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PROTECT-PACE STUDY - The Protection of Left Ventricular Function During Right Ventricular Pacing (PROTECT-PACE)

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified May 2012 by Medtronic Cardiac Rhythm and Heart Failure.
Recruitment status was:  Active, not recruiting
Information provided by (Responsible Party):
Medtronic Cardiac Rhythm and Heart Failure Identifier:
First received: April 17, 2007
Last updated: May 14, 2012
Last verified: May 2012

This study will be done in patients who require the implantation of a cardiac pacemaker (an electronic device that controls the heartbeat) for complete heart block (a heart rhythm abnormality resulting in a slow heart beat). Pacemakers regulate the heart beat by delivering pulses of electricity through special wires (pacing leads) which are placed inside the heart.

This study will compare two groups of pacemaker patients. Each group will have their pacing leads placed in a particular location in the heart. The purpose of the study is to show whether the position used in one group is better for maintaining effective heart function compared to the position used in the other group.

The leads in one group will be placed in a position called the Right Ventricular Apex. This is the traditional and most frequently used position for pacemaker leads.

The leads in the other group will be placed in a position called the Right Ventricular High Septum. This is a less commonly used position, but may result in health benefits for the patients compared with the Right Ventricular Apex.

Condition Intervention
Left Ventricular Dysfunction
Other: RV lead placement site

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Single Blind (Subject)
Primary Purpose: Treatment
Official Title: PROTECT-PACE STUDY - The Protection of Left Ventricular Function During Right Ventricular Pacing. Does Right Ventricular High-septal Pacing Improve Outcome Compared With Right Ventricular Apical Pacing?

Resource links provided by NLM:

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

Primary Outcome Measures:
  • Comparison of change in Left Ventricular Ejection Fraction from baseline to 2 years. [ Time Frame: At 2-year follow-up ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • Incidence of atrial tachyarrhythmia recorded by the pacemakers [ Time Frame: At 2-year follow-up; and at 5-year follow-up (study extension) ] [ Designated as safety issue: No ]
  • Worsening of heart failure [ Time Frame: At 2-year follow-up; and at 5-year follow-up (study extension) ] [ Designated as safety issue: No ]

    Worsening of heart failure can be defined as:

    1. Heart failure-related hospitalization requiring intravenous heart failure therapy, or
    2. Emergency department visit for heart failure requiring intravenous heart failure therapy, or
    3. Any other visit in which the patient presents with signs or symptoms consistent with heart failure or heart failure exacerbation or marked decline in ejection fraction <35%, and intravenous heart failure therapy is required or titrate therapy.
    4. CRT-P or CRT-D upgrade.

  • All cause mortality [ Time Frame: At 2-year follow-up; and at 5-year follow-up (study extension) ] [ Designated as safety issue: No ]
  • Incidence of stroke [ Time Frame: At 2-year follow-up ] [ Designated as safety issue: No ]
  • N-Terminal Brain Natriuretic Peptide (NT-proBNP) levels [ Time Frame: At 2-year follow-up ] [ Designated as safety issue: No ]
  • Echocardiographic measures of left ventricular dyssynchrony [ Time Frame: At 2-year follow-up ] [ Designated as safety issue: No ]
  • 6 minute Hall-Walk distance [ Time Frame: At 2-year follow-up ] [ Designated as safety issue: No ]

Estimated Enrollment: 248
Study Start Date: May 2007
Estimated Study Completion Date: August 2015
Estimated Primary Completion Date: August 2012 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: RV Apex Other: RV lead placement site
Patients randomised to RV apical or high septal lead placement site
Experimental: RV High Septum Other: RV lead placement site
Patients randomised to RV apical or high septal lead placement site

Detailed Description:

There is an increasing amount of evidence to suggest that other positions in the heart may be more effective than the conventional Right Ventricular Apex (RVA) position for restoring good heart function. The best site to place a lead has not yet been proven.

This is a study comparing the long term clinical effects of two different lead positions. The measurements taken to assess the clinical effects include:

  • the effectiveness of the heart's pumping action (as measured by ultrasound scans)
  • measurements of how far patients can walk in 6 minutes
  • analysis of blood samples
  • collection of information from the pacemaker about heart rhythm problems

Half of the patients in the study will receive conventional leads placed in the more common RVA position in the heart. The other half will receive a relatively new type of lead placed in what is called the Right Ventricular High Septal (RVHS) position.

In order to fairly compare the outcomes of these two different lead positions this study has been designed as a 'randomized', 'blind' trial. This means that the group which patients will be entered into will be chosen at random and patients will not be told which group they are in.

Patients will each have an equal (50:50) chance of being in either group. By carefully comparing the clinical differences between the two groups of patients, the study aims to prove whether or not there are additional benefits for patients when the RVHS lead position is used.

All leads used in the study have been shown to be safe for patients and are available commercially for implantation. All of the implanting doctors involved in the study are experienced at implanting the pacemakers and leads that will be used in this study.


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

Inclusion Criteria:

  • Patients with high grade AV block and sinus rhythm, scheduled to undergo dual chamber pacemaker implantation OR patients with high grade AV block and permanent atrial fibrillation, scheduled to undergo single chamber ventricular pacemaker implantation.
  • Patients aged 18 years or older.

Exclusion Criteria:

  • Patients indicated for an Implantable Cardioverter Defibrillator or Cardiac Resynchronization Therapy.
  • Patients following junctional ablation.
  • Patients with a Myocardial Infarction within three months prior to enrollment.
  • Patients that received bypass surgery within three months prior to enrollment.
  • Patients that had a valve replacement within three months prior to enrollment or patients with a mechanical right heart valve.
  • Patients where a right ventricular lead cannot be placed i.e. complex congenital heart disease.
  • Patients with hypertrophic obstructive cardiomyopathy.
  • Patients with acute coronary syndrome, unstable angina, severe mitral regurgitation and/or hemodynamically significant aortic stenosis.
  • Previous implanted pacemaker or cardioverter defibrillator.
  • Known paroxysmal atrial fibrillation or a documented episode of atrial fibrillation prior to enrollment.
  • Patients on amiodarone therapy within the last six months prior to enrollment.
  • Terminal conditions with a life expectancy of less than two years.
  • Participation in any other study that would confound the results of this study.
  • Psychological or emotional problems that may interfere with the volunteer's ability to provide full consent or fully understand the purposes of the study.
  • Pregnant patients or patients who may become pregnant during the time-scale of the study.
  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: NCT00461734

Australia, Queensland
Princess Alexandra Hospital
Brisbane, Queensland, Australia
Royal Brisbane & Womens' Hospital
Brisbane, Queensland, Australia
The Prince Charles Hospital
Brisbane, Queensland, Australia
Australia, South Australia
Calvary Wakefield Hospital
Adelaide, South Australia, Australia
Flinders Medical Center
Adelaide, South Australia, Australia
Royal Adelaide Hospital
Adelaide, South Australia, Australia
New Zealand
Auckland City Hospital
Auckland, New Zealand
Christchurch Hospital
Christchurch, New Zealand
United Kingdom
Blackpool Victoria Hospital
Blackpool, United Kingdom
Royal Bournemouth Hospital
Bournemouth, United Kingdom
University Hospital of Wales
Cardiff, United Kingdom
Colchester General
Colchester, United Kingdom
Leeds General Infirmary
Leeds, United Kingdom
St. Thomas' Hospital
London, United Kingdom
James Cook University Hospital
Middlesbrough, United Kingdom
Norfolk and Norwich University Hospital
Norwich, United Kingdom
Princess Royal Hospital
Orpington, Kent, United Kingdom
New Cross Hospital
Wolverhampton, United Kingdom
Sponsors and Collaborators
Medtronic Cardiac Rhythm and Heart Failure
Study Chair: Dr. Gerald Kaye Princess Alexandra Hospital
  More Information

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Medtronic Cardiac Rhythm and Heart Failure Identifier: NCT00461734     History of Changes
Other Study ID Numbers: PROTECT-PACE Version 4 
Study First Received: April 17, 2007
Last Updated: May 14, 2012
Health Authority: United Kingdom: National Health Service
United Kingdom: Research Ethics Committee
Australia: Human Research Ethics Committee
Australia: Department of Health and Ageing Therapeutic Goods Administration
New Zealand: Medsafe

Keywords provided by Medtronic Cardiac Rhythm and Heart Failure:
Right Ventricular High Septal Pacing
Right Ventricular Apical Pacing
Left Ventricular Dysfunction
Heart Block
Atrial Fibrillation
Ejection Fraction

Additional relevant MeSH terms:
Ventricular Dysfunction
Ventricular Dysfunction, Left
Heart Diseases
Cardiovascular Diseases processed this record on December 09, 2016