| 摘要 |
<p>A pacemaker contains at least one sensor with associated electronic circuitry (6) for controlling the pacemaker function and an electrode system (RL) for emitting heart stimulation pulses. Means (2, 8; 10, 12, 14) are provided for enabling the sensor electronic circuitry in conjunction with the pacemaker implantation on the patient, which means comprise a device (2,8) for measuring the electrode impedance so as to enable the sensor electronic circuitry in response to the measured impedance value. The means for enabling the sensor electronic circuitry can alternatively comprise internal telemetry equipment (10,12) in the pacemaker and external telemetry equipment for communications between the telemetry equipments. The external telemetry equipment can contain programming equipment and the internal telemetry equipment be arranged to enable the sensor electronic ciruitry as soon as the programming equipment begins communicating with the internal telemetry equipment, or by sending a special command from the programming equipment. Alternatively the means for enabling the sensor electronic circuitry comprise a reed element (14), controllable by an externally applied magnetic field for enabling the sensor electronic circuitry (6). <IMAGE></p> |
