Chapter 5
Programmable Parameters
Evia HF / HF-T Technical Manual
PAGE 21
Figure 6: Night Rate Screen
When Night rate is active, the Basic rate is reduced to the Night rate using the Sensor rate Decrease
value programmed in the device, even when the sensor is OFF. When Night rate ends, Evia CRT-P
uses the Sensor rate Increase value to return to the basic rate.
If the sensor is programmed OFF, the device will use the default sensor rate increase/decrease values.
The use of sensor increase/decrease values prevents sudden rate changes that may be felt by the
patient.
During Night rate, the accelerometer remains active, and the patient will continue to receive the benefit
of sensor-driven pacing.
Night rate is NOT available when CLS is active as CLS determines rate requirements for the patient.
One may consider reducing the basic rate of the device to optimize the intrinsic rhythm.
Caution should be used in patients who travel across time zones as Night rate is clock-based. Night
rate start and stops times are programmable in 10 minute increments.
The blue conflicts show permanent programming conflicts when ventricular capture control (VCC) is
programmed ON. These conflicts appear when VCC is programmed ON in single/dual chamber Evia
and when RV only pacing is programmed ON in the Evia HF / HF-T.
The red conflicts seen in
show that Night Rate cannot be programmed greater than the basic
rate value. The value OFF will always correspond to the programmed basic rate of the device.
NOTE:
When Night rate and Rate Hysteresis are programmed, the lowest pacing rate possible is the
programmed Night rate. Evia CRT-P does not allow programming less than 30 bpm.
NOTE:
When Night Mode and Ventricular Capture Control are programmed ON simultaneously in VVI(R),
VCC will not take the rate below the programmed night rate
Over time, the pulse generator’s internal time-of-day clock will exhibit a discrepancy with the actual
time (less than 1 hour per year). This will cause a corresponding discrepancy between the programmed
bed and wake times and the actual times that the system changes the rate.
Summary of Contents for Evia HF
Page 1: ...Cardiac Rhythm Management Heart Failure Therapy Evia HF HF T Evia HF HF T Technical Manual...
Page 8: ...Chapter Table of Contents Evia HF HF T Technical Manual PAGE vi...
Page 12: ...Chapter 2 Indications Evia HF HF T Technical Manual PAGE 4...
Page 14: ...Chapter 3 Contraindications Evia HF HF T Technical Manual PAGE 6...
Page 98: ...Chapter 7 Product Storage and Handling Evia HF HF T Technical Manual PAGE 90...
Page 104: ...Chapter 9 Lead Connection Evia HF HF T Technical Manual PAGE 96...
Page 118: ...Chapter 10 Elective Replacement Indication ERI Evia HF HF T Technical Manual PAGE 110...
Page 130: ...Chapter 13 Order Information Evia HF HF T Technical Manual PAGE 122...
Page 132: ...Chapter 14 Order Information Evia HF HF T Technical Manual PAGE 124...
Page 136: ...PAGE 128 Appendix A Evia HF HF T Technical Manual...