Device for Indirect Registration of the Calibrated Arterial Upstroke in Man

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Abstract
A device has been built which, without requiring intra‐arterial puncture, automatically constructs a calibrated upstroke of the arterial pulse wave as well as the durations and intensities of the arterial sounds. The horizontal sweep of a cathode‐ray oscilloscope is triggered by the electrocardiogram. The vertical axis is determined by the height of the mercury column in the sphygmomanometer. The vibration amplitude and duration of the acoustic signal are recorded as the brightness and duration of the trace during each cycle.