title: [Feedback channel for transmission of the ECG signal via telephone lines].
abstract: The elaborated devices produce a feedback channel in the three-channel system for ECG transmission through the telephone line. Crystal-controlled frequencies and medium-scale integrated microcircuits are used in the receiving and transmitting parts of the device. The system trial operation has demonstrated serviceability and interference immunity.
mesh_terms: D004562:Electrocardiography / Q000295:instrumentation*; D004867:Equipment Design; D005246:Feedback; D006801:Humans; D013689:Telephone / Q000295:instrumentation*
vernacular_title: Kanal obratnoĭ sviazi pri peredache EKG-signala po telefonnym liniiam.