User's Manual

100 Protocol Systems, Inc.
HR Accuracy ±3 beats per minute or 3%, whichever is greater
NOTE: AAMI Test 4.1.4 part f: Accuracy is affected (i.e., rate drops)
when QRS and pacer spikes are nearly simultaneous as
occasionally is the case during this AAMI test.
Heart Rate Averaging Method Heart rate = 60 / latest average interval in seconds.
For higher heart rates, latest average interval = 7/8 of previous
average interval + 1/8 of latest interval.
For lower heart rates, latest average interval = 3/4 (previous average
interval) + 1/4 latest interval.
Transition rates for choice of formula include hysteresis and are 70
and 80 beats per minute.
Drift Tolerance (AAMI Specification
EC13-1992, 3.2.6.3)
80 beats per minute indicated for 80 beats per minute ECG plus drift
waveform
Pacer Display Pacer indicator shown on screen if PACER function turned on; pacer
spike always shown if of sufficient amplitude.
Pacer Pulse Rejection Pacer detection range (i.e., will show the dashed vertical marker) for
0.1 ms pulses is ±3 mV to ±700 mV, and drops linearly to ±2 mV to
±700 mV for 0.2 to 2 ms pulses.
Will not count as heartbeats approximately 95% of pacemaker
pulses within pacer detection range, with or without AAMI (EC13
1992) tails of 4, 25, 50, 75, or 100 ms decay time constant, whose
tail amplitudes are 2.5% or 25%, 2mV maximum, whether
ventricular only, or A-V sequential pulses, all per AAMI tests 3.1.4.1
and 3.1.4.2
Response to Irregular Rhythm (AAMI specification EC13-1992, 3.1.2.1. Part e.)
Ventricular Bigeminy (VB) 78 to 81 bpm (80 bpm expected)
Slow Alternating VB 57 to 65 bpm (60 bpm expected)
Rapid Alternating VB 118 to 123 bpm (120 bpm expected)
Bidirectional Systole 88 to 93 bpm (90 bpm expected)
1mV Ventricular Tachycardia 197 to 198 bpm (206 bpm expected)
2mV Ventricular Tachycardia 193 to 197 bpm (206 bpm expected)
ECG Specifications (Continued)
Characteristic Specification
AAMI 6-pin ECG connector side
panel view
HP 12-pin ECG connector side
panel view
LA
LL
RA
SHIELD
C
RL
RA
LL
LA
SHIELD
RL
C