| 摘要 |
An implantable device for monitoring heart action or action of any other periodic-moving living organ or part of a living body. The device includes a piezoelectric energy converter which is driven by the adjacent moving tissue and which thereby generates electrical energy. The device also includes a pulse generator which in turn keys a radio transmitter circuit. The transmitter circuit is modulated during "on" periods by a signal from the organ being monitored, for example, an EKG signal from the patient's heart. The components are energized solely from the piezo-generated electrical energy. The rate and duration of the keyed bursts of modulated radio transmission depend on the amount of electrical power furnished by the converter. A method of using the device to monitor action of an organ such as the heart of a living body includes implanting the device, powering it from a pulsating portion of the body producing short, spaced r.f. bursts and modulating the bursts with signals representative of data from the heart.
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