Atrial FibrillationPhase 4DAPPARAFNCT01468155
DAPPAR AF Dabigatran for Peri Procedural Anticoagulation During Radiofrequency Ablation of Atrial Fibrillation
A Phase 4 study testing dabigatran in people with Atrial Fibrillation, run by London Health Sciences Centre Research Institute OR Lawson Research Institute of St. Joseph's at 1 site in Canada.
Trial summary
It is hypothesized that peri-ablation Dabigatran will be a safe and effective method of peri-procedural anticoagulation for Atrial Fibrillation (AF) ablation, resulting in a low rate of peri-procedural bleeding and thromboembolic complications. Read more about this study
- Who is it for?
- Ages 18 years and olderHealthy volunteers can take part
- Conditions the study is for
- Atrial Fibrillation
- What is being tested?
- dabigatran
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 50 participants
- Where
- 1 siteCanada
- Study dates
- 13 Jul 2011to 7 Jun 2017
- Phase
- Phase 4
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- Patients age 18 or greater.
- Patients undergoing first-time catheter ablation for AF.
- Patients with paroxysmal or persistent AF. Paroxysmal AF will be defined as self-terminating episodes less than 7 days duration. Persistent AF will be defined as episodes that last longer than 7 days duration or episodes requiring termination by electrical or chemical cardioversion.
- Patients with symptomatic AF that is refractory to at least one antiarrhythmic medication. "Symptomatic" patients are those who have been aware of their AF anytime within the last 5 years prior to enrollment. Symptoms may include, but are not restricted to, palpitations, shortness of breath, chest pain, fatigue, left ventricular dysfunction, or other symptoms, or any combination of the above.
- At least one episode of AF must have been documented by ECG, Holter, loop recorder, telemetry, or transtelephonic monitoring within 24 months of entry in the trial.
- Patients must be able and willing to provide written informed consent to participate in the clinical trial.
Who cannot join
- Patients with AF felt to be secondary to an obvious reversible cause (e.g. thyroid disease, post-surgical).
- Patients with contraindications to systemic anticoagulation with heparin or a direct thrombin inhibitor.
- Patients with severe renal impairment (creatinine clearance of <30 ml/min)
- Patients with left atrial size >/= 60 mm (2D echocardiography, parasternal long axis view).
- Patients who are or may potentially be pregnant or who are not on an effective method of birth control or who are planning to get pregnant during the study.
- Patients with mechanical heart valves.
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- Patients who are undergoing repeat catheter ablation of AF.
- Patients with hemorrhagic manifestations, bleeding diathesis, or patients with impairment of hemostasis.
- Lesions at risk of clinically significant bleeding - such as extensive cerebral infarction within the last 6 months, active peptic ulcer disease with recent bleeding.
- Concomitant treatment with strong P-glycoprotein inhibitors, i.e. ketoconazole.
- Known hypersensitivity to Dabigatran or Dabigatran etexilate.
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Dabigatran for Peri Procedural Anticoagulation During Radiofrequency Ablation of Atrial Fibrillation
It is hypothesized that peri-ablation Dabigatran will be a safe and effective method of peri-procedural anticoagulation for Atrial Fibrillation (AF) ablation, resulting in a low rate of peri-procedural bleeding and thromboembolic complications.
Read the detailed description
All patients will be initiated on fixed dose Dabigatran 150 mg BID at least one month prior to the ablation procedure. If patients were already on warfarin therapy, then warfarin should be stopped for a minimum of 2 days prior to Dabigatran initiation, when the INR is less than 2. Patients will remain on the same dose of Dabigatran until the day before ablation. On the day prior to ablation, patients will not take any Dabigatran, nor will any be taken on the day of ablation, until after sheath removal.
For patients in high-risk groups for bleeding, the lower dose of Dabigatran may be used, or the drug may be stopped further in advance of the procedure. For patients with age greater than 80 years old, the lower dose of Dabigatran (110 mg BID) may be used as an alternative. For patients with impaired renal function, the lower dose may be used, but the drug may be stopped earlier in advance of the procedure as per the suggestions in Appendix A.
Post-ablation, Dabigatran will be started at the same dose - either 150 mg or 110 mg - as before the ablation procedure. Dabigatran will be initiated 8 hours post sheath removal and continue twice daily until the three month follow-up.
- Conditions
- Atrial Fibrillation
- Being tested
- dabigatran
- Keywords
- PVA, peri procedural bleeding complications
- Medical subject headings
- Atrial Fibrillation
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
dabigatranDrug
Also called pradax
30 days pre ablation and 90 days post ablation
| Study group | Role | What they receive |
|---|---|---|
| Dabigatran | Active comparator | Dabigatran will be compared to historical data using other OAC methods for Pulmonary Vein Ablation Receives: Drug: dabigatran |
What is being measured
The primary outcome is the main question the study is designed to answer.
The incidence of peri-procedural major bleeding complications
Measured: 1 month prior to Pulmonary Vein Ablation and three months post ablation.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted9 Nov 2011 (estimated)
- Study start13 Jul 2011
- Primary completionJan 2017
- Study completion7 Jun 2017
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Atrial FibrillationStudies of the same condition, open and under way.
- More trials run by London Health Sciences Centre Research Institute OR Lawson Research Institute of St. Joseph'sThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 4
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 50 participants (actual)
Sponsor and investigators
- Lead sponsor
- London Health Sciences Centre Research Institute OR Lawson Research Institute of St. Joseph's
- Sponsor type
- University, hospital or other
- Collaborators
- Boehringer Ingelheim
- Responsible party
- Sponsor
- Investigators
- Allan Skanes, MD, FRCPC, Principal investigator, London Health Sciences Centre Research Institute OR Lawson Research Institute of St. Joseph's
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01468155
- Sponsor's protocol ID
- HSREB 18098
- Acronym
- DAPPARAF
- Status last verified
- Nov 2017
- First submitted
- 7 Nov 2011
- Last updated
- 6 Nov 2017
- Results posted
- No
- Data monitoring committee
- Yes
Study at a glance
From the registry record, last updated by the sponsor on 6 Nov 2017. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Dabigatran for Peri Procedural Anticoagulation During Radiofrequency Ablation of Atrial Fibrillation
- ClinicalTrials.gov ID
- NCT01468155
- Acronym / sponsor ID
- DAPPARAF / HSREB 18098
- Conditions
- Atrial Fibrillation
- Keywords
- PVA, peri procedural bleeding complications
- Phase
- Phase 4
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 50 participants (actual)
- Lead sponsor
- London Health Sciences Centre Research Institute OR Lawson Research Institute of St. Joseph'sUniversity, hospital or other
- Collaborators
- Boehringer Ingelheim
- Study start
- 13 Jul 2011 (actual)
- Primary completion
- Jan 2017 (actual)
- Study completion
- 7 Jun 2017 (actual)
- First posted
- 9 Nov 2011 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
It is hypothesized that peri-ablation Dabigatran will be a safe and effective method of peri-procedural anticoagulation for Atrial Fibrillation (AF) ablation, resulting in a low rate of peri-procedural bleeding and thromboembolic complications.
Detailed description
All patients will be initiated on fixed dose Dabigatran 150 mg BID at least one month prior to the ablation procedure. If patients were already on warfarin therapy, then warfarin should be stopped for a minimum of 2 days prior to Dabigatran initiation, when the INR is less than 2. Patients will remain on the same dose of Dabigatran until the day before ablation. On the day prior to ablation, patients will not take any Dabigatran, nor will any be taken on the day of ablation, until after sheath removal.
For patients in high-risk groups for bleeding, the lower dose of Dabigatran may be used, or the drug may be stopped further in advance of the procedure. For patients with age greater than 80 years old, the lower dose of Dabigatran (110 mg BID) may be used as an alternative. For patients with impaired renal function, the lower dose may be used, but the drug may be stopped earlier in advance of the procedure as per the suggestions in Appendix A.
Post-ablation, Dabigatran will be started at the same dose - either 150 mg or 110 mg - as before the ablation procedure. Dabigatran will be initiated 8 hours post sheath removal and continue twice daily until the three month follow-up.
Study design
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Dabigatran | Active comparator | Drug: dabigatranDabigatran will be compared to historical data using other OAC methods for Pulmonary Vein Ablation |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (6 listed)
- Patients age 18 or greater.
- Patients undergoing first-time catheter ablation for AF.
- Patients with paroxysmal or persistent AF. Paroxysmal AF will be defined as self-terminating episodes less than 7 days duration. Persistent AF will be defined as episodes that last longer than 7 days duration or episodes requiring termination by electrical or chemical cardioversion.
- Patients with symptomatic AF that is refractory to at least one antiarrhythmic medication. "Symptomatic" patients are those who have been aware of their AF anytime within the last 5 years prior to enrollment. Symptoms may include, but are not restricted to, palpitations, shortness of breath, chest pain, fatigue, left ventricular dysfunction, or other symptoms, or any combination of the above.
- At least one episode of AF must have been documented by ECG, Holter, loop recorder, telemetry, or transtelephonic monitoring within 24 months of entry in the trial.
Key exclusion criteria (11 listed)
- Patients with AF felt to be secondary to an obvious reversible cause (e.g. thyroid disease, post-surgical).
- Patients with contraindications to systemic anticoagulation with heparin or a direct thrombin inhibitor.
- Patients with severe renal impairment (creatinine clearance of <30 ml/min)
- Patients with left atrial size >/= 60 mm (2D echocardiography, parasternal long axis view).
- Patients who are or may potentially be pregnant or who are not on an effective method of birth control or who are planning to get pregnant during the study.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| dabigatranAlso: pradax30 days pre ablation and 90 days post ablation | Drug | Dabigatran |
Primary outcome
The incidence of peri-procedural major bleeding complications
Time frame: 1 month prior to Pulmonary Vein Ablation and three months post ablation.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 6 Nov 2017.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Allan Skanes, MD, FRCPC principal investigator
London Health Sciences Centre Research Institute OR Lawson Research Institute of St. Joseph's
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 4 study testing dabigatran in people with Atrial Fibrillation, run by London Health Sciences Centre Research Institute OR Lawson Research Institute of St. Joseph's at 1 site in Canada.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 6 inclusion and 11 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 6 Nov 2017. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Canada. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 4 studies take place after a treatment is approved, to learn more about its long-term benefits and risks in everyday use.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
The incidence of peri-procedural major bleeding complications (time frame: 1 month prior to Pulmonary Vein Ablation and three months post ablation.). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 6 Nov 2017; AzTrials last refreshed its copy on 6 Nov 2026.