A compact ECG R-R interval, respiration and activity recording system.
An ECG R-R interval, respiration and activity recording system has been developed for monitoring variability of heart rate and respiratory frequency during daily life. The recording system employs a variable gain instrumentation amplifier, an accelerometer, a low power 8-bit single-chip microcomputer and a 1024 KB EEPROM. It is constructed on three ECG chest electrodes. The R-R interval and respiration are detected from the ECG. Activity during walking and running is calculated from an accelerator. The detected data are stored in an EEPROM and after recording, are downloaded to a desktop computer for analysis.
Department of Electronics, Hiroshima Institute of Technology, Hiroshima 731-5193, Japan.
Takahiro
T
Yoshimura
Yoshiharu
Y
Yonezawa
Hiromichi
H
Maki
Hidekuni
H
Ogawa
Allen W
AW
Hahn
Julian F
JF
Thayer
W Morton
WM
Caldwell
D000054:Acceleration; D000203:Activities of Daily Living; D000328:Adult; D003936:Diagnosis, Computer-Assisted / Q000295:instrumentation / Q000379:methods; D015716:Electrocardiography, Ambulatory / Q000295:instrumentation* / Q000379:methods; D004867:Equipment Design; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D016247:Information Storage and Retrieval / Q000379:methods; D008297:Male; D008904:Miniaturization; D018670:Monitoring, Ambulatory / Q000295:instrumentation / Q000379:methods; D009068:Movement / Q000502:physiology*; D012129:Respiratory Function Tests / Q000295:instrumentation*; D015656:Respiratory Mechanics / Q000502:physiology*; D014159:Transducers