Accession Number : AD0685144

Title :   SOME PROBLEMS IN PREVENTING MOTION INTERFERENCES DURING PROLONGED EKG INVESTIGATIONS,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Dubrovin,E. D.

Report Date : 19 JUL 1968

Pagination or Media Count : 15

Abstract : Experiments were performed to investigate the possibilities of using the synchronous cumulation method for isolating EKG recordings from interferences caused by movements of the subject. A specialized medical data-processing computer, the ATAS-401 (Nihon Konden Kogyo Co., Ltd., Tokyo, Japan) which accomplishes synchronous cumulation was used in the experiments. A schematic diagram showing the connection of the devices used is shown. Use of the synchronous cumulation method greatly improved the structure of EKG curves recorded during various movements of the subject. Results of three cumulated EKG recordings indicated that interferences produced by movements are rarely characterized as a stationary random process. In a majority of cases, the character depends on the time factor. Selection of the number of cumulation cycles is discussed. Successful use of the synchronous cumulation method depends on the periodicity of the cumulated signal. Problems in recording signal changes and a method of automatic regulation are discussed. The synchronous cumulation method with automatic regulation of cumulation time depending on the interference level is now being clinically tested in a new variant of the device for recording oxygen starvation of the human cardiac muscle. (Author)

Descriptors :   (*ELECTROCARDIOGRAPHY, COMPUTERS), ELECTROPHYSIOLOGY, HYPOXIA, MEASUREMENT, SIGNALS, RECORDING SYSTEMS, HUMANS, USSR

Subject Categories : Medicine and Medical Research
      Computer Hardware

Distribution Statement : APPROVED FOR PUBLIC RELEASE