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Implantable Loop Recorder Versus Conventional Ambulatory Monitoring in Detecting Atrial Fibrillation After Pulmonary Vein Isolation

This study has been completed.
Information provided by (Responsible Party):
Axel Brandes, Odense University Hospital Identifier:
First received: June 11, 2008
Last updated: September 27, 2016
Last verified: September 2016

The primary aim of the study is to assess the efficacy of continuous rhythm monitoring with an implantable loop recorder (ILR) compared to conventional ambulatory electrocardiography in detecting episodes of atrial fibrillation after pulmonary vein isolation (PVI). The secondary aim is to assess the efficacy of PVI during a two years follow-up and to assess the reliability of the implantable loop recorder in detecting atrial fibrillation.

50 patients will be enrolled into the study. After enrollment an implantable loop recorder will be implanted at least 6 weeks before scheduled PVI. All patients will be followed for 24 months after PVI. During the follow-up period a 72-hours ambulatory electrocardiographic monitoring will be performed at 1, 6, 12, 18, and 24 months. Transthoracic echocardiography will be performed at enrollment, 3, 12, and 24 months after PVI. Moreover, quality of life will be assessed at baseline, and 6 and 12 months after PVI.

Condition Intervention
Atrial Fibrillation Device: Implantable loop recorder (ILR)

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Diagnostic
Official Title: An Observational Study to Assess the Efficacy of Continuous Subcutaneous Arrhythmia Monitoring Versus Conventional Ambulatory ECG-monitoring in Detecting Atrial Fibrillation in Patients After Pulmonary Vein Isolation

Resource links provided by NLM:

Further study details as provided by Axel Brandes, Odense University Hospital:

Primary Outcome Measures:
  • Number of patients with atrial fibrillation detected by implantable loop recorder and number of patients with atrial fibrillation detected by conventional ambulatory electrocardiographic monitoring [ Time Frame: 12 months ]

Secondary Outcome Measures:
  • Number of asymptomatic and symptomatic atrial fibrillation episodes [ Time Frame: 12 months ]
  • Number of symptomatic and asymptomatic atrial fibrillation episodes [ Time Frame: 12 months ]

Enrollment: 57
Study Start Date: June 2008
Study Completion Date: June 2016
Primary Completion Date: June 2015 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: 1
There is only one group in this cohort study.
Device: Implantable loop recorder (ILR)
The ILR will be implanted subcutaneous following standard surgical procedure.
Other Name: All patients in the group get an ILR implanted.


Ages Eligible for Study:   30 Years to 70 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Age => 30 to =< 70 years
  • Documentation of paroxysmal atrial fibrillation
  • Documentation of persistent atrial fibrillation of < 3 months duration termination either spontaneously or by DC cardioversion
  • Scheduled pulmonary vein isolation
  • Treatment with at least one class IC or class III antiarrhythmic drug tried

Exclusion Criteria:

  • Atrial fibrillation episodes > 3 months or permanent atrial fibrillation
  • No indication for pulmonary vein isolation
  • Contraindications for anticoagulation treatment
  • No informed consent
  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: NCT00697359

Odense University Hospital
Odense, Denmark, 5000
Russian Federation
Academician E. N. Meshalkin
Novosibirsk, Russian Federation, 630055
Örebro University Hospital
Örebro, Sweden, 70185
Sponsors and Collaborators
Odense University Hospital
Principal Investigator: Axel Brandes, MD Odense University Hospital
  More Information

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Axel Brandes, Associate Professor, Odense University Hospital Identifier: NCT00697359     History of Changes
Other Study ID Numbers: AF-ABL-R-001
Study First Received: June 11, 2008
Last Updated: September 27, 2016
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

Keywords provided by Axel Brandes, Odense University Hospital:
Atrial fibrillation
Pulmonary vein isolation
Implantable loop recorder

Additional relevant MeSH terms:
Atrial Fibrillation
Arrhythmias, Cardiac
Heart Diseases
Cardiovascular Diseases
Pathologic Processes processed this record on September 21, 2017