User's Manual

105
Diagnostic Memory Functions (Statistics)
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AES Trend
In the AES trend, the sequence of atrial extrasystoles per minute is
displayed in the form of a line chart. The AES trend is a rolling long-
term trend with a recording time of 180 days and a resolution of 24
hours. 0-100 AES/min. are displayed.
In addition, individual AES, couplets, triplets, the shortest Ax-AES
interval, and the maximum number of AES per hour are displayed.
AES Versus Atrial Rate
The display of the AES vs. atrial rate histogram takes place in 16
equidistant rate classes of < 31 to > 179 ppm. The graphical display
shows the percentages of the individual classes in the form of a bar
chart and the total number of events.
AES Coupling Interval
The AES coupling interval shows in which millisecond range the
prematurity has taken place. The intervals of the AES—AES sequences
are displayed from
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126 to > 1499 ms in 16 histogram classes. The
graphical display shows the percentages of the individual classes in the
form of a bar chart and the total number of events.
VES classification
This function permits long-term recording (over several years) and
classification of ventricular extrasystoles (VES). Events that occur in
one of the two following situations are classified as VES:
• When a ventricular event without a preceding sensed or paced event
takes place,
— then the Vx-Vs interval must be shorter than 500 ms in order
for the ventricular (Vs) event is classified as VES.
• When a preceding atrial event is sensed during the refractory
period,
— then the Ars-Vs interval must be longer than 300 ms in order
for the ventricular sense event to be classified as VES.