HR
Measurement range
Feline:
Canine:
Other animals:
15 to 350 bpm
15 to 350 bpm
15 to 300 bpm
Resolution 1 bpm
Precision ±1 bpm or ±1%, whichever is greater.
Trigger threshold level 200 µV (lead II)
Trigger indication There will be an audible beep on every beat captured.
Heart Rate Averaging The average Heart Rate is computed as follows:
When the last 3 R-to-R intervals > 1200 ms, compute the average
of the last 4 R-to-R intervals; otherwise, compute the average of
the last 12 R-to-R intervals minus the longest and shortest
intervals.
The displayed Heart Rate is updated once per second.
Heart Rate Meter Accuracy
and Response to Irregular
Rhythm
The indicated heart rate after a 20 second stabilization period is:
Figure 3a (Ventricular Bigeminy) -80±1 bpm
Figure 3b (Slow Alternating Ventricular Bigeminy) -60±1 bpm
Figure 3c (Rapid Alternating Ventricular Bigeminy) -120±1bpm
Figure 3d (Bi-directional Systoles) -90±2 bpm
Response time to heart rate
changes
Less than 11 sec for a step increase from 80 to 120 BPM
Less than 11 sec for a step decrease from 80 to 40 BPM
Response time of tachycardia
alarm
The response time is as follows:
Figure 4ah – range: 15.7 to 19.2s, average: 17.4s
4a – range: 5.7 to 8.5s, average: 7.5s
4ad – range: 3.6 to 5.1s, average: 4.2s
Figure 4bh – range: 11.5 to 14.7s, average: 12.9s
4b – range: 4 to 14s, average: 7.2s
4bd – range: 6.6 to 14.5s, average: 10.5s
Tall T-Wave Rejection The heart rate meter will reject all T-waves with amplitudes less
than 1.2 mV, 100 ms QRS, a T wave duration of 180ms and a
Q-T interval of 350 ms.
A-6
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