Trio™ Operating Instructions 0070-10-0666-01 6 - 7
Appendix Patient Parameter Specifications
6.2.3 ANSI/AAMI EC13-2002 Compliance
The ECG meets the section 4.2 Performance Requirements of ANSI/AAMI EC13-2002 
except for paragraph 4.2.9.13, Synchronizing Pulse for Cardioversion, which is not 
applicable.
6.2.3.1 Disclosed Performance Specifications
Tall T-Wave Rejection: When tested in accordance with ANSI/
AAMI EC13-2002 section 4.1.2.1 c), the 
heart rate meter will reject all T-waves with 
amplitudes less than 120% of a 1 mV, 100 
ms QRS, and a T wave duration of 180 ms 
and a Q-T interval of 350 ms.
Heart Rate Averaging: ANSI/AAMI EC13-2002 section 4.1.2.1 d). 
The Heart Rate Averaging computation is as 
follows: The average of the last 4 R-to-R 
intervals, when last 3 R-to-R intervals > 1200 
ms. Otherwise, the average of the last 12 R-
to-R intervals, minus the maximum and 
minimum values. The update rate of the 
Heart Rate on the display is once per 
second.
Heart Rate Meter Accuracy and Response to 
Irregular Rhythm:
When tested in accordance with ANSI/
AAMI EC13-2002 section 4.1.2.1 e), the 
indicated heart rate after a 20 second 
stabilization period is:
Figure 3a (Ventricular Bigeminy) - 80 bpm
Figure 3b (Slow Alternating Ventricular 
Bigeminy) - 60 bpm
Figure 3c (Rapid Alternating Ventricular 
Bigeminy) - 120 bpm
Figure 3d (Bi-directional Systoles) - 90 bpm