More Options Available With a Quadripolar LV Lead pRovidE In-clinic Solutions to CRT Challenges (MORE-CRT)

This study has been completed.
Information provided by (Responsible Party):
St. Jude Medical Identifier:
First received: November 30, 2011
Last updated: September 18, 2014
Last verified: September 2014

This investigation is designed with the hypothesis that using a quadripolar left ventricular lead results in less interventions when dealing with high pacing thresholds and Phrenic Nerve Stimulation (PNS), both at implant and during follow-up, compared to standard bipolar left ventricular leads.

Condition Intervention
Postoperative Cardiac Complication
Heart Failure,
Left Ventricular Cardiac Dysfunction
Inappropriate Phrenic Nerve Stimulation
Perioperative/Postoperative Complications
Procedure: Standard Left Ventricular (LV) lead
Device: Quartet Left Ventricular (LV) lead

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Safety Study
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Prevention
Official Title: More Options Available With a Quadripolar Left Ventricular (LV) Lead pRovidE In-clinic Solutions to Cardiac Resynchronization Therapy (CRT) Challenges

Resource links provided by NLM:

Further study details as provided by St. Jude Medical:

Primary Outcome Measures:
  • Lead performance [ Time Frame: 6 months ] [ Designated as safety issue: Yes ]
    measures the intra-procedural and post-procedural performance of St. Jude Medical Left Ventricular (SJM LV) quadripolar Quartet lead compared to any other standard bipolar Left Ventricular (LV) lead

Secondary Outcome Measures:
  • Percentage of Cardiac Resynchronization Therapy responders [ Time Frame: 6 months ] [ Designated as safety issue: No ]
    Percentage of Cardiac Resynchronization Therapy (CRT) responders measured by a decrease of at least 10% of Left Ventricle End-Systolic Volume (LVESV)

  • Implant duration [ Time Frame: Until completion of implantation procedure ] [ Designated as safety issue: No ]
    The total implant procedure duration time will be compared between the control and the treatment group.

Enrollment: 1079
Study Start Date: November 2011
Study Completion Date: May 2014
Primary Completion Date: May 2014 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: Study Group
Patients in the Study group will be implanted with St. Jude Medical (SJM) quadripolar Left Ventricular (LV) lead Quartet
Device: Quartet Left Ventricular (LV) lead
Implantation of quadripolar Left ventricular (LV) lead Quartet
Active Comparator: Control Group
Patients in the Control Group will be implanted with a standard (regulatory approved and commercially available) bipolar left ventricular lead from other companies (non St. Jude Medical leads)
Procedure: Standard Left Ventricular (LV) lead
Implantation of standard Left Ventricular (LV) lead


Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Patients are indicated for Cardiac Resynchronization Therapy with Defibrillation backup device (CRT-D) implantation, as per current international certified guidelines
  • Patients age is 18 years or greater
  • Patients must indicate their understanding of the study and willingness to participate by signing the appropriate informed consent form
  • Patients must be willing and able to comply with all study requirements

Exclusion Criteria:

  • Patients with a life expectancy <12 months.
  • Patients who are or may potentially be pregnant.
  • Patient has suffered any of the following in the 4 weeks prior to enrolment:

    • Myocardial Infarction (MI)
    • Coronary Artery Bypass Graft (CABG)
    • Unstable Angina Pectoris
  • Patient has primary valvular disease which has not been corrected
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01510652

  Show 64 Study Locations
Sponsors and Collaborators
St. Jude Medical
Principal Investigator: Giuseppe Boriani, Pro. Policlinico Universitario S. Orsola e Malpighi, Bologna, Italy
  More Information

No publications provided

Responsible Party: St. Jude Medical Identifier: NCT01510652     History of Changes
Other Study ID Numbers: CR-11-006-HF-ID
Study First Received: November 30, 2011
Last Updated: September 18, 2014
Health Authority: Belgium: Ethics Committee
Germany: Ethics Commission
Italy: Ethics Committee
Netherlands: Independent Ethics Committee

Keywords provided by St. Jude Medical:
Cardiac Resynchronization therapy,
Heart Failure,
Left Ventricular Lead,
Quadripolar Left ventricular Lead,
Phrenic Nerve Stimulation,
Intra and post operative related complications

Additional relevant MeSH terms:
Heart Failure
Postoperative Complications
Cardiovascular Diseases
Heart Diseases
Pathologic Processes processed this record on October 09, 2015