BIOTRONIK Evia DR, Technical Manual

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114 Evia Technical Manual
8.3.4 Ventricular Arrhythmia
This function enables long-term recording and analysis of
ventricular extrasystoles (VES events). VES events are defined
as ventricular events that have not been preceded by an atrial
sensed or pacing event.
PVC Classification
PVC Sequence
•
Single PVC V- PVC
•
Couplets V-PVC-PVC
•
Triplets V-PVC-PVC-PVC
•
Runs (4…8) V-PVC-PVC-…
•
#VT Episodes More than 8 consecutive PVC
The High Ventricular Rate count is also displayed.
N
OTE
:
If in DDD(R) and atrial undersensing occurs, spontaneously
conducted ventricular events are evaluated as PVC events.
For this reason, we recommend using the PVC analysis in
DDD(R) mode only in conjunction with bipolar sensing and
an appropriately high atrial sensitivity.
The interval between two consecutive PVC events must be
shorter than 500 ms (i.e., over 120 ppm) for them to be counted.
Otherwise, the second PVC will be ignored and the sequence
interpreted or terminated. This predominantly eliminates the
possibility of PVC events being miscounted as a result of atrial
undersensing.
8.4 Sensor Statistics
8.4.1 Sensor Histogram
This function records how often the sensor rate is within certain
ranges. The rate range is subdivided into 16 rate classes going
from 40 to 180, including bins for rates < 40 bpm and rates
>180 bpm. The percentage and total number of sensed and
paced events occurring within a rate class is displayed.