A technique is described which can be used in evoked response studies to evaluate the electrical activity of an electrode relative to a distant point without electrocardiographic signal interference. The recording sweep and the onset of the stimulus are triggered from the electrocardiogram after a variable delay so that the average is obtained in a relatively flat portion of the electrocardiographique. © 1970.
Jewett, D. L. (1970). An average response technique for recording potentials relative to a distant point without EKG interference. Electroencephalography and Clinical Neurophysiology, 28(4), 414–416. https://doi.org/10.1016/0013-4694(70)90234-8