| Model | A20A1 |
| Size (HxWxD mm) | 40.2x42.9x7.5 |
| M (g) | 21.5 |
| V (cc) | 9.7 |
| Connector | IS-1 BI or UNI |
| Radiopaque ID | VG |
| Battery | |
| Type | Lithium-iodine |
| Voltage | 2.8 V |
| Average projected capacity | .92 Ah |
| Longevity | |
| with Reduced VP™+ off | 10.4 years* |
Programmable Parameters
| Parameter Name | Range | Nominal Value |
| Pacing Modes | VVIR, VVI, VVT, VOOR, VOO, AAIR, AAI, AAT, AOOR, AOO, OVO, OAO | VVIR |
| Lower Rate | 30, 35, 40…60…170, 175 ppm (exc. 65, 85) | 60 ppm |
| Upper Sensor Rate | 80, 90, 95…130…180 ppm | 130 ppm |
| A and RV Pulse Amplitudeb | 0.5, 0.75, 1.0…3.5…4, 4.5, 5, 5.5, 6, 7.5 V | 3.5 V |
| A and RV Pulse Width | 0.12, 0.15, 0.21, 0.27, 0.34, 0.4, 0.46, 0.52, 0.64, 0.76, 1, 1.25, 1.5 ms | 0.4 ms |
| Atrial Sensitivity | 0.25, 0.35, 0.5, 0.7, 1, 1.4, 2, 2.8, 4 mV | 0.5 mV |
| Ventricular Sensitivity | 1, 1.4, 2, 2.8, 4, 5.6, 8, 11.2 mV | 2.8 mV |
| Pacing Polarity (A and V) | Bipolar, Unipolar, Configure | |
| Sensing Polarity (A and V) | Bipolar, Unipolar, Configure | |
| Atrial Refractory Period | 180, 190, 200…250…500 ms | 250 ms |
| Atrial Blanking Period | 130, 140, 150…180…350 ms | 180 ms |
| Ventricular Refractory Period | 150, 160, 170…330…500 ms | 330 ms |
| Therapies to promote intrinsic activation | ||
Sleep
|
On, Off 30, 35, 40…50…90 ppm (exc. 65, 85) 00:00, 00:15, 00:30…22:00…23:45 00:00, 00:15, 00:30…8:00…23:45 |
Off 50 ppm 22:00 8:00 |
| Single Chamber Hysteresis | Off, 40, 50, 60 ppm | Off |
| Rate Response Pacing | ||
| ADL Rate | 60, 65, 70…95…175, 180 ppm | 95 |
| Activity Threshold | Low, Medium Low, Medium High, High | Medium Low |
| Acceleration | 15 s, 30 s, 60 s | 30 s |
| Deceleration | 2.5 min, 5 min, 10 min, Exercise | Exercise |
Implant Detection and Initialization
At the completion of the 30-minute Implant Detection period,
the appropriate pacing and sensing polarities are automatically
selected by the device; Ventricular Output Management is
enabled and Amplitude and Pulse Width become adaptive.
| Implant Detection | On/Restart, Off/Complete |
| Lead Monitor (A and V) | Configure, Monitor Only, Adaptive (Auto Polarity Switch), Off |
| Parameter Name | Range | Nominal Value |
| Notify If < | 200 Ω | 200 Ω |
| Notify If > | 1000, 2000, 3000, 4000 Ω | 4000 Ω |
| Monitor Sensitivity | 2, 3, 4…8…16 | 8 |
Ventricular Output Management
| Parameter Name | Range | Nominal Value |
| Ventricular Output Management | Off, Monitor Only, Adaptive | Adaptive |
| Amplitude Margin | 1.5x, 2x, 2.5x, 3x, 4x (times) | 2x |
| Minimum Adapted Amplitude | 0.5, 0.75…2…3.5 V | 2 V |
| Capture Test Frequency | 15, 30 min; 1, 2, 4, 8, 12 hours; Day at rest; Day at…; 7 days at | Day at rest |
| Capture Test Time | 00:00, 1:00…23:00 | |
| Acute Phase Days Remaining | Off, 7, 14, 21…84, 112, 140, 168… 252 days | |
| V. Sensing During Search | Unipolar, Bipolar, Adaptive | Adaptive |
Cardiac Dashboard II
Highlights significant events, AT/AF and pacing summary, threshold and impedance trends
Ventricular pacing threshold trends
Battery longevity
Pacing summary and access to rate histogram
Atrial and ventricular lead impedance trends
Number of hours/day in atrial arrhythmia, percentage of time
Access to AT/AF diagnostics
Observations
AT/AF compass trends Trend data compiles up to 6 months of daily clinical information in an easy-to-interpret graphic format
Histogram reports
Heart rate histograms
Atrial and ventricular episodes
High rate episodes
Arrhythmia durations
Multiple EGM episodes
Clinician selected diagnostics
Custom rate trend
Ventricular output management detail
High rate detail
Patient data stored in device
Patient identification
Leads implanted
Device implanted
Clinician’s stored notes
Data management
Automatic printing of initial interrogation report
Full page printing
Save-to-Disk capacity for electronic file management
| Telemetry features | |
| Transtelephonic monitor | On, Off |
| Extended telemetry | On, Off |
| Extended marker | Standard, Therapy Trace |
Key parameter history
Initial interrogation report
Strength duration threshold test
Ventricular threshold test
Marker Channel™
Threshold margin test
Magnet test
Underlying rhythm test
Sensing test
Temporary test
| Magnet mode operation | ||
| BOS | ERI/RRT | |
| Single chamber atrial mode | AOO 85 ppm | 65 |
| Single chamber ventricular mode | VOO 85 ppm | 65 |
ERI-RRT Initiation date
| Recommended Replacement Time (RRT/ERI) | |
| Replacement message on programmer (Cardiac Dashboard II) | |
| Battery/lead information | Replacement message and displayed battery voltage on programmer |
| RRT/ERI initiation date | Displayed on programmer |
aTolerance for amplitudes from 0,5V through 6.0V is ± 10%, and
for 7,5V is -20/+0%. Tolerances are based on 37°C and a 500Ω load.
Amplitude is determined 200 μs after the leading edge of the pace.
*SSIR or SSI, 60 ppm, 100% pacing, 2.0V, 0,4 ms pulse width, 1000Ω pacing impedance.