Medtronic PROTECTA XT DR D314DRG, Руководство для клиницистов

Страница: 461 / 508

Table 30. Tachyarrhythmia detection parameters (continued)
Parameter Programmable values Shipped Reset
High Rate Timeout…
VF Zone Only Off ; 0.25; 0.5; 0.75; 1; 1.25; 1.5;
1.75; 2; 2.5; 3; 3.5; 4; 4.5; 5 min
Off Off
All Zones Off ; 0.5; 1; 1.5 … 5; 6; 7 … 20;
22; 24; 26; 28; 30 min
— —
TWave On ; Off On Off
RV Lead Noise…
RV Lead Noise On; On+Timeout ; Off On+Timeout Off
Timeout 0.25; 0.5; 0.75 … 2 min 0.75 min —
Sensitivity
Atrial
c,d
0.15; 0.30 ; 0.45; 0.60; 0.90; 1.20;
1.50; 1.80; 2.10; 4.00 mV
0.3 mV 0.3 mV
RV
c,d
0.15; 0.30 ; 0.45; 0.60; 0.90;
1.20 mV
0.3 mV 0.3 mV
a
The measured intervals are truncated to a 10 ms multiple (for example, 457 ms becomes 450 ms). The device
uses this truncated interval value when applying the programmed criteria and calculating interval averages.
b
The AF/Afl, Sinus Tach, and Wavelet features are automatically set to On when VF Detection is set to On.
c
This setting applies to all sensing in this chamber for both tachyarrhythmia detection and bradycardia pacing
operations.
d
Carefully evaluate the possibility of increased susceptibility to EMI and oversensing before changing the
sensitivity threshold to its minimum (most sensitive) setting of 0.15 mV. When susceptibility to modulated
interference is tested under the conditions specified in CENELEC standard EN 45502-2-2:2008, clause 27.5.1,
the device may sense the interference if the sensitivity threshold is programmed to the minimum value of 0.15 mV.
The device complies with the requirements of clause 27.5.1 when the sensitivity threshold is programmed to
0.3 mV or higher.
B.3 Atrial tachyarrhythmia therapy parameters
Table 31. Atrial tachyarrhythmia therapy parameters
Parameter Programmable values Shipped Reset
Anti-Tachy Pacing (ATP)
AT/AF Rx Status
On; Off Off Off
Therapy Type 50 Hz; Ramp; Burst+
Rx1: Ramp
Rx2: Burst+
Rx3: 50 Hz
— —
AT/AF Automatic CV
Status
On; Off Off Off
Fast AT/AF Rx Status On; Off Off Off
Medtronic PROTECTA™ XT DR D314DRG
Clinician Manual 461