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The Danish Multicenter Randomised Study on AAI Versus DDD Pacing in Sick Sinus Syndrome

This study has been terminated.
(Not able to recruit the estimated number of patients)
Information provided by:
The DANPACE Investigator Group Identifier:
First received: October 10, 2005
Last updated: February 20, 2009
Last verified: February 2009

Hypothesis Treatment with rate adaptive single chamber atrial pacing (AAIR) reduces the risk of death compared with rate adaptive dual chamber pacing (DDDR) in patients with sick sinus syndrome (SSS).

Primary purpose The primary purpose of this randomised trial is to compare AAIR and DDDR pacing in patients with SSS and normal atrioventricular (AV) conduction with respect to the primary end point overall mortality.

Condition Intervention Phase
Sick Sinus Syndrome Device: AAIR/DDDR pacemaker Phase 2 Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: The Danish Multicenter Randomised Study on AAI Versus DDD Pacing in Sick Sinus Syndrome

Resource links provided by NLM:

Further study details as provided by The DANPACE Investigator Group:

Primary Outcome Measures:
  • All cause mortality after a mean follow-up of 5.5 year. [ Time Frame: 5,5 years ]

Secondary Outcome Measures:
  • Cardiovascular death [ Time Frame: 5,5 years ]
  • Chronic atrial fibrillation [ Time Frame: 5,5 years ]
  • Paroxysmal atrial fibrillation [ Time Frame: 5,5 years ]
  • Arterial thromboembolism [ Time Frame: 5,5 years ]
  • Congestive heart failure [ Time Frame: 5,5 years ]
  • Need for pacemaker re-operations [ Time Frame: 5,5 years ]
  • Quality of life [ Time Frame: 5,5 years ]
  • Health economics [ Time Frame: 5,5 years ]

Enrollment: 1415
Study Start Date: March 1999
Estimated Study Completion Date: July 2010
Estimated Primary Completion Date: July 2010 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
AAIR Device: AAIR/DDDR pacemaker
Pacemaker with single lead or dual lead
DDDR Device: AAIR/DDDR pacemaker
Pacemaker with single lead or dual lead

  Show Detailed Description


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

Inclusion Criteria:


A. Undergoing primary pacemaker implantation B. Able to appear for outpatient follow-up C. Age > 18 years


D. Syncope or E. Dizzy spells or F. Congestive heart failure


G. Sinus bradycardia <40/minute for at least 1 minute in a conscious awake state or H. Sinus arrest/sinoatrial block >2 seconds or I. Bradycardia/tachycardia with sinus-pauses >2 seconds

Exclusion Criteria:


A. Malignant disease. B. Severe psychogenic disease including severe decrepitude and dementia. C. Impending larger operation expected to influence the major end point. D. Cardiac disorder expected to need cardiac surgery during the follow-up period.

E. Need for other device implantation: ICD (implantable cardioverter defibrillator) or implantable DC converter (for atrial fibrillation).

F. Carotid sinus syndrome (positive carotid sinus massage with pauses >3 seconds).


G. Atrioventricular block. H. Bundle-branch block (complete RBBB, LBBB, bifascicular bundle-branch block or non-specific intraventricular block with QRS >0.12 seconds).

I. Chronic atrial fibrillation. J. Atrial fibrillation/atrial flutter with QRS pauses >3 seconds during atrial fibrillation.

K. Atrial fibrillation/atrial flutter with QRS frequency <40/minute for 1 minute.

  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: NCT00236158

Department of Cardiology, Skejby Sygehus, Aarhus University Hospital
Aarhus, Denmark, DK-8200
Sponsors and Collaborators
The DANPACE Investigator Group
Principal Investigator: Henning R Andersen, MD, DMSc Skejby Sygehus, Aarhus University Hospital
  More Information

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Henning Rud Andersen, Aarhus University Hospital Skejby, Departm. of Cardiology Identifier: NCT00236158     History of Changes
Other Study ID Numbers: 25100
Study First Received: October 10, 2005
Last Updated: February 20, 2009

Additional relevant MeSH terms:
Sick Sinus Syndrome
Pathologic Processes
Arrhythmia, Sinus
Arrhythmias, Cardiac
Heart Diseases
Cardiovascular Diseases
Heart Block processed this record on September 21, 2017