Plain English Summary
Background and study aims
Catheter ablation of persistent atrial fibrillation (a surgical procedure that destroys the defective area of the heart) has poor results after performing once. This is due to the occurrence of arrhythmia (irregular heartbeat) in more than one location. Success rate of the this approach becomes appreciable only after repeated procedures. Less invasive approaches, cover large portions of the heart (left atrium) and therefore have a higher success rate and thus reduce the need for repeated procedures. Additionally, recent studies have reported excellent results for step-by-step approach. In this study, we are checking if the step-by-step approach of performing a less invasive surgical treatment first, followed by a second surgical procedure, has a better success rate.
Who can participate?
Adult patients with persistent atrial fibrillation, that lasts for more than 7 days in the last 12 months, can participate in this study.
What does the study involve?
Patients are randomly allocated to one of two groups. One group (treatment group) receives catheter ablation as the first procedure. The other group receives the usual surgical approach as the first procedure. After three months, the patients are evaluated and they are subjected to the second surgical procedure if necessary.
What are the possible benefits and risks of participating?
The expected benefits for the patients in the treatment group is the reduction in the number of procedures required and more stable results. No occurrence of death is reported due to these surgical approaches. The risk of complications is not higher than the common procedures that have a small risk of damage to the gullet (impossible with surgery) and problems in the groin.
Where is the study run from?
The study is run from The Campus Biomedico University, Italy and the Catholic University of the Sacred Heart (the Università Cattolica Sacro Cuore), Italy. Other participants centres are being contacted to enlarge the volume of patients.
When is the study starting and how long is it expected to run for?
The study will start recruiting in September 2013 and is expected to complete by the end of 2015.
Who is funding the study?
It is funded by the participating centres: the Campus Bio-Medico University (Università Campus Bio-Medico), Italy, the Catholic University of the Sacred Heart (Università Cattolica del Sacro Cuore), Italy, and the Magna Graecia University of Catanzaro (Università degli studi Magna Graecia di Catanzaro), Italy.
Who is the main contact?
Dr Claudio Pragliola
cpragliola@rm.unicatt.it
Trial website
Additional identifiers
EudraCT number
ClinicalTrials.gov number
Protocol/serial number
AF1/2013
Study information
Scientific title
A controlled trial to determine whether the minimally invasive surgical ablation of persistent atrial fibrillation performed as the initial procedure is more effective than percutaneous catheter approach in achieving normal sinus rhythm after one year
Acronym
TOP-AF
Study hypothesis
We are verifying the hypothesis that a staged approach of performing a first minimally invasive surgical ablation of persistent atrial fibrillation followed, in case of recurrence, by a second percutaneous procedure, has a success rate higher than the repeated percutaneous procedures.
Ethics approval
The Campus Bio-Medico University (Università Campus Bio-Medico) Ethics Commission, approval 2013
Added 23/01/2014: The Magna Graecia University of Catanzaro (Università degli studi Magna Graecia di Catanzaro) Ethics Commission, approval 2013
Study design
Prospective controlled unbalanced (2:1) randomized trial
Primary study design
Interventional
Secondary study design
Randomised controlled trial
Trial setting
Hospitals
Trial type
Treatment
Patient information sheet
Not available on web format, please use the contact details below to request a patient information sheet
Condition
Persistent Atrial Fibrillation as defined by the 2012 Focused Updated of the ESC guidelines for the management of AF. Europ Heart J (2012)33:2719
Intervention
Patients will be randomized to the percutaneous catheter (100 patients) or to the Surgical (50 patients) ablation as first procedure. After 3 months they will be re-evaluated according to the same guidelines and will be subjected to a second procedure if necessary. Cross over will be allowed and data analyzed on an 'intention to treat' basis. Primary endpoints are the incidence of sinus rhythm at 6 and 12 months and the proportions of patients requiring a second procedure.
Intervention type
Other
Phase
Not Applicable
Drug names
Primary outcome measures
1. Freedom from AF at 12 months as detected by a 12 leads ECG and a 24 H Holter examination after a 3, 6 and 9 months follow-up
2. A repeated procedure to achieve a 12 months freedom from AF
Secondary outcome measures
Any documented atrial arrhythmia like atrial fibrillation (AF) or a trial flutter (AFL) or atrial tachycardia (AT)
Overall trial start date
01/09/2013
Overall trial end date
31/12/2015
Reason abandoned
Eligibility
Participant inclusion criteria
The inclusion and exclusion criteria, definitions and treatment protocols are those reported by the 2012 HRS/EHRA/ECAS expert consensus statement on cathter and surgical ablation of atrial fibrillation. J Interv Card Elecrophysiol (2012);33:171
Inclusion criteria
1. Patients who are 18 years of age or older
2. Patients with persistent AF, which is defined as a sustained episode lasting more than 7 days in the last 12 months
3. Patients with symptomatic AF that is refractory to at least one antiarrhythmic medication. Symptomatic patients are those who have been aware of their AF at anytime within the last 5 years before 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.
4. At least one episode of persistent AF must have been documented by ECG, Holter, loop recorder, telemetry, transtelephonic monitor, or implantable device within last 2 years of enrollment in this investigation.
5. Patients must be able and willing to provide written informed consent to participate in this investigation
6. Patients must be willing and able to comply with all periablation and follow-up requirements
Participant type
Patient
Age group
Adult
Gender
Both
Target number of participants
150
Participant exclusion criteria
1. Patients with paroxysmal AF, whic is defined as a sustained episode lasting >7 days
2. Patients with long-standing persistent AF, which is defined as a sustained episode lasting >1 year
3. Patients for whom cardioversion or sinus rhythm will never be attempted/pursued
4. Patients with AF secondary to a reversible cause
5. Patients with contraindications to systemic anticoagulation
6. Patients with left atrial size ≥55 mm (2-dimensional echocardiography, parasternal long-axis view)
7. Patients with LA thrombi as demonstrated by TEE
Recruitment start date
01/09/2013
Recruitment end date
31/12/2015
Locations
Countries of recruitment
Italy
Trial participating centre
via della balduina 120
ROMA
00136
Italy
Sponsor information
Funders
Funder type
University/education
Funder name
The Campus Bio-Medico University (Università Campus Bio-Medico) (Italy)
Alternative name(s)
Funding Body Type
Funding Body Subtype
Location
Funder name
The Catholic University of the Sacred Heart (Università Cattolica del Sacro Cuore) (Italy)
Alternative name(s)
Funding Body Type
Funding Body Subtype
Location
Funder name
Added 23/01/2014:
Alternative name(s)
Funding Body Type
Funding Body Subtype
Location
Funder name
The Magna Graecia University of Catanzaro (Università degli studi Magna Graecia di Catanzaro) (Italy)
Alternative name(s)
Funding Body Type
Funding Body Subtype
Location
Results and Publications
Publication and dissemination plan
Not provided at time of registration
Intention to publish date
Participant level data
Not provided at time of registration
Results - basic reporting
Publication summary
2014 protocol in: http://www.ncbi.nlm.nih.gov/pubmed/24885377
Publication citations
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Protocol
Pragliola C, Mastroroberto P, Gaudino M, Chello M, Covino E, Staged transthoracic approach to persistent atrial fibrillation (TOP-AF): study protocol for a randomized trial., Trials, 2014, 15, 190, doi: 10.1186/1745-6215-15-190.