Abstract: Blood pressure is measured with the aid of a programmed data processor such as a microcomputer. Electrical signals are provided in response to the pressure in a blood pressure cuff as the pressure therein is changed to vary the constriction of an artery. The signals are processed to provide a train of pulses corresponding to successive blood pressure pulses and digital signals representing the amplitude of each pulse and the cuff pressure which accompanies each pulse are stored in the memories of the data processor. The processor has means by which the pulses are first selected in accordance with their relative amplitudes and location in the train so as to satisfy criteria for the rejection of artifacts. The processor provides outputs from its memories in which digital signals representing cuff pressures which were acquired at the same time as the pulses which are identified as occurring at the times of the systolic and diastolic events.