Try our beta test site
IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more...

APPROPRIATE - Rate Adaptive Pacing Sensor (APPROPRIATE)

This study has been terminated.
(Difficulty in enrollment; higher than planned patient attrition and data attrition)
Information provided by:
Boston Scientific Corporation Identifier:
First received: September 19, 2008
Last updated: February 23, 2011
Last verified: February 2011
The APPROPRIATE study will compare differences in functional capacity (peak VO2) between chronotropically incompetent patients randomized to receive rate responsive pacing driven by either the minute ventilation (respiration-based) sensor or an accelerometer (motion-based).

Condition Intervention Phase
Heart Diseases
Device: Rate adaptive pacemaker
Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double Blind (Participant, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Assessment of Proper Physiologic Response With Rate Adaptive Pacing Driven by Minute Ventilation or Accelerometer

Further study details as provided by Boston Scientific Corporation:

Primary Outcome Measures:
  • Improvement in peak VO2. [ Time Frame: 1 month and 2 months post-implant ]

Secondary Outcome Measures:
  • Changes in heart rate during Activities of Daily Living (ADL) using a lift and carry test [ Time Frame: 2 months post-implant ]
  • Metabolic chronotropic relationship (MCR) slope [ Time Frame: 1 month and 2 months post-implant ]
  • Exercise time [ Time Frame: 1 month and 2 months post-implant ]
  • VO2 at ventilatory threshold [ Time Frame: 1 month and 2 months post-implant ]

Estimated Enrollment: 1000
Study Start Date: October 2008
Estimated Study Completion Date: August 2012
Estimated Primary Completion Date: June 2012 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: 1
Device: Rate adaptive pacemaker
Accelerometer sensor
Active Comparator: 2
Minute ventilation
Device: Rate adaptive pacemaker
Minute ventilation sensor


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

Inclusion Criteria:

  • Meets or met current pacemaker implantation indications
  • Willing and capable of providing informed consent for participation
  • Receiving a dual-chamber pacemaker or previously received a dual-chamber pacemaker with active atrial and ventricular leads
  • Plans to remain in the long-term care of his/her enrolling physician and is available for study follow-up for three months post-enrollment

Exclusion Criteria:

  • Mobitz II second degree heart block
  • Third degree heart block
  • Chronic atrial fibrillation or uncontrolled atrial arrhythmias within the past 90 days prior to consent
  • Neuromuscular, orthopedic, or vascular disability that prevents normal walking or weight carrying (e.g., intermittent claudication, arthritis, residual stroke weakness, need for a wheelchair or walker)
  • A symptom-limited exercise protocol is thought to be dangerous or contra-indicated, including but not limited to changing pattern of chest discomfort or uncontrolled arrhythmias
  • Pulmonary disease as defined by any one of the following:

    • Forced Vital Capacity (FVC) or Forced Expiratory Volume in one second (FEV1) < 60% of predicted values
    • Use of two or more pulmonary inhalers
    • Use of supplemental oxygen
    • Chronic use of oral steroids for pulmonary disease treatment
  • Life expectancy is less than 12 months due to other medical conditions, per physician discretion
  • Has or indicated for an implantable cardioverter defibrillator (ICD) or cardiac resynchronization therapy-defibrillator (CRT-D)
  • Currently enrolled in another investigational study that would directly impact the treatment or outcome of the current study.
  • Younger than 18 years of age
  • Pregnant or planning to become pregnant during the study (method of assessment upon physician's discretion)
  • Unable or unwilling to comply with the protocol requirements
  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: NCT00757666

United States, Arkansas
Cardiology Association of NE Arkansas
Jonesboro, Arkansas, United States
United States, Iowa
Genesis Heart Institute
Davenport, Iowa, United States
Sponsors and Collaborators
Boston Scientific Corporation
Principal Investigator: Michael Giudici, MD Genesis Heart Institute
Principal Investigator: F. Roosevelt Gilliam, MD Cardiology Associates of NE Arkansas
  More Information

Responsible Party: Director, Clinical Affairs, Boston Scientific CRM Identifier: NCT00757666     History of Changes
Other Study ID Numbers: CR-CA-082808-B
Study First Received: September 19, 2008
Last Updated: February 23, 2011

Keywords provided by Boston Scientific Corporation:

Additional relevant MeSH terms:
Heart Diseases
Cardiovascular Diseases processed this record on May 24, 2017