Need Help?
Contact Us


Cardiac Resynchronization Therapy Defibrillator (CRT-D)

Only the X4 quadripolar CRT-D provides 17 pacing vectors plus industry-leading projected longevity for more streamlined patient care.

Key Resources

Directions for Use Technical Information CRT-D Brochure Indications, Safety and Warnings



Product Details

Models G146 and G148

  • The INOGEN X4 CRT-D features 17 pacing vectors designed to provide more options for phrenic nerve stimulation avoidance and pacing threshold management.
  • Brings forward the same long lasting battery technology as previous generations of Boston Scientific devices.
  • Includes the new EasyView™ header with color coded lead ports, designed to improve implant efficiency. 
  • The world's thinnest high-energy CRT-D on the market.

Offers an uncompromised set of features

  • An advanced system solution for patient comorbidities and HF monitoring (HF Perspectiv™ report, LATITUDE™ NXT Remote Patient Management* with weight scale and blood pressure sensors, and Respiratory Rate Trend).
  • AcuShock™Advanced Technology, multiple programmable options to reduce inappropriate and unnecessary shocks, including a choice of rhythm discriminators, antitachycardia pacing (ATP) therapy in all rates zones, and advanced sensing and filtering.
  • SafetyCore™ technology intended to provide lifesaving shock therapy and basic pacing functionality in the event of an unrecoverable fault.

*Caution: Investigational device. Limited by United States Federal Law to investigational use. Not for sale/use in the United States.

See More

Mechanical Specifications

Model Type Size (cm)
(W x H x D)
Connector Type
G148 X4 CRT-D 5.37 x 8.18 x 0.99 73.8 32.5 RA:IS-1; RV:DF4; LV:IS4
G146 X4 CRT-D 5.37 x 8.08 x 0.99 73.4 32.0 RA:IS-1; RV:IS-1/DF-1; LV:IS4

Pulse Generator Projected Longevity (All INOGEN X4 CRT-D Models a,b,c,d)

 Pacing Amplitude

Projected Longevity (years) at 500Ω and 700Ω
 Pacing Impedance (RV and LV) 
RA/RV LV 500Ω 700Ω
2.5 V 3.0 V 8.1 8.6
2.5 V 3.5 V 7.6 8.2
3.5 V 3.5 V 6.8 7.5
3.5 V 5.0 V 5.7 6.5

a Assumes ZIP™ telemetry use for 3 hours at implant time and for 40 minutes annually for in-clinic follow-up checks.

b Assumes standard use of the LATITUDE™ Communicator as follows: Daily Device Check on, monthly Full Interrogations (scheduled remote follow ups, and quarterly patient-interrogations).

c Assumes 60 bpm LRL; DDDR mode; 100% biventricular pacing; 15% atrium pacing and 0.4 ms pacing Pulse Width (RA, RV, LV); RA Impedance 500 Ω; sensors On.

d Projected longevity is calculated assuming 3 maximum energy charging cycles per year, including automatic capacitor re-forms and therapeutic shocks. For the final year of device service, an additional 5 charging cycles are assumed to account for additional automatic capacitor re-forms as the device approaches the Explant indicator. These calculations also assume 3-channel EGM Onset is set to On, and that the pulse generator spends 6 months in Storage mode during shipping and storage.

See More

Longevity Information

  • For longevity calculations based on different settings please contact Boston Scientific technical services or your local representative.
  • Boston Scientific devices have a limited product warranty of 6 years in available geographies. 
  • Devices use Li/MnO2 battery chemistry.
  • The usable battery capacity is 1.9 Amp-hours (typical implant to battery capacity depleted).
  • Shelf life is 2 years (before use by date).


Rhythm Management reimbursement resources

Follow Boston Scientific Cardiology: Twitter LinkedIn YouTube Google+