Atrial FibrillationCIRCA-EGDNCT02467166
Evaluation of the CIRCA Monitoring System in Prevention of Esophageal Lesions Following RFCA
A study testing Circa™ Probe in people with Atrial Fibrillation, run by University of California, San Diego at 1 site in United States.
Trial summary
The purpose of this study is to determine if the use of Circa™ temperature monitoring system during ablation procedures will reduce the risk of esophageal lesions or damage. Esophageal lesions caused by ablation could later develop into a potentially fatal atrio-esophageal fistula, which is hole between the upper… Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Atrial Fibrillation
- What is being tested?
- Circa™ Probe
- Type of treatment
- Medical device
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 40 participants
- Where
- 1 siteUnited States
- Study dates
- Jun 2015to 5 May 2020
- Phase
- Interventional
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
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
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Must have atrial fibrillation and be scheduled for AF ablation, during which the Circa esophageal temperature probe will be used to guide ablation.
- Must give written informed consent
Who cannot join
- Patient's refusal to participate in the study
- Any known esophageal disease or prior injury that would preclude esophagoscopy
- Any complications occuring during or after AF ablation that would result in esophagoscopy being an added significant risk to the patient beyond the known potential risks from the esophagoscopy
- Prior AF ablation
Trial locations and contacts
1 site in 1 country.
United States1 site
Sulpizio Cardiovascular Center
La Jolla, California, 92037
About this study
Official title: A Prospective, Non-Randomized Study to Evaluate the CIRCA Esophageal Temperature Monitoring System in Prevention of Esophageal Lesions Following Atrial Fibrillation Radiofrequency Catheter Ablation
The purpose of this study is to determine if the use of Circa™ temperature monitoring system during ablation procedures will reduce the risk of esophageal lesions or damage. Esophageal lesions caused by ablation could later develop into a potentially fatal atrio-esophageal fistula, which is hole between the upper chamber of the heart and the esophagus. Although development of atrio-esophageal fistula following atrial fibrillation ablation is extremely rare, the complication is severe and potentially life-threatening. Therefore, monitoring of esophageal temperatures has been adopted to prevent the development of esophageal lesions. The Circa™ temperature monitoring system allows cardiac electrophysiologists to monitor and thereby limit temperatures as well as duration of ablation in the esophagus throughout the procedure.
Read the detailed description
Dr. Gregory Feld, M.D. is conducting a research study to find out more about the short-term effects on the esophagus of left atrial ablation (guided by Circa™ esophageal temperature monitoring system). The financial supporter of this study is Circa Scientific, LLC.
When the investigators perform a radiofrequency catheter ablation (RFCA) at UCSD, the investigators routinely use the Circa™ temperature monitor system to prevent damage to the esophagus. For this study, patients will receive an esophagoscopy, a procedure in which a flexible tube with a camera is inserted through the mouth into the esophagus. The esophagoscopy will be conducted the next day following the ablation procedure to examine the lining of the esophagus for possible lesions or damage. Patients are asked to participate in this study because they are scheduled to have an ablation for atrial fibrillation (AF). There will be approximately 40 participants in this study at the University of California, San Diego (UCSD) Cardiovascular Center. The use of the Circa™ temperature monitoring system used in standard ablation procedures at UCSD and will be used whether or not patients decide to participate in this study. Using esophagoscopy, this study will evaluate the lining of the esophagus, or swallowing tube between the throat and stomach, the day following atrial fibrillation ablation by using an endoscope, flexible tube equipped with a camera.
Patients enrolled in the study will proceed to their standard of care ablation procedure for treatment of atrial fibrillation. There will be no changes to the ablation as part of this research study. The Circa™ temperature monitor system will be used throughout the ablation as is standard clinical care for all patients receiving AF ablations at UCSD. For research purposes only, patients will undergo an esophagoscopy, or endoscopic evaluation of the esophagus, the next day following the atrial fibrillation ablation. This procedure will take 40-45 minutes, and will involve inserting a flexible probe (tube) with a camera, into the throat and esophagus (swallowing tube), where it will be inspected for any damage (thermal lesions) caused during the ablation procedure.
Following the procedure, patients will be monitored in the usual fashion in the procedure treatment unit (PTU), as is standard of care following AF ablation. Ablation patients will be discharged from the hospital in a standard manner after esophagoscopy and asked to schedule a follow-up appointment following ablation, as is standard of care. There will not be any research follow-up for this study. If for any reason patients cannot complete the ablation or esophagoscopy procedure, patient will be withdrawn from study.
- Conditions
- Atrial Fibrillation
- Being tested
- Circa™ Probe
- Keywords
- esophagoscopy, atrial fibrillation ablation, radio frequency catheter ablation, esophageal lesion, arrhythmia, atrial fibrillation, AF, esophageal damage
- Medical subject headings
- Atrial Fibrillation, Arrhythmias, Cardiac
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Circa™ ProbeDevice
Also called CIRCA, K112376
The Circa™ probe will be used to monitor esophageal temperature and guide ablation power and duration during the RFCA procedure. Following ablation esophagoscopy will be performed to assess for esophageal lesions.
| Study group | Role | What they receive |
|---|---|---|
| Circa™ Probe | Experimental | The Circa™ Probe will be used during the RFCA to monitor esophageal temperature. Following ablation, the esophagoscopy will be performed to examine the esophagus for resulting thermal lesions. Receives: Device: Circa™ Probe |
What is being measured
The primary outcome is the main question the study is designed to answer.
Number of Esophageal Lesions.
The number of esophageal lesions observed by esophageal endoscopy after left atrial radiofrequency catheter ablation for atrial fibrillation.
Measured: Day 1
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted9 Jun 2015 (estimated)
- Study startJun 2015
- Primary completion30 Mar 2020
- Study completion5 May 2020
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Publications (8)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 University of California, San DiegoThe 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
- Prevention
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 40 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of California, San Diego
- Sponsor type
- University, hospital or other
- Collaborators
- Circa Scientific, Inc.
- Responsible party
- Principal investigator, Greg Feld, University of California, San Diego
- Investigators
- Gregory Feld, MD, Principal investigator, UC San Diego
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT02467166
- Sponsor's protocol ID
- 150018
- Acronym
- CIRCA-EGD
- Status last verified
- May 2021
- First submitted
- 3 Jun 2015
- Last updated
- 2 Jun 2021
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- No
- Individual data sharing
- No
Publications
Martinek M, Bencsik G, Aichinger J, Hassanein S, Schoefl R, Kuchinka P, Nesser HJ, Purerfellner H. Esophageal damage during radiofrequency ablation of atrial fibrillation: impact of energy settings, lesion sets, and esophageal visualization. J Cardiovasc Electrophysiol. 2009 Jul;20(7):726-33. doi: 10.1111/j.1540-8167.2008.01426.x. Epub 2009 Feb 2.
PubMed 19207781Dagres N, Anastasiou-Nana M. Prevention of atrial-esophageal fistula after catheter ablation of atrial fibrillation. Curr Opin Cardiol. 2011 Jan;26(1):1-5. doi: 10.1097/HCO.0b013e328341387d.
PubMed 21099683Halm U, Gaspar T, Zachaus M, Sack S, Arya A, Piorkowski C, Knigge I, Hindricks G, Husser D. Thermal esophageal lesions after radiofrequency catheter ablation of left atrial arrhythmias. Am J Gastroenterol. 2010 Mar;105(3):551-6. doi: 10.1038/ajg.2009.625. Epub 2009 Nov 3.
PubMed 19888201Sause A, Tutdibi O, Pomsel K, Dinh W, Futh R, Lankisch M, Glosemeyer-Allhoff T, Janssen J, Muller M. Limiting esophageal temperature in radiofrequency ablation of left atrial tachyarrhythmias results in low incidence of thermal esophageal lesions. BMC Cardiovasc Disord. 2010 Oct 26;10:52. doi: 10.1186/1471-2261-10-52.
PubMed 20977747Zellerhoff S, Ullerich H, Lenze F, Meister T, Wasmer K, Monnig G, Kobe J, Milberg P, Bittner A, Domschke W, Breithardt G, Eckardt L. Damage to the esophagus after atrial fibrillation ablation: Just the tip of the iceberg? High prevalence of mediastinal changes diagnosed by endosonography. Circ Arrhythm Electrophysiol. 2010 Apr;3(2):155-9. doi: 10.1161/CIRCEP.109.915918. Epub 2010 Mar 1.
PubMed 20194799Carroll BJ, Contreras-Valdes FM, Heist EK, Barrett CD, Danik SB, Ruskin JN, Mansour M. Multi-sensor esophageal temperature probe used during radiofrequency ablation for atrial fibrillation is associated with increased intraluminal temperature detection and increased risk of esophageal injury compared to single-sensor probe. J Cardiovasc Electrophysiol. 2013 Sep;24(9):958-64. doi: 10.1111/jce.12180. Epub 2013 Jun 7.
PubMed 23746064Feld GK, Tate C, Hsu J. Esophageal temperature monitoring during AF ablation: multi-sensor or single-sensor probe? J Cardiovasc Electrophysiol. 2013 Dec;24(12):E24. doi: 10.1111/jce.12305. Epub 2013 Nov 14. No abstract available.
PubMed 24118278ASGE Standards of Practice Committee; Evans JA, Early DS, Fukami N, Ben-Menachem T, Chandrasekhara V, Chathadi KV, Decker GA, Fanelli RD, Fisher DA, Foley KQ, Hwang JH, Jain R, Jue TL, Khan KM, Lightdale J, Malpas PM, Maple JT, Pasha SF, Saltzman JR, Sharaf RN, Shergill A, Dominitz JA, Cash BD; Standards of Practice Committee of the American Society for Gastrointestinal Endoscopy. The role of endoscopy in Barrett's esophagus and other premalignant conditions of the esophagus. Gastrointest Endosc. 2012 Dec;76(6):1087-94. doi: 10.1016/j.gie.2012.08.004. No abstract available.
PubMed 23164510
Study at a glance
From the registry record, last updated by the sponsor on 2 Jun 2021. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Prospective, Non-Randomized Study to Evaluate the CIRCA Esophageal Temperature Monitoring System in Prevention of Esophageal Lesions Following Atrial Fibrillation Radiofrequency Catheter Ablation
- ClinicalTrials.gov ID
- NCT02467166
- Acronym / sponsor ID
- CIRCA-EGD / 150018
- Conditions
- Atrial Fibrillation
- Keywords
- esophagoscopy, atrial fibrillation ablation, radio frequency catheter ablation, esophageal lesion, arrhythmia, atrial fibrillation, AF, esophageal damage
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 40 participants (actual)
- Lead sponsor
- University of California, San DiegoUniversity, hospital or other
- Collaborators
- Circa Scientific, Inc.
- Study start
- Jun 2015
- Primary completion
- 30 Mar 2020 (actual)
- Study completion
- 5 May 2020 (actual)
- First posted
- 9 Jun 2015 (estimated)
- Results
- Posted 2 Jun 2021
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 determine if the use of Circa™ temperature monitoring system during ablation procedures will reduce the risk of esophageal lesions or damage. Esophageal lesions caused by ablation could later develop into a potentially fatal atrio-esophageal fistula, which is hole between the upper chamber of the heart and the esophagus. Although development of atrio-esophageal fistula following atrial fibrillation ablation is extremely rare, the complication is severe and potentially life-threatening. Therefore, monitoring of esophageal temperatures has been adopted to prevent the development of esophageal lesions. The Circa™ temperature monitoring system allows cardiac electrophysiologists to monitor and thereby limit temperatures as well as duration of ablation in the esophagus throughout the procedure.
Detailed description
Dr. Gregory Feld, M.D. is conducting a research study to find out more about the short-term effects on the esophagus of left atrial ablation (guided by Circa™ esophageal temperature monitoring system). The financial supporter of this study is Circa Scientific, LLC.
When the investigators perform a radiofrequency catheter ablation (RFCA) at UCSD, the investigators routinely use the Circa™ temperature monitor system to prevent damage to the esophagus. For this study, patients will receive an esophagoscopy, a procedure in which a flexible tube with a camera is inserted through the mouth into the esophagus. The esophagoscopy will be conducted the next day following the ablation procedure to examine the lining of the esophagus for possible lesions or damage. Patients are asked to participate in this study because they are scheduled to have an ablation for atrial fibrillation (AF). There will be approximately 40 participants in this study at the University of California, San Diego (UCSD) Cardiovascular Center. The use of the Circa™ temperature monitoring system used in standard ablation procedures at UCSD and will be used whether or not patients decide to participate in this study. Using esophagoscopy, this study will evaluate the lining of the esophagus, or swallowing tube between the throat and stomach, the day following atrial fibrillation ablation by using an endoscope, flexible tube equipped with a camera.
Patients enrolled in the study will proceed to their standard of care ablation procedure for treatment of atrial fibrillation. There will be no changes to the ablation as part of this research study. The Circa™ temperature monitor system will be used throughout the ablation as is standard clinical care for all patients receiving AF ablations at UCSD. For research purposes only, patients will undergo an esophagoscopy, or endoscopic evaluation of the esophagus, the next day following the atrial fibrillation ablation. This procedure will take 40-45 minutes, and will involve inserting a flexible probe (tube) with a camera, into the throat and esophagus (swallowing tube), where it will be inspected for any damage (thermal lesions) caused during the ablation procedure.
Following the procedure, patients will be monitored in the usual fashion in the procedure treatment unit (PTU), as is standard of care following AF ablation. Ablation patients will be discharged from the hospital in a standard manner after esophagoscopy and asked to schedule a follow-up appointment following ablation, as is standard of care. There will not be any research follow-up for this study. If for any reason patients cannot complete the ablation or esophagoscopy procedure, patient will be withdrawn from study.
Study design
- Primary purpose
- Prevention
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Circa™ Probe | Experimental | Device: Circa™ ProbeThe Circa™ Probe will be used during the RFCA to monitor esophageal temperature. Following ablation, the esophagoscopy will be performed to examine the esophagus for resulting thermal lesions. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (2 listed)
- Must have atrial fibrillation and be scheduled for AF ablation, during which the Circa esophageal temperature probe will be used to guide ablation.
- Must give written informed consent
Key exclusion criteria (4 listed)
- Patient's refusal to participate in the study
- Any known esophageal disease or prior injury that would preclude esophagoscopy
- Any complications occuring during or after AF ablation that would result in esophagoscopy being an added significant risk to the patient beyond the known potential risks from the esophagoscopy
- Prior AF ablation
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 |
|---|---|---|
| Circa™ ProbeAlso: CIRCA, K112376The Circa™ probe will be used to monitor esophageal temperature and guide ablation power and duration during the RFCA procedure. Following ablation esophagoscopy will be performed to assess for esophageal lesions. | Device | Circa™ Probe |
Primary outcome
Number of Esophageal Lesions.
Time frame: Day 1
The number of esophageal lesions observed by esophageal endoscopy after left atrial radiofrequency catheter ablation for atrial fibrillation.
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 2 Jun 2021.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Background: PubMed 19207781Martinek M, Bencsik G, Aichinger J, Hassanein S, Schoefl R, Kuchinka P, Nesser HJ, Purerfellner H. Esophageal damage during radiofrequency ablation of atrial fibrillation: impact of energy settings, lesion sets, and esophageal visualization. J Cardiovasc Electrophysiol. 2009 Jul;20(7):726-33. doi: 10.1111/j.1540-8167.2008.01426.x. Epub 2009 Feb 2.
- Background: PubMed 21099683Dagres N, Anastasiou-Nana M. Prevention of atrial-esophageal fistula after catheter ablation of atrial fibrillation. Curr Opin Cardiol. 2011 Jan;26(1):1-5. doi: 10.1097/HCO.0b013e328341387d.
- Background: PubMed 19888201Halm U, Gaspar T, Zachaus M, Sack S, Arya A, Piorkowski C, Knigge I, Hindricks G, Husser D. Thermal esophageal lesions after radiofrequency catheter ablation of left atrial arrhythmias. Am J Gastroenterol. 2010 Mar;105(3):551-6. doi: 10.1038/ajg.2009.625. Epub 2009 Nov 3.
- Background: PubMed 20977747Sause A, Tutdibi O, Pomsel K, Dinh W, Futh R, Lankisch M, Glosemeyer-Allhoff T, Janssen J, Muller M. Limiting esophageal temperature in radiofrequency ablation of left atrial tachyarrhythmias results in low incidence of thermal esophageal lesions. BMC Cardiovasc Disord. 2010 Oct 26;10:52. doi: 10.1186/1471-2261-10-52.
- Background: PubMed 20194799Zellerhoff S, Ullerich H, Lenze F, Meister T, Wasmer K, Monnig G, Kobe J, Milberg P, Bittner A, Domschke W, Breithardt G, Eckardt L. Damage to the esophagus after atrial fibrillation ablation: Just the tip of the iceberg? High prevalence of mediastinal changes diagnosed by endosonography. Circ Arrhythm Electrophysiol. 2010 Apr;3(2):155-9. doi: 10.1161/CIRCEP.109.915918. Epub 2010 Mar 1.
- Background: PubMed 23746064Carroll BJ, Contreras-Valdes FM, Heist EK, Barrett CD, Danik SB, Ruskin JN, Mansour M. Multi-sensor esophageal temperature probe used during radiofrequency ablation for atrial fibrillation is associated with increased intraluminal temperature detection and increased risk of esophageal injury compared to single-sensor probe. J Cardiovasc Electrophysiol. 2013 Sep;24(9):958-64. doi: 10.1111/jce.12180. Epub 2013 Jun 7.
- Background: PubMed 24118278Feld GK, Tate C, Hsu J. Esophageal temperature monitoring during AF ablation: multi-sensor or single-sensor probe? J Cardiovasc Electrophysiol. 2013 Dec;24(12):E24. doi: 10.1111/jce.12305. Epub 2013 Nov 14. No abstract available.
- Background: PubMed 23164510ASGE Standards of Practice Committee; Evans JA, Early DS, Fukami N, Ben-Menachem T, Chandrasekhara V, Chathadi KV, Decker GA, Fanelli RD, Fisher DA, Foley KQ, Hwang JH, Jain R, Jue TL, Khan KM, Lightdale J, Malpas PM, Maple JT, Pasha SF, Saltzman JR, Sharaf RN, Shergill A, Dominitz JA, Cash BD; Standards of Practice Committee of the American Society for Gastrointestinal Endoscopy. The role of endoscopy in Barrett's esophagus and other premalignant conditions of the esophagus. Gastrointest Endosc. 2012 Dec;76(6):1087-94. doi: 10.1016/j.gie.2012.08.004. No abstract available.
- Individual participant dataSharing planned: No
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Atrial Fibrillation (AF)
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.
Gregory Feld, MD principal investigator
UC San Diego
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Circa™ Probe in people with Atrial Fibrillation, run by University of California, San Diego at 1 site in United States.
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 2 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: finished, as of the sponsor's last update on 2 Jun 2021. 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 United States. 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?
Yes. Results are posted in the registry (first posted 2 Jun 2021). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
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?
Number of Esophageal Lesions. (time frame: Day 1). 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 NCT02467166, which also lists 8 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 2 Jun 2021.