Heart pacemaker and monitor.

摘要

A heart pacemaker and monitor comprises a first unit 10 (Fig.4) positioned externally of the body and a second unit 12 surgically implanted within the body. The first unit transmits r.f. electromagnetic energy to the second unit to provide the sole energisation for the second unit and also transmits control pulses for controlling the application of stimulation pulses to the atrium 40 and/or ventricle 42 of the heart via circuits 62 and 64. The second unit 12 also senses atrial and ventricular activity and signals representative thereof are successively sampled and pulse-width modulated by circuit 74 and transmitted to the first unit 10. The first unit 10 is arranged to demodulate and demultiplex these signals for display on a monitor and also controls the timing of the stimulation pulses.