Morton no.: 833
Waller, Augustus Dsir, "A demonstration on man of electromotive changes accompanying the hearts beat." (1887). Classic Article Collection. 83.