Detection Rate of Atrial Fibrillation in Patients Implanted With ILRs

July 21, 2016 updated by: Peter J Pugh, Cambridge University Hospitals NHS Foundation Trust

Implantable Loop Recorders (ILRs), are subcutaneous heart monitors, which are implanted for different reasons including syncope (fainting), pre syncope (near fainting), palpitations and stroke. They monitor the heart and detect abnormalities.

Atrial fibrillation (irregular heart rhythm),is a common cardiac arrhythmia associated with a five-fold risk of stroke. Atrial Fibrillation increases the risk of stroke in patients to a different degree according to a risk stratification score. Anticoagulation is recommended to all high-risk patients.

Recent published studies have shown a high incidence of Atrial Fibrillation detected by ILRs in patients with previous stroke.

It is not known whether a similar incidence of Atrial Fibrillation occurs in patients without previous stroke. It is also not know ''how much'' Atrial Fibrillation is necessary to increase the risk of stroke, how relevant the finding of Atrial Fibrillation is and whether everybody with Atrial Fibrillation should have anticoagulation or whether a "bit of Atrial Fibrillation" is actually normal in most people.

The purpose of this study is to identify and compare the rate and the burden of Atrial Fibrillation (more or less than 30 seconds) in patients with and without previous stroke.

Medical notes and Implantable Loop Recorder records of the patients that had the devices implanted in Addendbrooke's Hospital from March 2009 up to 1 month after the implantation of the latest device will be inspected in order to identify whether the device had detected Atrial Fibrillation and if so the burden of Atrial Fibrillation in the two different groups of patients (with and without previous stroke).

The risk of stroke for each patient will be calculated. Echocardiographic (ultrasound scan of the heart)risk factors for Atrial Fibrillation will be identified and compared between the two groups.

This is going to be a retrospective study and we will be inspecting patients' data only.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Implantable Loop Recorders (ILRs), are subcutaneous heart monitors, which are implanted for different reasons including syncope (fainting), pre syncope (near fainting), palpitations and stroke. They monitor the heart and detect abnormalities.

Atrial fibrillation (irregular heart rhythm),is a common cardiac arrhythmia associated with a five-fold risk of stroke. Atrial Fibrillation increases the risk of stroke in patients to a different degree according to a risk stratification score. Anticoagulation is recommended to all high-risk patients.

Recent published studies have shown a high incidence of Atrial Fibrillation detected by ILRs in patients with previous stroke.

It is not known whether a similar incidence of Atrial Fibrillation occurs in patients without previous stroke. It is also not know ''how much'' Atrial Fibrillation is necessary to increase the risk of stroke, how relevant the finding of Atrial Fibrillation is and whether everybody with Atrial Fibrillation should have anticoagulation or whether a "bit of Atrial Fibrillation" is actually normal in most people.

The purpose of this study is to identify and compare the rate and the burden of Atrial Fibrillation (more or less than 30 seconds) in patients with and without previous stroke.

Medical notes and Implantable Loop Recorder records of the patients that had the devices implanted in Addendbrooke's Hospital from March 2009 up to 1 month after the implantation of the latest device will be inspected in order to identify whether the device had detected Atrial Fibrillation and if so the burden of Atrial Fibrillation in the two different groups of patients (with and without previous stroke).

The risk of stroke for each patient will be calculated. Echocardiographic (ultrasound scan of the heart)risk factors for Atrial Fibrillation will be identified and compared between the two groups.

This is going to be a retrospective study and we will be inspecting patients' data only..

Study Type

Observational

Enrollment (Actual)

500

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

All patients implanted with Implantable Loop Recorders from March 2009 up to 1 month (first follow up) of the latest ILR implantation.

Description

Inclusion Criteria:

  • Male or Female, aged 18 years or above.
  • Patients with Implantable Loop Recorder

Exclusion Criteria:

- None

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
patients with stroke
No intervention
patients without stroke
No intervention

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Incidence of Atrial Fibrillation in patients with and without previous stroke
Time Frame: 6 years
6 years

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Investigators

  • Principal Investigator: Peter Pugh, MBBS, MRCP, Cambridge University Hospitals NHS Foundation Trust

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

March 1, 2009

Primary Completion (Actual)

June 1, 2016

Study Completion (Actual)

June 1, 2016

Study Registration Dates

First Submitted

June 28, 2016

First Submitted That Met QC Criteria

July 21, 2016

First Posted (Estimate)

July 26, 2016

Study Record Updates

Last Update Posted (Estimate)

July 26, 2016

Last Update Submitted That Met QC Criteria

July 21, 2016

Last Verified

July 1, 2016

More Information

Terms related to this study

Other Study ID Numbers

  • 190674

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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