Precision Digital Instrument for Calculation of Heart Rate and R-R Interval

An economical precision digital heart rate meter has been constructed for use in general laboratory EKG studies and especially as a diagnostic aid in pacemaker clinics. The instrument features a digital method for rate computation with no calibration required, a system test feature and ability to measure and digitally display both heart rate in beats per minute (bpm) and R-R interval in miliseconds.