Key Features
Independent Channels
Independently programmable right ventricular (RV) and left ventricular ( LV ) pacing and sensing
- RV sensing is used to establish RV-based timing and RV pacing inhibition
- LV sensing is only used for LV pacing inhibition
IS-1 or LV-1 Left Ventricular Pace/Sense Lead Port
- Model H120 offers an IS-1 left ventricular pace/sense lead port
- Model H125 offers an LV-1 left ventricular pace/sense lead port
Left Ventricular Protection Period (LVPP)
Designed to prevent pacing during the left ventricular vulnerable period (T-wave)
- LVPP is the period after a left ventricular event, either paced or sensed, when LV pacing is inhibited
- Programmable: 300-500 ms
Tracking Preference
Designed to maintain atrial-tracked ventricular pacing in DDD(R) and VDD(R) modes
- Temporarily reduces PVARP to reestablish atrial-tracked ventricular pacing inappropriately lost due to atrial events occurring in PVARP
- Programmable: On, Off
Patient-centric Diagnostics
HRV Monitor Footprint
Measures changes in intrinsic heart rate and plots the distribution of variability versus heart rate over a 24-hour period
- Displays current footprint and one previously stored footprint to allow for comparison
- Heart rate is plotted on the X axis, variability is plotted on the Y axis, and frequency is plotted using color
- Shows a percentage for the total plot area covered by the footprint
- Vertical line indicates mean heart rate
- Increases in plot area indicate increases in heart rate variability (HRV) and/or heart rate range
HRV Monitor Trending
Plots heart rate (mean, minimum and maximum), HRV Monitor Footprint percentages, and SDANN
Activity Log
Plots the percent of day active for every day of the last week and average weekly data from every week of the last year
- Percent of day active is the percent of day the accelerometer-indicated motion is above a fixed minimal threshold
Mechanical Specifications
Model |
Type |
Size (cm)
(H x W x D) |
Mass (g) |
Volume (cc) |
Atrial and Right Ventricular Pace/Sense Lead Ports |
Left Ventricular Pace/Sense Lead Port |
H120 |
DR |
5.4 x 4.5 x .85 |
26 |
14 |
IS-1 |
IS-1 |
H125 |
DR |
5.4 x 4.5 x .85 |
26 |
14 |
IS-1 |
LV-1 |