MOMENTUM™ X4 CRT-D and Momentum CRT-D

Powered by EnduraLife™ Battery Technology
Models G124, G125, G126, and G138

SmartCRT™ is Boston Scientific’s approach to personalise CRT therapy by providing physicians with smart solutions to optimise where, when, and how to pace. EnduraLife™ Battery Technology provides more power to use more of the device, featuring up to 13.3 years projected longevity with MultiSite Pacing turned on.*
ImageReady MR conditional Systems allows patients to receive full body MR-Conditional scans at 1.5T without exclusion zone, scan duration, or patient height restrictions.**


EnduraLife Battery Technology
EnduraLife Battery Technology offers up to 13.3 years projected longevity with MultiSite Pacing turned on.1
ImageReady MR-Conditional Systems
Your patients can safely undergo Full Body MRI scans with ImageReady MR-Conditional Systems.**
SmartCRT Technology
Personalize CRT therapy with smart solutions that allow you to optimize where, when and how to pace.

Product Details

Models G124, G125, G126 and G138

  • MOMENTUM X4 CRT-D offers SmartCRT™ technology, enabling physicians to offer a personalised care approach to all patients, including a wide range of options of where, when and how to pace.
  • EnduraLife™ battery technology can offer up to 14.7 years battery life1 and 13.3 years with MultiSite Pacing switched on1.
  • ImageReady™ with Full-body MR scans safely in 1.5 Tesla environments**
  • The X4 CRT-D and ACUITY™ X4 lead portfolio features electrodes on a 3D spiral designed to allow pacing from a basal location without sacrificing fixation or thresholds; 17 pacing vector options to manage around PNS and high thresholds; and multiple lead shapes with a 2.6F (0.86mm) tapered lead tip to improve predictability of accessing target vessels.
  • MultiSite Pacing allows 216 vector combinations to easily tailor device therapy, supported by automatic recommendations with the click of a button, for vectors and offsets in < 5 seconds.
  • Atrial Arrhythmia Report provides a comprehensive view of your patient’s AT/AF status and information for assessing AF treatment efficacy.
  • RightRate™ features Boston Scientific’s MV Sensor—the only sensor clinically proven to restore chronotropic competence.2
  • This small (32.5 cm3) and thin(9.9 mm) high-energy device is designed to enhance patient comfort.3
  • The PaceSafe™ RV, RA, and LV auto threshold feature is designed to maintain adequate output safety margins.
  • Offers AcuShock™ Advanced Technology, multiple programmable options to reduce inappropriate and unnecessary shocks, including a choice of rhythm discriminators, RhythmID™ with RhythmMatch™ (customization of Rhythm ID algorithm), antitachycardia pacing (ATP) therapy in all rates zones, and advanced sensing and filtering.
  • Wireless ECG saves time and simplifies follow-up.
  • EasyView™ header and color coded lead ports designed to make the implant experience more efficient.
  • SafetyCore™ technology is intended to provide lifesaving shock therapy and basic pacing functionality in the event of an unrecoverable fault.


Mechanical Specifications

Size (cm)
(W x H x D)
Connector Type
G138X4 CRT-D5.37 x 8.08 x 0.9973.432.0RA:IS-1;RV:IS-1/DF-1;LV:IS4Yes
G124CRT-D5.37 x 8.18 x 0.9973.632.5RA:IS-1;RV:DF4;LV:IS-1Yes
G125CRT-D5.37 x 8.08 x 0.9972.832.0RA:IS-1;RV:IS-1/DF-1;LV:IS-1Yes
G126CRT-D5.37 x 8.18 x 0.9972.932.0RA:IS-1;RV:IS-1/DF-1;LV:LV-1No

Pulse Generator Longevity (All Modelsa,b,c,d,e,f)

EnduraLife™ Battery Technology provides clinically-proven, industry-leading projected longevity.*** The following tables represent sample pulse generator life expectancy estimation (implant to explant) with EnduraLife™ battery as provided in product labeling.

MultiSite Pacing Off

with Latitude™ᶜ
with Latitude™ᶜ
no Latitude™,
Typical programmed settingBiV2.5 V3.0 VOff9.710.511.3
Maximum labelled longevityLV-Only2.0 V / Off2.0 VOff12.913.214.7

MultiSite Pacing On

with Latitude™ᶜ
with Latitude™ᶜ
no Latitude™,
Typical programmed settingBiV MSP2.5 V3.0 V3.0 V8.29.19.7
Maximum labelled longevityLV-Only MSP2.0 V / Off2.0 V2.0 V11.512.113.3

Additional Longevity Information

  • Warranty information available at
  • Devices use Li/MnO2 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).