Atrial FibrillationNCT02477592
a Novel Individualized Substrate Modification Approach for the Treatment of Long-standing Persistent Atrial Fibrillation
A study testing individualized substrate modification and stepwise ablation in people with Atrial Fibrillation, run by RenJi Hospital at 1 site in China.
Trial summary
The purpose of this study is to compare effectiveness of two substrate modification approaches in long-standing persistent atrial fibrillation patients, and hypothesized that a substrate-based, individualized substrate modification (ISM)approach should be superior to traditional stepwise ablation(SA). Read more about this study
- Who is it for?
- Ages 18 to 72 years
- Conditions the study is for
- Atrial Fibrillation
- What is being tested?
- individualized substrate modification and stepwise ablation
- Type of treatment
- Surgery or procedure
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 220 participants
- Where
- 1 siteChina
- Study dates
- Jan 2015to May 2017
- Phase
- Interventional
- 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 to 72 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Age ≥ 18 and ≤ 72years
- History of LPAF for ≥1 and ≤ 5 years
- Written informed consent provided
- Acceptance of catheter ablation treatment
- Acceptance of post-ablation follow-up
Who cannot join
- Prior history of catheter ablation or surgical ablation
- Abnormal coagulation; contraindication for anti-coagulation
- left atrium diameter ≥ 55mm
- left atrium thrombus
Trial locations and contacts
1 site in 1 country.
China1 site, 1 recruiting
- Recruiting
Shanghai Jiaotong University school of medicine,Renji Hospital
Shanghai, Shanghai Municipality, 200127
Xinhua Wang, MD,PHD, 862168385206, ttwwxh@126.com
About this study
Official title: A Prospective Randomized Study of a Novel Individualized Substrate Modification Approach Versus Stepwise Ablation for the Treatment of Long-standing Persistent Atrial Fibrillation
The purpose of this study is to compare effectiveness of two substrate modification approaches in long-standing persistent atrial fibrillation patients, and hypothesized that a substrate-based, individualized substrate modification (ISM)approach should be superior to traditional stepwise ablation(SA). To the best of investigator's knowledge, this was the first study to evaluate the "real" substrate by means of electro-anatomic mapping and to perform "true" substrate modification in long standing persistent atrial fibrillation ablation(LPAF).
Read the detailed description
Catheter ablation (CA) is highly effective for paroxysmal atrial fibrillation(AF), it is modestly effective for long standing persistent atrial fibrillation ablation(LPAF) even with complex or combined approaches, which is mainly attributed to the substrate underlying AF remodeling. Severity of atrial fibrosis is closely associated with clinical outcomes after CA for AF . The more atrial scars and fibrosis present, the lower the success rate for AF ablation. Patients with LPAF have many more areas with scars and fibrosis than those with paroxysmal AF or non-AF controls. The MRI delayed enhancement technique provides a non-interventional tool for evaluation of atrial fibrosis, however, it must be performed in sinus rhythm.Three-dimensional electro anatomic mapping has proven as accurate as MRI and can be performed easily during AF ablation, thus providing a good tool for evaluation of atrial substrate during LPAF ablation.
Although electro-anatomic mapping provided a desirable surrogate for delayed enhancement MRI to define AF substrate, there was an important technical issue to be considered. There were no good techniques to predict a desirable tip-tissue contact before the contact force catheter was applied. A poor tip-tissue contact could render the results of voltage mapping less reliable. On the other hand, excessively high contact force could increase the risk of steam pop and cardiac perforation during ablation. Hence it was important to use the contact force catheter to perform substrate mapping and ablation.
- Conditions
- Atrial Fibrillation
- Being tested
- individualized substrate modification, stepwise ablation
- Keywords
- long standing persistent atrial fibrillation, novel approach, ablation
- Medical subject headings
- Atrial Fibrillation
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
individualized substrate modificationProcedure or surgery
CPVI ablation and left atrial roof linear ablation first,then substrate mapping in sinus rhythm followed by individualized substrate modification.
stepwise ablationProcedure or surgery
CPVI ablation,left atrial roof linear ablation,mitral isthmus linear ablation,complex fractionated atrial electrograms ablation step by step.
| Study group | Role | What they receive |
|---|---|---|
| Individualized substrate modification | Experimental | Circumferential pulmonary vein isolation(CPVI) ablation and left atrial roof linear ablation first,then substrate mapping in sinus rhythm followed by Individualized substrate modification. Receives: Procedure: individualized substrate modification |
| Stepwise ablation | Active comparator | CPVI ablation,left atrial roof linear ablation,mitral isthmus linear ablation,complex fractionated atrial electrograms ablation step by step. Receives: Procedure: stepwise ablation |
What is being measured
The primary outcome is the main question the study is designed to answer.
atrial fibrillation free rate on or off antiarrhythmic drugs (AADs) after initial ablation
Measured: 1 year
Secondary outcomes (6)
Number of participants with adverse event
pericardial tamponade and thromboembolism event
Measured: 1 year
Prevalence of recurrent atrial flutter
Measured: 1 year
Proportion of pulmonary vein isolation
Measured: 1 year
Proportion of acute pulmonary vein re-connection
Measured: 1 year
Fluoroscopy exposure time
Measured: 1 year
Total ablation time
Measured: 1 year
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted23 Jun 2015 (estimated)
- Study startJan 2015
- Primary completionMay 2016 (estimated)
- Study completionMay 2017 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (12)Papers the sponsor has linked to this study.
- Other trials for Atrial FibrillationStudies of the same condition, open and under way.
- More trials run by RenJi HospitalThe 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 N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind
- Who is masked
- Participant
- Enrolment
- 220 participants (estimated)
Sponsor and investigators
- Lead sponsor
- RenJi Hospital
- Sponsor type
- University, hospital or other
- Collaborators
- Biosense Webster, Inc.
- Responsible party
- Sponsor
- Investigators
- Xinhua Wang, MD,PHD, Principal investigator, Shanghai Jiao Tong University School of Medicine
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT02477592
- Sponsor's protocol ID
- 仁济伦审[2014]116K
- Status last verified
- Jan 2015
- First submitted
- 8 Jun 2015
- Last updated
- 23 Jun 2015
- Results posted
- No
- Data monitoring committee
- Yes
Publications
Calkins H, Kuck KH, Cappato R, Brugada J, Camm AJ, Chen SA, Crijns HJ, Damiano RJ Jr, Davies DW, DiMarco J, Edgerton J, Ellenbogen K, Ezekowitz MD, Haines DE, Haissaguerre M, Hindricks G, Iesaka Y, Jackman W, Jalife J, Jais P, Kalman J, Keane D, Kim YH, Kirchhof P, Klein G, Kottkamp H, Kumagai K, Lindsay BD, Mansour M, Marchlinski FE, McCarthy PM, Mont JL, Morady F, Nademanee K, Nakagawa H, Natale A, Nattel S, Packer DL, Pappone C, Prystowsky E, Raviele A, Reddy V, Ruskin JN, Shemin RJ, Tsao HM, Wilber D; Heart Rhythm Society Task Force on Catheter and Surgical Ablation of Atrial Fibrillation. 2012 HRS/EHRA/ECAS expert consensus statement on catheter and surgical ablation of atrial fibrillation: recommendations for patient selection, procedural techniques, patient management and follow-up, definitions, endpoints, and research trial design: a report of the Heart Rhythm Society (HRS) Task Force on Catheter and Surgical Ablation of Atrial Fibrillation. Developed in partnership with the European Heart Rhythm Association (EHRA), a registered branch of the European Society of Cardiology (ESC) and the European Cardiac Arrhythmia Society (ECAS); and in collaboration with the American College of Cardiology (ACC), American Heart Association (AHA), the Asia Pacific Heart Rhythm Society (APHRS), and the Society of Thoracic Surgeons (STS). Endorsed by the governing bodies of the American College of Cardiology Foundation, the American Heart Association, the European Cardiac Arrhythmia Society, the European Heart Rhythm Association, the Society of Thoracic Surgeons, the Asia Pacific Heart Rhythm Society, and the Heart Rhythm Society. Heart Rhythm. 2012 Apr;9(4):632-696.e21. doi: 10.1016/j.hrthm.2011.12.016. Epub 2012 Mar 1. No abstract available.
PubMed 22386883Camm AJ, Lip GY, De Caterina R, Savelieva I, Atar D, Hohnloser SH, Hindricks G, Kirchhof P; ESC Committee for Practice Guidelines (CPG). 2012 focused update of the ESC Guidelines for the management of atrial fibrillation: an update of the 2010 ESC Guidelines for the management of atrial fibrillation. Developed with the special contribution of the European Heart Rhythm Association. Eur Heart J. 2012 Nov;33(21):2719-47. doi: 10.1093/eurheartj/ehs253. Epub 2012 Aug 24. No abstract available.
PubMed 22922413Chao TF, Tsao HM, Lin YJ, Tsai CF, Lin WS, Chang SL, Lo LW, Hu YF, Tuan TC, Suenari K, Li CH, Hartono B, Chang HY, Ambrose K, Wu TJ, Chen SA. Clinical outcome of catheter ablation in patients with nonparoxysmal atrial fibrillation: results of 3-year follow-up. Circ Arrhythm Electrophysiol. 2012 Jun 1;5(3):514-20. doi: 10.1161/CIRCEP.111.968032. Epub 2012 May 1.
PubMed 22550126Brooks AG, Stiles MK, Laborderie J, Lau DH, Kuklik P, Shipp NJ, Hsu LF, Sanders P. Outcomes of long-standing persistent atrial fibrillation ablation: a systematic review. Heart Rhythm. 2010 Jun;7(6):835-46. doi: 10.1016/j.hrthm.2010.01.017. Epub 2010 Jan 22.
PubMed 20206320Sawhney N, Anousheh R, Chen W, Feld GK. Circumferential pulmonary vein ablation with additional linear ablation results in an increased incidence of left atrial flutter compared with segmental pulmonary vein isolation as an initial approach to ablation of paroxysmal atrial fibrillation. Circ Arrhythm Electrophysiol. 2010 Jun;3(3):243-8. doi: 10.1161/CIRCEP.109.924878. Epub 2010 Mar 25.
PubMed 20339034Sawhney N, Anand K, Robertson CE, Wurdeman T, Anousheh R, Feld GK. Recovery of mitral isthmus conduction leads to the development of macro-reentrant tachycardia after left atrial linear ablation for atrial fibrillation. Circ Arrhythm Electrophysiol. 2011 Dec;4(6):832-7. doi: 10.1161/CIRCEP.111.964817. Epub 2011 Sep 30.
PubMed 21965530Chen M, Yang B, Chen H, Ju W, Zhang F, Tse HF, Cao K. Randomized comparison between pulmonary vein antral isolation versus complex fractionated electrogram ablation for paroxysmal atrial fibrillation. J Cardiovasc Electrophysiol. 2011 Sep;22(9):973-81. doi: 10.1111/j.1540-8167.2011.02051.x. Epub 2011 May 3.
PubMed 21539635Verma A, Wazni OM, Marrouche NF, Martin DO, Kilicaslan F, Minor S, Schweikert RA, Saliba W, Cummings J, Burkhardt JD, Bhargava M, Belden WA, Abdul-Karim A, Natale A. Pre-existent left atrial scarring in patients undergoing pulmonary vein antrum isolation: an independent predictor of procedural failure. J Am Coll Cardiol. 2005 Jan 18;45(2):285-92. doi: 10.1016/j.jacc.2004.10.035.
PubMed 15653029Mahnkopf C, Badger TJ, Burgon NS, Daccarett M, Haslam TS, Badger CT, McGann CJ, Akoum N, Kholmovski E, Macleod RS, Marrouche NF. Evaluation of the left atrial substrate in patients with lone atrial fibrillation using delayed-enhanced MRI: implications for disease progression and response to catheter ablation. Heart Rhythm. 2010 Oct;7(10):1475-81. doi: 10.1016/j.hrthm.2010.06.030. Epub 2010 Jul 1.
PubMed 20601148Teh AW, Kistler PM, Lee G, Medi C, Heck PM, Spence SJ, Sparks PB, Morton JB, Kalman JM. Electroanatomic remodeling of the left atrium in paroxysmal and persistent atrial fibrillation patients without structural heart disease. J Cardiovasc Electrophysiol. 2012 Mar;23(3):232-8. doi: 10.1111/j.1540-8167.2011.02178.x. Epub 2011 Sep 28.
PubMed 21955090Oakes RS, Badger TJ, Kholmovski EG, Akoum N, Burgon NS, Fish EN, Blauer JJ, Rao SN, DiBella EV, Segerson NM, Daccarett M, Windfelder J, McGann CJ, Parker D, MacLeod RS, Marrouche NF. Detection and quantification of left atrial structural remodeling with delayed-enhancement magnetic resonance imaging in patients with atrial fibrillation. Circulation. 2009 Apr 7;119(13):1758-67. doi: 10.1161/CIRCULATIONAHA.108.811877. Epub 2009 Mar 23.
PubMed 19307477Park JH, Pak HN, Choi EJ, Jang JK, Kim SK, Choi DH, Choi JI, Hwang C, Kim YH. The relationship between endocardial voltage and regional volume in electroanatomical remodeled left atria in patients with atrial fibrillation: comparison of three-dimensional computed tomographic images and voltage mapping. J Cardiovasc Electrophysiol. 2009 Dec;20(12):1349-56. doi: 10.1111/j.1540-8167.2009.01557.x.
PubMed 19602027
Study at a glance
From the registry record, last updated by the sponsor on 23 Jun 2015. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Prospective Randomized Study of a Novel Individualized Substrate Modification Approach Versus Stepwise Ablation for the Treatment of Long-standing Persistent Atrial Fibrillation
- ClinicalTrials.gov ID
- NCT02477592
- Acronym / sponsor ID
- 仁济伦审[2014]116K
- Conditions
- Atrial Fibrillation
- Keywords
- long standing persistent atrial fibrillation, novel approach, ablation
- Study type
- Interventional
- Recruitment status
- Unknown status
- Enrolment
- 220 participants (estimated)
- Lead sponsor
- RenJi HospitalUniversity, hospital or other
- Collaborators
- Biosense Webster, Inc.
- Study start
- Jan 2015
- Primary completion
- May 2016 (estimated)
- Study completion
- May 2017 (estimated)
- First posted
- 23 Jun 2015 (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.
The purpose of this study is to compare effectiveness of two substrate modification approaches in long-standing persistent atrial fibrillation patients, and hypothesized that a substrate-based, individualized substrate modification (ISM)approach should be superior to traditional stepwise ablation(SA). To the best of investigator's knowledge, this was the first study to evaluate the "real" substrate by means of electro-anatomic mapping and to perform "true" substrate modification in long standing persistent atrial fibrillation ablation(LPAF).
Detailed description
Catheter ablation (CA) is highly effective for paroxysmal atrial fibrillation(AF), it is modestly effective for long standing persistent atrial fibrillation ablation(LPAF) even with complex or combined approaches, which is mainly attributed to the substrate underlying AF remodeling. Severity of atrial fibrosis is closely associated with clinical outcomes after CA for AF . The more atrial scars and fibrosis present, the lower the success rate for AF ablation. Patients with LPAF have many more areas with scars and fibrosis than those with paroxysmal AF or non-AF controls. The MRI delayed enhancement technique provides a non-interventional tool for evaluation of atrial fibrosis, however, it must be performed in sinus rhythm.Three-dimensional electro anatomic mapping has proven as accurate as MRI and can be performed easily during AF ablation, thus providing a good tool for evaluation of atrial substrate during LPAF ablation.
Although electro-anatomic mapping provided a desirable surrogate for delayed enhancement MRI to define AF substrate, there was an important technical issue to be considered. There were no good techniques to predict a desirable tip-tissue contact before the contact force catheter was applied. A poor tip-tissue contact could render the results of voltage mapping less reliable. On the other hand, excessively high contact force could increase the risk of steam pop and cardiac perforation during ablation. Hence it was important to use the contact force catheter to perform substrate mapping and ablation.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind (participant)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Individualized substrate modification | Experimental | Procedure: individualized substrate modificationCircumferential pulmonary vein isolation(CPVI) ablation and left atrial roof linear ablation first,then substrate mapping in sinus rhythm followed by Individualized substrate modification. |
| Stepwise ablation | Active comparator | Procedure: stepwise ablationCPVI ablation,left atrial roof linear ablation,mitral isthmus linear ablation,complex fractionated atrial electrograms ablation step by step. |
Who may qualify
- Ages
- 18 to 72 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (5 listed)
- Age ≥ 18 and ≤ 72years
- History of LPAF for ≥1 and ≤ 5 years
- Written informed consent provided
- Acceptance of catheter ablation treatment
- Acceptance of post-ablation follow-up
Key exclusion criteria (4 listed)
- Prior history of catheter ablation or surgical ablation
- Abnormal coagulation; contraindication for anti-coagulation
- left atrium diameter ≥ 55mm
- left atrium thrombus
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 |
|---|---|---|
| individualized substrate modificationCPVI ablation and left atrial roof linear ablation first,then substrate mapping in sinus rhythm followed by individualized substrate modification. | Procedure or surgery | Individualized substrate modification |
| stepwise ablationCPVI ablation,left atrial roof linear ablation,mitral isthmus linear ablation,complex fractionated atrial electrograms ablation step by step. | Procedure or surgery | Stepwise ablation |
Primary outcome
atrial fibrillation free rate on or off antiarrhythmic drugs (AADs) after initial ablation
Time frame: 1 year
6 secondary outcomes
Number of participants with adverse event
Time frame: 1 year
Prevalence of recurrent atrial flutter
Time frame: 1 year
Proportion of pulmonary vein isolation
Time frame: 1 year
Proportion of acute pulmonary vein re-connection
Time frame: 1 year
Fluoroscopy exposure time
Time frame: 1 year
Total ablation time
Time frame: 1 year
Results and safety
Results are not available in the source record.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 23 Jun 2015.
- Results publication: PubMed 22386883Calkins H, Kuck KH, Cappato R, Brugada J, Camm AJ, Chen SA, Crijns HJ, Damiano RJ Jr, Davies DW, DiMarco J, Edgerton J, Ellenbogen K, Ezekowitz MD, Haines DE, Haissaguerre M, Hindricks G, Iesaka Y, Jackman W, Jalife J, Jais P, Kalman J, Keane D, Kim YH, Kirchhof P, Klein G, Kottkamp H, Kumagai K, Lindsay BD, Mansour M, Marchlinski FE, McCarthy PM, Mont JL, Morady F, Nademanee K, Nakagawa H, Natale A, Nattel S, Packer DL, Pappone C, Prystowsky E, Raviele A, Reddy V, Ruskin JN, Shemin RJ, Tsao HM, Wilber D; Heart Rhythm Society Task Force on Catheter and Surgical Ablation of Atrial Fibrillation. 2012 HRS/EHRA/ECAS expert consensus statement on catheter and surgical ablation of atrial fibrillation: recommendations for patient selection, procedural techniques, patient management and follow-up, definitions, endpoints, and research trial design: a report of the Heart Rhythm Society (HRS) Task Force on Catheter and Surgical Ablation of Atrial Fibrillation. Developed in partnership with the European Heart Rhythm Association (EHRA), a registered branch of the European Society of Cardiology (ESC) and the European Cardiac Arrhythmia Society (ECAS); and in collaboration with the American College of Cardiology (ACC), American Heart Association (AHA), the Asia Pacific Heart Rhythm Society (APHRS), and the Society of Thoracic Surgeons (STS). Endorsed by the governing bodies of the American College of Cardiology Foundation, the American Heart Association, the European Cardiac Arrhythmia Society, the European Heart Rhythm Association, the Society of Thoracic Surgeons, the Asia Pacific Heart Rhythm Society, and the Heart Rhythm Society. Heart Rhythm. 2012 Apr;9(4):632-696.e21. doi: 10.1016/j.hrthm.2011.12.016. Epub 2012 Mar 1. No abstract available.
- Results publication: PubMed 22922413Camm AJ, Lip GY, De Caterina R, Savelieva I, Atar D, Hohnloser SH, Hindricks G, Kirchhof P; ESC Committee for Practice Guidelines (CPG). 2012 focused update of the ESC Guidelines for the management of atrial fibrillation: an update of the 2010 ESC Guidelines for the management of atrial fibrillation. Developed with the special contribution of the European Heart Rhythm Association. Eur Heart J. 2012 Nov;33(21):2719-47. doi: 10.1093/eurheartj/ehs253. Epub 2012 Aug 24. No abstract available.
- Results publication: PubMed 22550126Chao TF, Tsao HM, Lin YJ, Tsai CF, Lin WS, Chang SL, Lo LW, Hu YF, Tuan TC, Suenari K, Li CH, Hartono B, Chang HY, Ambrose K, Wu TJ, Chen SA. Clinical outcome of catheter ablation in patients with nonparoxysmal atrial fibrillation: results of 3-year follow-up. Circ Arrhythm Electrophysiol. 2012 Jun 1;5(3):514-20. doi: 10.1161/CIRCEP.111.968032. Epub 2012 May 1.
- Results publication: PubMed 20206320Brooks AG, Stiles MK, Laborderie J, Lau DH, Kuklik P, Shipp NJ, Hsu LF, Sanders P. Outcomes of long-standing persistent atrial fibrillation ablation: a systematic review. Heart Rhythm. 2010 Jun;7(6):835-46. doi: 10.1016/j.hrthm.2010.01.017. Epub 2010 Jan 22.
- Results publication: PubMed 20339034Sawhney N, Anousheh R, Chen W, Feld GK. Circumferential pulmonary vein ablation with additional linear ablation results in an increased incidence of left atrial flutter compared with segmental pulmonary vein isolation as an initial approach to ablation of paroxysmal atrial fibrillation. Circ Arrhythm Electrophysiol. 2010 Jun;3(3):243-8. doi: 10.1161/CIRCEP.109.924878. Epub 2010 Mar 25.
- Results publication: PubMed 21965530Sawhney N, Anand K, Robertson CE, Wurdeman T, Anousheh R, Feld GK. Recovery of mitral isthmus conduction leads to the development of macro-reentrant tachycardia after left atrial linear ablation for atrial fibrillation. Circ Arrhythm Electrophysiol. 2011 Dec;4(6):832-7. doi: 10.1161/CIRCEP.111.964817. Epub 2011 Sep 30.
- Results publication: PubMed 21539635Chen M, Yang B, Chen H, Ju W, Zhang F, Tse HF, Cao K. Randomized comparison between pulmonary vein antral isolation versus complex fractionated electrogram ablation for paroxysmal atrial fibrillation. J Cardiovasc Electrophysiol. 2011 Sep;22(9):973-81. doi: 10.1111/j.1540-8167.2011.02051.x. Epub 2011 May 3.
- Results publication: PubMed 15653029Verma A, Wazni OM, Marrouche NF, Martin DO, Kilicaslan F, Minor S, Schweikert RA, Saliba W, Cummings J, Burkhardt JD, Bhargava M, Belden WA, Abdul-Karim A, Natale A. Pre-existent left atrial scarring in patients undergoing pulmonary vein antrum isolation: an independent predictor of procedural failure. J Am Coll Cardiol. 2005 Jan 18;45(2):285-92. doi: 10.1016/j.jacc.2004.10.035.
- Results publication: PubMed 20601148Mahnkopf C, Badger TJ, Burgon NS, Daccarett M, Haslam TS, Badger CT, McGann CJ, Akoum N, Kholmovski E, Macleod RS, Marrouche NF. Evaluation of the left atrial substrate in patients with lone atrial fibrillation using delayed-enhanced MRI: implications for disease progression and response to catheter ablation. Heart Rhythm. 2010 Oct;7(10):1475-81. doi: 10.1016/j.hrthm.2010.06.030. Epub 2010 Jul 1.
- Results publication: PubMed 21955090Teh AW, Kistler PM, Lee G, Medi C, Heck PM, Spence SJ, Sparks PB, Morton JB, Kalman JM. Electroanatomic remodeling of the left atrium in paroxysmal and persistent atrial fibrillation patients without structural heart disease. J Cardiovasc Electrophysiol. 2012 Mar;23(3):232-8. doi: 10.1111/j.1540-8167.2011.02178.x. Epub 2011 Sep 28.
- Results publication: PubMed 19307477Oakes RS, Badger TJ, Kholmovski EG, Akoum N, Burgon NS, Fish EN, Blauer JJ, Rao SN, DiBella EV, Segerson NM, Daccarett M, Windfelder J, McGann CJ, Parker D, MacLeod RS, Marrouche NF. Detection and quantification of left atrial structural remodeling with delayed-enhancement magnetic resonance imaging in patients with atrial fibrillation. Circulation. 2009 Apr 7;119(13):1758-67. doi: 10.1161/CIRCULATIONAHA.108.811877. Epub 2009 Mar 23.
- Results publication: PubMed 19602027Park JH, Pak HN, Choi EJ, Jang JK, Kim SK, Choi DH, Choi JI, Hwang C, Kim YH. The relationship between endocardial voltage and regional volume in electroanatomical remodeled left atria in patients with atrial fibrillation: comparison of three-dimensional computed tomographic images and voltage mapping. J Cardiovasc Electrophysiol. 2009 Dec;20(12):1349-56. doi: 10.1111/j.1540-8167.2009.01557.x.
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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.
Xinhua Wang, MD,PHD principal investigator
Shanghai Jiao Tong University School of Medicine
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing individualized substrate modification and stepwise ablation in people with Atrial Fibrillation, run by RenJi Hospital at 1 site in China.
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 5 inclusion and 4 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: status not confirmed, as of the sponsor's last update on 23 Jun 2015. 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 China. 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.
Are results available for this study?
Results are not available in the source record.
How can a doctor refer a patient or contact the research team?
Contact Xinhua Wang, MD,PHD (862168385206, ttwwxh@126.com), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
atrial fibrillation free rate on or off antiarrhythmic drugs (AADs) after initial ablation (time frame: 1 year). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT02477592, which also lists 12 linked publications.
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 23 Jun 2015.