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Technical Information


Models G146 and G148

Pacing Therapy

Brady Modes

Normal: DDD(R), DDI(R), VDD(R), VVI(R), AAI(R), Off


Temporary: DDD, DDI, DOO, VDD, VVI, VOO, AAI, AOO, Off

AT/AF ManagementATR Mode Switch, Ventricular Rate Regulation (VRR) - MIN, MED, MAX, Atrial Flutter Response (AFR), PMT Termination, Rate Smoothing
Rate Adaptive PacingAccelerometer with sensor trending function

Heart Failure Therapy

Heart Failure Therapy OptimizationSmartDelay™ (AV Optimization), BiV Trigger, LV Offset, LV Sensing
LV Lead OptionQuadripolar LV lead
LV Pacing Vector Options17 options
LV Sensing Vector Options8 options plus OFF

Patient Diagnostics

Arrhythmia LogbookEvents summary, Stored Electrograms with Annotated Markers, (Intervals and approximately 17 minutes of multichannel EGM, always with 10 seconds Onset and event storage prioritization). Implant activation of all available EGMs. On screen measurement of all stored signal amplitudes and timing 
Histograms & CountersTachy Events and Brady Counters
Heart Rate Variability(HRV)SDANN and HRV Footprint (24 hour heart rate collection period)
Daily Trends For Last 365 Days

Events, Activity Level, Atrial Burden, Respiratory Rate, Heart Rate, SDANN, HRV Footprint, Autonomic Balance Monitor (ABM), Lead impedances and amplitudes


To note: Automatic activation of all available daily trends at implant.

AT/AF Diagnostics% Atrial Burden, Daily burden, Average V-rate during ATR Mode Switch Episode
Heart Failure Therapy/Diagnostics

HF Perspectiv™ report, Respiratory Rate Trend, Weight, Blood Pressure, Heart Rates, HRV Footprint, SDANN, Atrial Arrhythmia Burden, Activity Level, A & V Arrhythmias, Pacing Histograms.


To note: Weight and Blood Pressure are only available via LATITUDE.

Device Testing/Induction Methods

Induction MethodsVfib Induction, Shock on T Induction, Programmed Electrical Stimulation (PES), 50 Hz/Manual Burst Pacing
Commanded Therapy MethodsCommanded Shock, Commanded ATP

Tachyarrhythmia Therapy

Sensing/DetectionZones VF only, or VF and VT or VF, VT, VT-1. Lowest Zone can be Monitor Only
Shock Reduction and Appropriate TherapyAcuShock™ Advanced Technology including Onset/Stability™, Rhythm ID™, Dynamic Noise Algorithm (DNA) for sensing, Automatic Gain Control (AGC) with programmable sensing floor, Narrow Band Pass Filter
Antitachycardia Pacing Therapy (ATP) TerminationQuick Convert™ in VF Zone. Two programmable ATP schemes in both VT and VT-1 zones. Burst, Ramp, Scan, Ramp-Scan
Shock Energy41 J stored, 35 J delivered. First two shocks in each zone programmable. VT-1 has 5 shocks, VT has 6 shocks and VF has 8 shocks. Reverse Last Shock Polarity in zone. Programmable RV Coil to RA Coil and Can (TRIAD), RV Coil to Can, RV Coil to RA Coil (COLD CAN)

VF Zone (200 bpm) – Detection: Rate and Duration, Therapy: Quick Convert, 8 high energy shocks


VT Zone (160 bpm) – Detection: RhythmID or Onset/Stability, Therapy: ATP x 2, 6 high energy shocks

Implant/In Clinic Follow Up

Implant Communication Mode

Zones VF only, or VF and VT or VF, VT, VT-1. Lowest Zone can be Monitor OnlyProgrammable values: Enable use of ZIP telemetry (MICS) (Requires initial use of wand for device ID) or use wand for all telemetry


Nominal: Enable use of ZIP telemetry (Requires initial use of wand for device ID)

Remote Follow Up

Patient Triggered Monitor (PTM)Triggers the storage of two minutes onset and one minute post - EGMs, intervals, and annotated marker data during a symptomatic episode by placing a magnet over the device
Beeper Feature (Patient Alerts)Beep During Capacitor Charge, Beep when Explant is Indicated, Beep when Lead Impedance measurement (Shock or Pace) is Out-of-Range
Magnet FeatureMagnet Response (Off, Store EGM, Inhibit Therapy)
Remote MonitoringThis device is designed to be LATITUDE™ enabled; LATITUDE availability varies by region
WirelessRemote follow-up for all devices (MICS)