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InSync III Marquis Model 7279 Cardioverter Defibrillator Cardiac Resynchronization System

This study has been completed.
Information provided by:
Medtronic Cardiac Rhythm and Heart Failure Identifier:
First received: December 28, 2005
Last updated: December 20, 2007
Last verified: December 2007

People who have a dangerously fast heart beat, or whose heart is at risk of stopping beating, may be in need of an electronic device called an implantable cardioverter defibrillator (ICD). An ICD is implanted surgically just under the skin in the upper chest area and it sends a strong electrical impulse, or shock, to the heart to return it to a normal rhythm. If the heart is beating too slowly or at an abnormal rhythm, an ICD can also pace the heart to return the heart to its normal rhythm.

The InSync III Marquis device can change the timing of when the left and right ventricles of the heart are paced to beat. This is called "V to V timing". V to V timing may further improve the pumping function of the heart. The purpose of this study is to determine whether or not this V to V timing feature of the InSync III Marquis system is safe and effective.

Condition Intervention
Heart Failure Device: Cardiac resynchronization therapy

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double
Primary Purpose: Treatment
Official Title: InSync III Marquis Model 7279 Cardioverter Defibrillator Cardiac Resynchronization System

Resource links provided by NLM:

Further study details as provided by Medtronic Cardiac Rhythm and Heart Failure:

Primary Outcome Measures:
  • To evaluate the safety and effectiveness of the InSync III Marquis Model 7279 in heart failure patients who were indicated for an ICD

Secondary Outcome Measures:
  • Rate of oxygen uptake (consumption) measured during exercise, all adverse events, echocardiographic assessments (tests done using ultra sound to examine the health of the heart), and device performance

Estimated Enrollment: 238
Study Start Date: March 2003
Estimated Study Completion Date: April 2005

Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

Subject has, or is at risk of having, a heart beat that is too fast and his/her doctor has determined the need for an implantable cardioverter defibrillator.

Subject is on optimal medical treatment for heart failure.

Subject has reduced left ventricular ejection fraction (LVEF≤35%). (LVEF is a measurement of how well the left ventricle pumps blood out to the rest of the body. The higher the LVEF the more blood the ventricle is pumping.)

Subject who has heart failure which severely limits daily activities (NYHA Class III) or subject who has severe heart failure and should always be resting (NYHA Class IV)

Subject who has a QRS≥130ms (The QRS interval is a measurement of how the electrical signal involved in a heart beat travels/conducts through the ventricles. A wide QRS (more than 120 ms) suggests that there is a conduction problem (or block) in the ventricles.)

Subjects with a left ventricular end diastolic dimension (LVEDD≥55mm). (The LVEDD is a measurement taken during an echocardiogram that is one indication of the health of the left ventricle.)

Exclusion Criteria:

Subject has unstable chest pain, heart surgery within past 3 months

Subject has liver function tests greater than 3 times normal limits

Subject has chronic (permanent) atrial arrhythmias (fast heart beats in the upper chamber(s) of the heart)

  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: NCT00271232

  Show 34 Study Locations
Sponsors and Collaborators
Medtronic Cardiac Rhythm and Heart Failure
  More Information

Publications automatically indexed to this study by Identifier (NCT Number): Identifier: NCT00271232     History of Changes
Other Study ID Numbers: 199
Study First Received: December 28, 2005
Last Updated: December 20, 2007

Keywords provided by Medtronic Cardiac Rhythm and Heart Failure:
Heart Failure, Cardiac Resynchronization

Additional relevant MeSH terms:
Heart Failure
Heart Diseases
Cardiovascular Diseases processed this record on August 22, 2017