User Manual Part 1

4-14
TACHYA RRHYTHMIA THERAPY
ANTITACHYCARDIA PACING THERAPIES AND PARAMETERS
• When the Coupling Interval is programmed as adaptive, the Coupling
Interval will not re-adapt following redetection when the following are
programmed to On (greater than zero):
– Coupling Interval Decrement––the decrement value determines the
timing of the first pulse in subsequent bursts
– Scan Decrement––the d ecrement value d etermines the timing of th e
second pulse in subsequent bursts
Burst C ycle Length (BCL)
The Burst Cycle Length controls the interval between pacing pulses after the
Coupling Interva l.
This timing is controlled in the same fashion as the Coupling Interval: rate
adaptive to the sensed tachycardia or fixedtimespecified in ms.
NOTE: An adaptive BCL is affected in the same manner as a n adaptive
Coupling Interval; the average cycle length is not continually recalculated for
subsequent bursts if the Scan Decrement or Coupling Interval Decrement are
programmed to On.
The following parameters may be programmed to decrement the burst cycle
length during an AT P scheme:
• Ramp Decrement controls the pulse timing within a given burst
• Scan Decrement controls the pulse timing between bursts
Minimum Interval
The M inimum Inte rval limits the Coupling Interval and the BCL in Burs t, Ramp,
and Scan.
If the Coupling Interval reaches the limit, subsequent Coupling Intervals
will remain at the minimu m va lu e. Likewis e, if the BCL reaches the limit,
subsequent BCLs will remain at the minimum value. The Coupling Interval and
BCL may reach the limit independently.
- DRAFT -