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


Product Details


Models G140, G141, G146, and G148

  • 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 (0.86 mm) tapered lead tip to improve predictability of accessing target vessels.
  • Projected to last 8+ years under true usage conditions.
  • This small (32.0 cm3) and thin (9.9 mm) high-energy device is designed to enhance patient comfort.
  • Offers 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).
  • Offers AcuShock™ 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.
  • 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

ModelTypeSize (cm)
(W x H x D)
Mass (gr)Volume (cm3)Connector Type
G148X4-CRT-D5.37 x 8.18 x 0.9973.832.5RA:IS-1; RV:DF4; LV:IS4
5.37 x 8.08 x 0.9973.432.0RA:IS-1; RV:IS-1/DF–1; LV:IS4
G140CRT-D5.37 x 8.18 x 0.9973.632.5RA:IS-1; RV:DF4; LV:IS-1
G141CRT-D5.37 x 8.08 x 0.9972.832.0RA:IS-1; RV:IS-1/DF–1; LV:IS-1

Pulse Generator Longevity (All Models ᵃ, ᵇ, ᶜ, ᵈ)

Pacing AmplitudeLongevity (years) at 500Ω and 700Ω 
Pacing Impedance (RV and LV)
2.5 V3.0 V8.18.6
2.5 V3.5 V7.68.2
3.5 V3..5 V6.87.5
3.5 V5.0 V5.76.5

Longevity Information

  • For longevity calculations based on different settings please contact Boston Scientific
    technical services or your local representative.
  • Boston Scientific devices have corporate warranties at 6 years in available geographies.
  • 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).