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HEARTBEAT_TRANSMI_TIER

2014-11-28 00:20  
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HEARTBEAT_TRANSMI_TIER
Self-contained device worn by patient transmits his pulse to radio receiver for remote monitoring or recording. Photo-transistor, fed separately, measures changes in light transmitted through earlobe as heart pulses change blood density and volume of lobe.-G. A. Horton and A K.Koroncai, Radio Transmitter for Remote Heartbeat Measurements, Electronics, 33:52, p 54-55.