Boston Scientific Corporation CRMN11906 Manuale Utente
PACING THERAPIES
ATRIAL TACHY RESPONSE
5-19
Recovery Time
MSR
Paced rate
LRL
Rest
Stage 1
Rest
Stage 2
Time
Longer
Recovery Time
Recovery Time
Nominal
Recovery Time
Recovery Time
The figure shows the effect of higher and lower settings during a theoretical two-stage exercise test.
Figure 5-11. Recovery Time in exercise test
Programming Recovery Time for Normal Settings also changes the
corresponding selection for Post-Therapy Settings.
corresponding selection for Post-Therapy Settings.
ATRIAL TACHY RESPONSE
ATR Mode Switch
ATR limits the amount of time that the ventricular paced rate is at the MTR
or exhibits upper-rate behavior (2:1 block or Wenckebach) in response to a
pathological atrial arrhythmia.
or exhibits upper-rate behavior (2:1 block or Wenckebach) in response to a
pathological atrial arrhythmia.
In the presence of detected atrial activity that exceeds the Atrial Arrhythmia
Rate Threshold, ATR switches the pacing mode from a tracking mode to a
nontracking mode as follows:
Rate Threshold, ATR switches the pacing mode from a tracking mode to a
nontracking mode as follows:
•
From DDD(R) to DDI(R) or VDI(R)
•
From VDD(R) to VDI(R)
An example of ATR behavior is shown (Figure 5-12 on page 5-20).
- DRAFT -