User Manual Part 1

TACHYARRHYTHMIA DETECTION
RATE SENSING
3-5
Table 3-2. Nominal values for Ventricular Rate Threshold configurations (continued)
Ventricular Zone Configuration
VT-1 Zone VT Zone VF Zone
2 Zones
––
160 bpm 200 bpm
3 Zones 140 bpm 160 bpm 200 bpm
Figure 3-1. Ventricular Tachy Detectio n settings
• Rate thresholds in adjacent zones must differ by at least 20 bpm
• The lowest Ventricular Tachyarrhythmia Rate Threshold must be at least
5 bpm higher than the MTR, MSR, and the MPR
• The lowest Ventricular Tachyarrhythmia Rate Threshold must be at least
15 bpm higher than the LRL
Use of Atrial Information
The atrial rate may be used to:
• Inhibit ventricular therapy in the presence of atrial fibrillation o r atria l flutter
• Bypass ventricular therapy inhibitors if the ventricular rate is faster than
the atrial rate
The pulse generator will respond to atrial sensing regardless of whether an
atrial lead is implanted. If an atrial lead is not implanted or it has a fault,
program the atrial lead from Bipo lar to Off (when programmed to Off, atrial
sensing is not performed; atrial pacing will occur). When programming the
atrial lead to Off, change the Brady Mode to prevent atrial sensing or pacing.
Next, on the applicable VT/VT-1 Detection Enhancement screens, program the
following features accordingly to avoid the use of erroneous atrial data:
• V Rate > A Rate––program to Off (for Onset/Stability detection
enhancement suite)
- DRAFT -