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Finding Atrial Fibrillation in Patients With Unexplained Stroke Using Longterm Cardiac Monitoring (SURPRISE)

The recruitment status of this study is unknown because the information has not been verified recently.
Verified July 2014 by Bispebjerg Hospital.
Recruitment status was  Active, not recruiting
Information provided by (Responsible Party):
Hanne Christensen, Bispebjerg Hospital Identifier:
First received: December 21, 2011
Last updated: July 15, 2014
Last verified: July 2014
The SURPRISE study investigates atrial fibrillation(AFIB) in patients with a previous unexplained stroke. It uses long term monitoring of the heart of up to three years, searching for paroxysmal atrial fibrillation(PAF) otherwise undetected in this population.


Study Type: Observational
Study Design: Time Perspective: Prospective
Official Title: Stroke Prior to Diagnosis of Atrial Fibrillation Using Longterm Observation With Implantable Cardiac Monitoring Apparatus Reveal(SURPRISE) -the SURPRISE Study

Resource links provided by NLM:

Further study details as provided by Bispebjerg Hospital:

Estimated Enrollment: 100
Study Start Date: April 2010
Estimated Study Completion Date: October 2014
Primary Completion Date: October 2013 (Final data collection date for primary outcome measure)
Detailed Description:

The SURPRISE study investigates the patients with cryptogenic stroke or transient ischemic attack (TIA), monitoring them with a cardiac loop recorder for up to three years.

it aims at estimating the amount of paroxysmal atrial fibrillation within our population of cryptogenic stroke patients.

Standard workup for a stroke patient does offer cardiac evaluation, but monitoring is limited to the time admitted, often just a few days.


Ages Eligible for Study:   18 Months and older   (Child, Adult, Senior)
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Sampling Method:   Probability Sample
Study Population
the patients are included from the investigators stroke unit and day clinic

Inclusion Criteria:

  • Computerized Tomography (CT) or Magnetic resonance imaging (MRI) verified cryptogenic stroke or TIA;
  • > 18 years of age,
  • the ability to provide a written consent

Exclusion Criteria:

  • prior or known AFIB
  • AF found during work up including 24 hour telemetric monitoring.
  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: NCT01498146

Bispebjerg Hospital, University Hospital of Copenhagen, dept of Neurology
Copenhagen, Denmark, DK-2400
Sponsors and Collaborators
Bispebjerg Hospital
Principal Investigator: Hanne Christensen, MD, PhD, DMSci University of Copenhagen
  More Information

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Hanne Christensen, Associate Research Professor, Consultant neurologist, Bispebjerg Hospital Identifier: NCT01498146     History of Changes
Other Study ID Numbers: H-4-2010-014 
Study First Received: December 21, 2011
Last Updated: July 15, 2014
Health Authority: Denmark: National Board of Health
Denmark: Danish Dataprotection Agency
Denmark: Ethics Committee

Keywords provided by Bispebjerg Hospital:
cryptogenic stroke
atrial fibrillation
longterm monitoring
loop recorder

Additional relevant MeSH terms:
Atrial Fibrillation
Cerebrovascular Disorders
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Vascular Diseases
Cardiovascular Diseases
Arrhythmias, Cardiac
Heart Diseases
Pathologic Processes processed this record on October 27, 2016