BIOTRONIK Evia DR, Technical Manual

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Evia Technical Manual 33
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0 <0.10 <0.20 <0.30 <0.40 <0.50 <0.60 >=0.60
Absolute Difference
Pe
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Figure 1. Absolute Ventricular Threshold Comparison
To further outline the threshold comparison trends, the mean
threshold difference was 0.06 volts in 382 paired evaluations
within 140 patients. The mean absolute threshold comparison
yielded a slightly larger difference than mean difference.
It is concluded that the automatic ventricular pacing threshold is
equivalent within 0.2 volts to the manual determination. The
threshold measurement analysis clearly demonstrates the ACC
algorithm is able to accurately perform threshold measurements
in both acute and chronic conditions.
Additional Results
The study evaluated the evolution of the successful activation of
the ACC feature at the scheduled follow-ups.
Figure 2
provides a comparison of the ACC activation rates at
the pre-discharge and three-month follow-ups. The reasons for
failed ACC activation are non-capture or high polarization
artifact.