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

This study has been completed.
ClinicalTrials.gov Identifier:
First Posted: January 16, 2012
Last Update Posted: November 6, 2017
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Information provided by (Responsible Party):
St. Jude Medical
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: BiP Group Device: Quad Group

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (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

Further study details as provided by St. Jude Medical:

Primary Outcome Measures:
  • Lead Performance [ Time Frame: 6 months ]

    Percentage of patients with freedom from event (intra- and post-operative). Intra-operative events were defined as: need to use more than 1 left ventricular lead, need to change lead implant position, use of any device to actively fixate the lead, unsuccessful implant, due to phrenic nerve stimulation, high pacing threshold or lead instability.

    Post-operative events were defined as any left ventricular lead related serious adverse device effect and CRT switched off.

Secondary Outcome Measures:
  • Percentage of Cardiac Resynchronization Therapy Responders [ Time Frame: Baseline and 6 months ]
    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: Total duration of the implant procedure reported at the end of the procedure ]
    This measure reports the length (in time) of the implantation procedure. The measurement start at skin incision and stop at skin suture (so called skin-to-skin time) The total implant procedure duration time will be compared between the control and the treatment group.

Enrollment: 1078
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: Quad Group
Patients in the Quad group will be implanted with St. Jude Medical (SJM) quadripolar Left Ventricular (LV) lead Quartet
Device: Quad Group
Implantation of quadripolar Left ventricular (LV) lead Quartet
Active Comparator: BiP Group
Patients in the BiP 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: BiP Group
Implantation of standard Left Ventricular (LV) lead


Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
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
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): 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

Responsible Party: St. Jude Medical
ClinicalTrials.gov Identifier: NCT01510652     History of Changes
Other Study ID Numbers: CR-11-006-HF-ID
First Submitted: November 30, 2011
First Posted: January 16, 2012
Results First Submitted: August 14, 2015
Results First Posted: October 23, 2015
Last Update Posted: November 6, 2017
Last Verified: October 2017

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
Heart Diseases
Cardiovascular Diseases
Pathologic Processes