Syncope: Pacing or Recording in the Later Years (Spritely)

This study is currently recruiting participants. (see Contacts and Locations)
Verified June 2014 by University of Calgary
Vanderbilt University
Information provided by (Responsible Party):
Dr. Bob Sheldon, University of Calgary Identifier:
First received: August 22, 2011
Last updated: June 24, 2014
Last verified: June 2014

Syncope affects about 50% of Canadians, is the cause of 1 - 2% of all emergency room visits, and probably is responsible for CDN $250 million in health care spending each year. It is associated with decreased quality of life, trauma, loss of employment, and limitations in daily activities. It is a particular problem for older people, partly because of increased frailty, and partly because of a difficult differential diagnosis. One of the causes in older adults is intermittent complete heart block in the setting of bifascicular heart block, but they may also faint due to a variety of tachyarrhythmias, sick sinus syndrome, and several neurally mediated syncopes. Often treatment decisions should be made before the true cause is apparent.

Condition Intervention Phase
Heart Block
Conduction Disorder of the Heart
Procedure: pacemaker
Procedure: implantable loop recorder
Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: Syncope: Pacing or Recording in the Later Years (SPRITELY)

Resource links provided by NLM:

Further study details as provided by University of Calgary:

Primary Outcome Measures:
  • The primary outcome measure will be a composite of Major Adverse Study-Related Events (MASRE) in a 2-year observation period. [ Time Frame: 2 years ] [ Designated as safety issue: Yes ]
    MASRE will capture the major consequences ensuing from both strategies, including 1) syncope, 2) symptomatic bradycardias, 3) asymptomatic complete heart block, 4) acute and chronic pacemaker and ILR complications, and 5) death.

Secondary Outcome Measures:
  • Secondary outcome measures will include total number of syncopal spells. [ Time Frame: 2 years ] [ Designated as safety issue: Yes ]
  • Secondary outcome measures will include the likelihood of a first recurrence of syncope. [ Time Frame: 2 years ] [ Designated as safety issue: Yes ]
  • Secondary outcome measures will include the physical trauma due to syncope. [ Time Frame: 2 years ] [ Designated as safety issue: Yes ]
  • Secondary outcome measures will include quality of life of the participants. [ Time Frame: 2 years ] [ Designated as safety issue: No ]

Estimated Enrollment: 120
Study Start Date: August 2011
Estimated Study Completion Date: December 2016
Estimated Primary Completion Date: December 2016 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: implantable loop recorder Procedure: implantable loop recorder
The implantable loop recorder will be programmed for automatic detection using settings of Low Heart Rate <50 bpm, High Heart Rate >165 bpm, and Pause > 3 seconds.
Active Comparator: pacemaker Procedure: pacemaker

A single or dual chamber pacemaker will be implanted according to the manufacturer's instructions for use with standard techniques.

Either a single or dual chamber pacemaker will be permitted according to local practice unless the patient is in chronic or persistent atrial fibrillation, in which case a single chamber pacemaker will be used. The pacemaker configuration will be at the discretion of the investigator.

Single chamber ventricular pacemakers will be programmed to activity responsiveness off in VVI mode, rates 50-120 bpm.

Dual chamber pacemaker programming will be to DDD mode (50-120) with mode switch on.

Detailed Description:

There are two general approaches to the patient with syncope and bifascicular block, a common substrate for intermittent heart block. The first is to assume that intermittent heart block is the cause, and simply implant a pacemaker. The second is to implant a digital ECG loop recorder with a lifespan of 2 - 3 years, determine the rhythm abnormalities during the next faint, and treat accordingly. Both approaches expose patients to a risk of fainting and its sequelae, and both carry device-related complications.Which approach is superior is unknown.


Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

-Patients are eligible if they have:

  • >1 syncopal spell within 1 year preceding enrollment, and
  • bifascicular block on a 12-lead ECG, and
  • Age > 50 years and
  • written informed consent. Syncope will be defined based on history using a standardized form.

Exclusion Criteria:

-Patients will be excluded if they have criteria related to study strategies, including:

  1. previous pacemaker, ICD, or Implantable Loop Recorder in situ,
  2. ACC/AHA/HRS Class I indication for permanent pacing or ICD implantation,
  3. left ventricular ejection fraction < 35% mandating ICD therapy,
  4. contra-indication to a transvenous pacemaker such as artificial tricuspid valve or active sepsis.

    -Patients will also be excluded if a potential competing cause of syncope poses a threat to life, such as:

  5. hypertrophic cardiomyopathy,
  6. documented sustained ventricular tachycardia or
  7. inducible, sustained monomorphic ventricular tachycardia on EP study.

    -They will be excluded if they have:

  8. a history of myocardial infarction within 3 months prior to enrollment, and
  9. a major chronic co-morbid medical condition that would preclude 24 months of follow-up.
  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: NCT01423994

Contact: Robert S Sheldon, MD, PhD 403-220-8191

United States, Tennessee
Vanderbilt University Recruiting
Nashville, Tennessee, United States, 37232
Contact: Satish Raj, MD    615-343-6499   
Principal Investigator: Satish Raj, MD         
Canada, Alberta
University of Calgary Recruiting
Calgary, Alberta, Canada, T2N 4Z6
Contact: Robert S Sheldon, MD, PhD    403-220-8191   
Principal Investigator: Robert Sheldon, MD         
Royal Alexandra Hospital Recruiting
Edmonton, Alberta, Canada, T6G 1K8
Contact: Randall Williams, MD         
Principal Investigator: Randall Williams, MD         
Canada, British Columbia
Victoria Heart Institute Recruiting
Victoria, British Columbia, Canada, V8R 4R2
Contact: Tony Tang, MD    250-595-0400      
Principal Investigator: Tony Tang, MD         
Canada, Manitoba
St. Boniface Hospital Recruiting
Winnipeg, Manitoba, Canada, R2H 2A6
Contact: Colette Seiffer, MD    204-233-8563 ext 1267      
Principal Investigator: Colette Seiffer, MD         
Canada, New Brunswick
Horizon Health Network New Brunswick Recruiting
Saint John, New Brunswick, Canada, E2L 4L2
Contact: Satish Toal, MD    506-648-7459      
Principal Investigator: Satish Toal, MD         
Canada, Ontario
Mc Master University Recruiting
Hamilton, Ontario, Canada, L8L 8E7
Contact: Carlos Morillo, MD    905-527-4322 ext 44450      
Principal Investigator: Carlos Morillo, MD         
Queen's University Recruiting
Kingston, Ontario, Canada, K7L 3N6
Contact: Adrian Baranchuk, MD    613-549-6666      
Principal Investigator: Adrian Baranchuk, MD         
London Health Sciences Centre Recruiting
London, Ontario, Canada, N6A 3K7
Contact: Raymond Yee, MD         
Principal Investigator: Raymond Yee, MD         
Canada, Quebec
Montreal Heart Institute Recruiting
Montreal, Quebec, Canada, H1T 1C8
Contact: Mario Talajic, MD    514-376-3330      
Principal Investigator: Mario Talajic, MD         
Centre Hospitalier Universitaire de Sherbrooke Recruiting
Sherbrooke, Quebec, Canada, J1H 5N4
Contact: Felix Ayala-Paredes, MD    819-346-1110 ext 74947      
Contact: Claude Jean    819-346-1110 ext 16317      
Principal Investigator: Felix Ayala-Paredes, MD         
Canada, Saskatchewan
Prairie Vascular Research Inc. Recruiting
Regina, Saskatchewan, Canada, S4P 0W5
Contact: Omar Sultan, MD   
Contact: Sheila Kelly, RN    306-522-7275   
Principal Investigator: Omar Sultan, MD         
University of Occupational and Environmental Health Recruiting
Kitakyushu, Japan
Contact: Haruhiko Abe, MD    81936917514   
Principal Investigator: Haruhiko Abe, MD         
Shwa General Hospital Recruiting
Saitama, Japan
Contact: Toshiyuki Furukawa, MD    81-44-977-8111   
Principal Investigator: Toshiyuki Furukawa, MD         
University Malaya Medical Centre Recruiting
Kuala Lumpur, Malaysia
Contact: Maw Pin Tan, MD    60163328600   
Principal Investigator: Maw Pin Tan, MD         
United Kingdom
Kings College Hospital Recruiting
London, United Kingdom
Contact: Nick Gall, MD   
Contact: Jonathan Breeze    0203 299 1285   
Principal Investigator: Nick Gall, MD         
James Cook University Hospital Recruiting
Middlesbrough, United Kingdom
Contact: Nick Linker, MD   
Contact: Beverly Atkinson    011-44-1-642-282-412      
Principal Investigator: Nick Linker         
Sponsors and Collaborators
Canadian Institutes of Health Research (CIHR)
Vanderbilt University
Principal Investigator: Robert S Sheldon, MD, PhD University of Calgary
  More Information

No publications provided

Responsible Party: Dr. Bob Sheldon, Professor of Cardiac Sciences, Medicine and Medical Genetics, University of Calgary Identifier: NCT01423994     History of Changes
Other Study ID Numbers: CIHR#230880
Study First Received: August 22, 2011
Last Updated: June 24, 2014
Health Authority: Canada: Health Canada
United States: Institutional Review Board

Keywords provided by University of Calgary:
implantable loop recorder
heart block
bifascicular heart block

Additional relevant MeSH terms:
Arrhythmias, Cardiac
Heart Block
Cardiovascular Diseases
Consciousness Disorders
Heart Diseases
Nervous System Diseases
Neurobehavioral Manifestations
Neurologic Manifestations
Pathologic Processes
Signs and Symptoms
Unconsciousness processed this record on May 21, 2015