We're revolutionizing CRT Pacing.
Hear what physicians are saying.

Key opinion leaders highlight the value of remote patient management.

Unify Quadra® CRT-D

This device is commercially available for use in the United States.

Revolutionizing CRT Pacing Options

UNIFY_QUADRA_CD3249-BlkBG_700x227px

The Unify Quadra CRT-D and Quartet® LV pacing lead feature first-to-market quadripolar technology. With four electrodes and ten pacing configurations, this innovative CRT system enables LV pacing at the preferred site without compromising lead stability for better management of heart failure patients.

Quadripolar technology offers:


  • More basal pacing opportunities without compromising lead stability.  Studies have shown pacing more basally to be associated with reverse LV remodeling and improved outcomes1,2
  • More options to manage common pacing complications, such as phrenic nerve stimulation and high pacing thresholds, resulting in less need for lead repositioning and fewer surgical revisions3-6

VectSelect Quartet™ LV Pulse Configuration

 VectSelectQuartetLVPulseConfiguration_US

Other Key Features:


  • TailoredTherapy™ features designed to customize treatment to each patient’s unique needs, including:
  • ShockGuard® technology with DecisionTx® programming, designed to reduce unnecessary or inappropriate shocks resulting in 98.5% of patients being free of inappropriate shocks at 1 year7
  • DeFT Response® technology, which provides more noninvasive programming flexibility in the management of DFTs and 40J delivered energy for a greater safety margins
  • Antitachycardia pacing (ATP) while charging and prior to charging in the VF zone further extends the programming options for converting tachyarrhythmias before or during charge
  • QuickOpt® timing cycle optimization, which provides quick and effective optimization for more patients at a push of a button
  • The % BiV-Pacing alert, which notifies clinics when biventricular pacing is less than the programmed threshold
  • Automatic threshold measurements and adjustments in all chambers (RA, RV, and LV) to promote patient safety
  • Streamlined header connectors (IS4 and DF4) reduce pocket bulk
  • Built on the proven Unify® CRT-D platform, the smallest footprint of any device available without compromising longevity, quality or reliability
  • QHR® battery provides greater capacity for enhanced longevity and improved charge time performance

QHR is a registered trademark of Greatbatch Medical

*RV = 2.0 V, LV = 2.0 V, A = 2.0 V, 0.5 ms, 60 ppm, 500 ohms, 3 max charges per year, BiVCap®Confirm On

1. Singh, J.P. et al. Left ventricular lead position and clinical outcome in the Multicenter Automatic Defibrillator Implantation Trial Cardiac Resynchronization Therapy (MADIT-CRT) Trial. Circulation. 2011 Mar 22;123(11):1159-66.
2. Merchant, F.M. et al. Impact of segmental left ventricle lead position on cardiac resynchronization therapy outcomes.
Heart Rhythm. 2010 May;7(5):639-44.
3. Forleo, G.B. et al. Left ventricular pacing with a new quadripolar transvenous lead for CRT: early results of a prospective comparison with conventional implant outcomes. Heart Rhythm. 2011 Jan;8(1):31-7.
4. Data compiled from clinical study results, on file at St. Jude Medical in Report 60034670.
5. Moss, A.J. et al. Cardiac resynchronization therapy for the prevention of heart failure events.
N Engl J Med. 2009;361:1329-38.
6. Gras, D. et al. Implantation of cardiac resynchronization therapy systems in the CARE-HF trial: procedural success rate and safety. Europace. 2007 Jul;9(7):516-22.
7. Findings based on analysis from the ACT Registry, data on file at St. Jude Medical in Report 60032047.

Models CD3249-40 CD3249-40Q
Telemetry RF RF
Delivered Energy (stored) 40 J (45 J) 40 (45 J)
Volume (cc) 40 38
Weight (g) 83 81
Size (mm) 83 x 41 x 14 75 x 41 x 14
Longevity (yrs.) 7.1* 7.1*
Defibrillation Lead Connections DF-1 DF4- LLHH
LV Lead Connections IS4- LLLL IS4-LLLL
Sense/Pace Lead Connections IS-1 IS-1
High-Voltage Can Electrically active titanium can

*RV = 2.0 V, LV = 2.0 V, A = 2.0 V, 0.5 ms, 60 ppm, 500 ohms, 3 max charges per year, BiVCap®Confirm On

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