PORTABLE MINIATURE SOLID-STATE HEART-RATE RECORDER FOR MONITORING DAILY PHYSICAL-ACTIVITY

  • 1 January 1977
    • journal article
    • research article
    • Vol. 4  (3) , 131-140
Abstract
A compact, rugged, solid-state heart rate recorder (63 .times. 94 .times. 22 mm, 195 g) to measure normal daily heart rates over periods of up to 33 h is described. With an interval switch selection can be made for a mean heart rate over 30, 60 or 120 s. The ECG amplifier filter is equipped with an automatic gain control to eliminate R-wave amplitude changes during physical activity. A continuous acoustic check on correct electrode attachment and sufficient signal amplitude is possibly by means of an earphone. Data may be stored on punch tape, tape recorder or processed on-line, or plotted directly on a line writer to obtain a heart rate profile over the measured time. In 45 studies with adults and children the heart rate recorder has proven to be a reliable instrument.

This publication has 2 references indexed in Scilit: