User Manual

Table Of Contents
94 Lumax Technical Manual
NOTE:
In VT zones, the ICD/CRT-D stores successful ATP therapies
only. The stored information includes not only the number of
the ATP therapy (e.g., ATP2), but also the successful
configuration in detail (for example: Burst; R-S1 Interval:
320 ms, S1-S1 Interval: 320 ms; etc.).
2.8.2.3 ATP Timeout
ATP
Timeout is a timer that decrements after the initial ventricular
ATP is delivered (VT-1 zone) and limits the additional ATP
therapies that may be delivered. Once the timer expires, all
further ATP therapies in the sequence are blocked. If further
therapy is required after the timer has expired, the system
advances to the first programmed shock therapy for the
applicable VT zone. Therapy continues until arrhythmia
termination or all programmed therapy (in the applicable zone)
has been delivered. The ATP Timeout is reset each time an
arrhythmia is terminated.
Note: ATP Timeout is not applicable in the Lumax 600/640 &
700/740 models since the Progressive Course of Therapy is
automatically programmed in these devices.
2.8.2.4 ATP One Shot
ATP One Shot offers the opportunity
to treat fast VTs that are
detected in the VF zone with a single ATP sequence delivered
immediately before charging of the high energy capacitors. The
device performs a stability check (same as VT zones, criterion
12% fixed) to determine if the arrhythmia might be a fast VT and if
the rhythm is stable, the programmed ATP sequence is delivered
prior to charging. Charging starts without redetection and the
successful treatment of the arrhythmia will be confirmed prior to
shock delivery during shock charging. If the arrhythmia is
converted by the ATP, the shock is aborted. All ATP therapy
parameters are available for programming ATP One Shot and it
can only be used with Shock Therapy programmed ON.