Atrial FibrillationNCT04769310
Advanced Cardiac Imaging To Predict Embolic Stroke On Brain MRI: A Pilot Study
A study testing Cardiac and Brain MRI in people with Atrial Fibrillation and Stroke, run by Tulane University at 1 site in United States.
Trial summary
Demonstrating the pathophysiological link between Left Atrial (LA) and Left Atrial Appendage (LAA) pathology and embolic strokes in non-Atrial Fibrillation (AF) individuals represents a major advance in stroke prevention strategies. Read more about this study
- Who is it for?
- Ages 18 to 120 years
- Conditions the study is for
- Atrial Fibrillation, Stroke, Stroke, Cardiovascular
- What is being tested?
- Cardiac and Brain MRI
- Type of treatment
- Injection or infusion, Medical device
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 5 participants
- Where
- 1 siteUnited States
- Study dates
- 26 Apr 2021to 27 Jan 2026
- 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 120 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Male or female patients
- 18 Years and older
- No history of atrial fibrillation
- CHA2DS2VASC score ≥3
- History pf type II diabetes
- History of congestive heart failure or a history of transient ischemic attack (TIA)/stroke without an otherwise defined stroke etiology such as large vessel or small vessel disease
Who cannot join
- History of atrial fibrillation
- Patients who had a clinically symptomatic acute stroke within the last 30-days
- Any health-related gadolinium/MRI contraindication (including previous allergic reaction to Gadolinium, pacemakers, defibrillators, other devices/implants contraindicated for MRI)
- Estimated glomerular filtration rate (eGFR) cutoff in patients with Chronic kidney disease (CKD) where gadolinium cannot be used equals an eGFR <30 ml/min
- Weighing > 300 lbs (as CMR image quality decreases due to increased body mass index)
- Current pregnancy or breastfeeding
- Cognitive impairment preventing the patient from giving an informed consent
Trial locations and contacts
1 site in 1 country.
United States1 site
Tulane University Medical Center
New Orleans, Louisiana, 70112
About this study
Demonstrating the pathophysiological link between Left Atrial (LA) and Left Atrial Appendage (LAA) pathology and embolic strokes in non-Atrial Fibrillation (AF) individuals represents a major advance in stroke prevention strategies. Instead of relying on non-specific criteria for stroke risk assessment, the investigators propose to identify individuals with high-risk of embolic stroke using imaging criteria that reflect the underlying pathophysiology of embolic stroke of cardiac origin. the investigators can therefore lay the groundwork for future anticoagulation strategies for stroke prevention beyond AF.
Read the detailed description
The investigators propose a cross-sectional cohort study, where individuals with no history of AF and with a Congestive heart failure, Hypertension, Age ≥ 75 years, Diabetes mellitus, Stroke or transient ischemic attack (TIA), Vascular disease, Age 65 to 74 years, Sex category score (CHA2DS2VASC) ≥3, type II diabetes, congestive heart failure or a history of stroke/TIA will be included. Data on demographics, personal health habits, medications, and medical history will be obtained by interviewing participants and reviewing the electronic medical records. All participants will undergo a Cardiac Magnetic Resonance imaging (CMR) to assess for markers of LA and LAA pathology. Markers of LA and LAA pathology that will be studied include: LA fibrosis level, LA functional parameters, LA shape characteristics, and LAA characteristics (including morphology, orifice area and flow velocity). Additionally, all participants will undergo a brain Magnetic Resonance Imaging (MRI) at the same visit to assess for the presence of embolic-appearing brain infarcts, regardless of previous stroke-related symptoms.
The investigators will analyze the association between each cardiac imaging feature and the prevalence of embolic-appearing strokes on brain MRI to determine whether patients with higher LA and LAA remodeled features are more likely to have embolic-appearing brain infarcts on MRI. The LA and LAA pathology imaging features with the strongest statistical association will be used to develop an imaging predictive score capable of identifying patients with the highest risk of embolic stroke.
All brain and cardiac imaging data will be assessed by experienced operators at Tulane Medical Center facilities. Operators analyzing CMR will be blinded to brain MRI results, and operators assessing brain MRI will be blinded to CMR results. The study will include a single center study at Tulane Medical Center and Clinics, with investigators from different medical specialties, and the proper facilities and equipment to conduct the project accurately and safely. The investigators expect a recruitment of 120 subjects over a period of 18 months from both cardiology and neurology clinics to complete the study.
- Conditions
- Atrial Fibrillation, Stroke, Stroke, Cardiovascular, Vascular Cognitive Impairment, Strokes Thrombotic, Stroke, Ischemic
- Being tested
- Cardiac and Brain MRI
- Keywords
- Magnetic Resonance Imaging, Cardiac Magnetic Resonance Imaging, Brain infarcts, Left atrial, Left atrial appendage, Non invasive cardiac imaging
- Medical subject headings
- Atrial Fibrillation, Stroke, Myocardial Infarction, Thrombotic Stroke, Ischemic Stroke, Brain Infarction
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Cardiac and Brain MRIDevice
A CMR to evaluate for LA and LAA high-risk features on either a 1.5 or 3 Tesla clinical MR scanner will be used. Gadolinium injection will be administered. Gadolinium is a contrast product that helps define areas of fibrosis in the LA.
High-resolution brain MRI with no contrast will include the following sequences for most accurate assessment of embolic lesions: 3D T1 MPRAGE, 3D FLAIR, DWI, ADC, and SWI
| Study group | Role | What they receive |
|---|---|---|
| Patient arm | Other | All patients will undergo a CMR to evaluate for LA and LAA high-risk features on either a 1.5 or 3 Tesla clinical MR scanner. Gadolinium injection will be administered. Gadolinium is a contrast product that helps define areas of fibrosis in the LA.
High-resolution brain MRI with no contrast will include the following sequences for most accurate assessment of embolic lesions: 3D T1 MPRAGE, 3D FLAIR, DWI, ADC, and SWI Receives: Device: Cardiac and Brain MRI |
What is being measured
The primary outcome is the main question the study is designed to answer.
The presence of covert embolic cerebral infarcts
The covert embolic cerebral infarcts are defined as the presence of asymptomatic non-lacunar embolic infarct (acute or chronic based on MRI appearance), in the cortex, and juxtacortical regions, and cerebellum. They will be identified using brain MRI.
Measured: Day1
Secondary outcomes (3)
Number of counts of lacunar covert infracts
Covert lacunar infarcts are asymptomatic infarct < 15mm in greatest diameter in subcortical brain regions. They will be identified by size and location using brain MRI images.
Measured: Day1
Number of counts of lacunar symptomatic infracts
Symptomatic lacunar infarcts are symptomatic infarct < 15mm in greatest diameter in subcortical brain regions. They will be identified by size and location using brain MRI images.
Measured: Day1
Number of counts of embolic symptomatic infracts
Symptomatic non-lacunar embolic infarcts are symptomatic infarcts of any size in the cortex or infarcts >15 mm in greatest diameter in subcortical lesions. They will be identified by size and location using brain MRI images.
Measured: Day1
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted24 Feb 2021
- Study start26 Apr 2021
- Primary completion27 Jan 2026
- Study completion27 Jan 2026
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (31)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 Tulane UniversityThe 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
- Diagnosis
- Allocation
- Not applicable
- Intervention model
- Single group
- Model description
- All patients will undergo a CMR to evaluate for LA and LAA high-risk features on either a 1.5 or 3 Tesla clinical MR scanner. CMR protocol will include Cine MRI, contrast-enhanced (CE) MR Angiography (MRA), time-resolved 2D phase-contrast (PC) MRI, and 3D late gadolinium enhancement (LGE) involving gadolinium injection. Gadolinium is a contrast product that helps define areas of fibrosis in the LA. Brain MRI will be used for the detection of embolic infarcts assessed on high-resolution brain MRI acquisitions. The high-resolution brain MRI with no contrast will include the following sequences for most accurate assessment of embolic lesions: 3D T1 Magnetization Prepared Rapid Acquisition Gradient Echo (MPRAGE), 3D fluid attenuated inversion recovery (FLAIR), diffusion weighted imaging (DWI), apparent diffusion coefficient maps (ADC), and susceptibility weighted imaging (SWI).
- Masking
- None (open label)
- Enrolment
- 5 participants (actual)
Sponsor and investigators
- Lead sponsor
- Tulane University
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
- Investigators
- Nassir Marrouche, MD, Principal investigator, Tulane School of Medicine
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04769310
- Sponsor's protocol ID
- 2020-2151
- Status last verified
- Mar 2026
- First submitted
- 19 Feb 2021
- Last updated
- 5 Mar 2026
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- Yes
Publications
Writing Group Members; Mozaffarian D, Benjamin EJ, Go AS, Arnett DK, Blaha MJ, Cushman M, Das SR, de Ferranti S, Despres JP, Fullerton HJ, Howard VJ, Huffman MD, Isasi CR, Jimenez MC, Judd SE, Kissela BM, Lichtman JH, Lisabeth LD, Liu S, Mackey RH, Magid DJ, McGuire DK, Mohler ER 3rd, Moy CS, Muntner P, Mussolino ME, Nasir K, Neumar RW, Nichol G, Palaniappan L, Pandey DK, Reeves MJ, Rodriguez CJ, Rosamond W, Sorlie PD, Stein J, Towfighi A, Turan TN, Virani SS, Woo D, Yeh RW, Turner MB; American Heart Association Statistics Committee; Stroke Statistics Subcommittee. Heart Disease and Stroke Statistics-2016 Update: A Report From the American Heart Association. Circulation. 2016 Jan 26;133(4):e38-360. doi: 10.1161/CIR.0000000000000350. Epub 2015 Dec 16. No abstract available.
PubMed 26673558Saver JL. CLINICAL PRACTICE. Cryptogenic Stroke. N Engl J Med. 2016 May 26;374(21):2065-74. doi: 10.1056/NEJMcp1503946. No abstract available.
PubMed 27223148Fanning JP, Wong AA, Fraser JF. The epidemiology of silent brain infarction: a systematic review of population-based cohorts. BMC Med. 2014 Jul 9;12:119. doi: 10.1186/s12916-014-0119-0.
PubMed 25012298Fanning JP, Wesley AJ, Wong AA, Fraser JF. Emerging spectra of silent brain infarction. Stroke. 2014 Nov;45(11):3461-71. doi: 10.1161/STROKEAHA.114.005919. Epub 2014 Oct 7. No abstract available.
PubMed 25293663Vermeer SE, Prins ND, den Heijer T, Hofman A, Koudstaal PJ, Breteler MM. Silent brain infarcts and the risk of dementia and cognitive decline. N Engl J Med. 2003 Mar 27;348(13):1215-22. doi: 10.1056/NEJMoa022066.
PubMed 12660385Gupta A, Giambrone AE, Gialdini G, Finn C, Delgado D, Gutierrez J, Wright C, Beiser AS, Seshadri S, Pandya A, Kamel H. Silent Brain Infarction and Risk of Future Stroke: A Systematic Review and Meta-Analysis. Stroke. 2016 Mar;47(3):719-25. doi: 10.1161/STROKEAHA.115.011889.
PubMed 26888534Brambatti M, Connolly SJ, Gold MR, Morillo CA, Capucci A, Muto C, Lau CP, Van Gelder IC, Hohnloser SH, Carlson M, Fain E, Nakamya J, Mairesse GH, Halytska M, Deng WQ, Israel CW, Healey JS; ASSERT Investigators. Temporal relationship between subclinical atrial fibrillation and embolic events. Circulation. 2014 May 27;129(21):2094-9. doi: 10.1161/CIRCULATIONAHA.113.007825. Epub 2014 Mar 14.
PubMed 24633881Daoud EG, Glotzer TV, Wyse DG, Ezekowitz MD, Hilker C, Koehler J, Ziegler PD; TRENDS Investigators. Temporal relationship of atrial tachyarrhythmias, cerebrovascular events, and systemic emboli based on stored device data: a subgroup analysis of TRENDS. Heart Rhythm. 2011 Sep;8(9):1416-23. doi: 10.1016/j.hrthm.2011.04.022. Epub 2011 Apr 23.
PubMed 21699833Friberg L, Rosenqvist M, Lip GY. Evaluation of risk stratification schemes for ischaemic stroke and bleeding in 182 678 patients with atrial fibrillation: the Swedish Atrial Fibrillation cohort study. Eur Heart J. 2012 Jun;33(12):1500-10. doi: 10.1093/eurheartj/ehr488. Epub 2012 Jan 13.
PubMed 22246443Fang MC, Go AS, Chang Y, Borowsky L, Pomernacki NK, Singer DE; ATRIA Study Group. Comparison of risk stratification schemes to predict thromboembolism in people with nonvalvular atrial fibrillation. J Am Coll Cardiol. 2008 Feb 26;51(8):810-5. doi: 10.1016/j.jacc.2007.09.065.
PubMed 18294564Keogh C, Wallace E, Dillon C, Dimitrov BD, Fahey T. Validation of the CHADS2 clinical prediction rule to predict ischaemic stroke. A systematic review and meta-analysis. Thromb Haemost. 2011 Sep;106(3):528-38. doi: 10.1160/TH11-02-0061. Epub 2011 Jul 28.
PubMed 21800003Marrouche NF, Wilber D, Hindricks G, Jais P, Akoum N, Marchlinski F, Kholmovski E, Burgon N, Hu N, Mont L, Deneke T, Duytschaever M, Neumann T, Mansour M, Mahnkopf C, Herweg B, Daoud E, Wissner E, Bansmann P, Brachmann J. Association of atrial tissue fibrosis identified by delayed enhancement MRI and atrial fibrillation catheter ablation: the DECAAF study. JAMA. 2014 Feb 5;311(5):498-506. doi: 10.1001/jama.2014.3.
PubMed 24496537Zghaib T, Nazarian S. New Insights Into the Use of Cardiac Magnetic Resonance Imaging to Guide Decision Making in Atrial Fibrillation Management. Can J Cardiol. 2018 Nov;34(11):1461-1470. doi: 10.1016/j.cjca.2018.07.007. Epub 2018 Jul 12.
PubMed 30297256Bisbal F, Baranchuk A, Braunwald E, Bayes de Luna A, Bayes-Genis A. Atrial Failure as a Clinical Entity: JACC Review Topic of the Week. J Am Coll Cardiol. 2020 Jan 21;75(2):222-232. doi: 10.1016/j.jacc.2019.11.013.
PubMed 31948652King JB, Azadani PN, Suksaranjit P, Bress AP, Witt DM, Han FT, Chelu MG, Silver MA, Biskupiak J, Wilson BD, Morris AK, Kholmovski EG, Marrouche N. Left Atrial Fibrosis and Risk of Cerebrovascular and Cardiovascular Events in Patients With Atrial Fibrillation. J Am Coll Cardiol. 2017 Sep 12;70(11):1311-1321. doi: 10.1016/j.jacc.2017.07.758.
PubMed 28882227
Study at a glance
From the registry record, last updated by the sponsor on 5 Mar 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Advanced Cardiac Imaging To Predict Embolic Stroke On Brain MRI: A Pilot Study
- ClinicalTrials.gov ID
- NCT04769310
- Acronym / sponsor ID
- 2020-2151
- Conditions
- Atrial Fibrillation, Stroke, Stroke, Cardiovascular, Vascular Cognitive Impairment, Strokes Thrombotic, Stroke, Ischemic
- Keywords
- Magnetic Resonance Imaging, Cardiac Magnetic Resonance Imaging, Brain infarcts, Left atrial, Left atrial appendage, Non invasive cardiac imaging
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 5 participants (actual)
- Lead sponsor
- Tulane UniversityUniversity, hospital or other
- Study start
- 26 Apr 2021 (actual)
- Primary completion
- 27 Jan 2026 (actual)
- Study completion
- 27 Jan 2026 (actual)
- First posted
- 24 Feb 2021 (actual)
- 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.
Demonstrating the pathophysiological link between Left Atrial (LA) and Left Atrial Appendage (LAA) pathology and embolic strokes in non-Atrial Fibrillation (AF) individuals represents a major advance in stroke prevention strategies. Instead of relying on non-specific criteria for stroke risk assessment, the investigators propose to identify individuals with high-risk of embolic stroke using imaging criteria that reflect the underlying pathophysiology of embolic stroke of cardiac origin. the investigators can therefore lay the groundwork for future anticoagulation strategies for stroke prevention beyond AF.
Detailed description
The investigators propose a cross-sectional cohort study, where individuals with no history of AF and with a Congestive heart failure, Hypertension, Age ≥ 75 years, Diabetes mellitus, Stroke or transient ischemic attack (TIA), Vascular disease, Age 65 to 74 years, Sex category score (CHA2DS2VASC) ≥3, type II diabetes, congestive heart failure or a history of stroke/TIA will be included. Data on demographics, personal health habits, medications, and medical history will be obtained by interviewing participants and reviewing the electronic medical records. All participants will undergo a Cardiac Magnetic Resonance imaging (CMR) to assess for markers of LA and LAA pathology. Markers of LA and LAA pathology that will be studied include: LA fibrosis level, LA functional parameters, LA shape characteristics, and LAA characteristics (including morphology, orifice area and flow velocity). Additionally, all participants will undergo a brain Magnetic Resonance Imaging (MRI) at the same visit to assess for the presence of embolic-appearing brain infarcts, regardless of previous stroke-related symptoms.
The investigators will analyze the association between each cardiac imaging feature and the prevalence of embolic-appearing strokes on brain MRI to determine whether patients with higher LA and LAA remodeled features are more likely to have embolic-appearing brain infarcts on MRI. The LA and LAA pathology imaging features with the strongest statistical association will be used to develop an imaging predictive score capable of identifying patients with the highest risk of embolic stroke.
All brain and cardiac imaging data will be assessed by experienced operators at Tulane Medical Center facilities. Operators analyzing CMR will be blinded to brain MRI results, and operators assessing brain MRI will be blinded to CMR results. The study will include a single center study at Tulane Medical Center and Clinics, with investigators from different medical specialties, and the proper facilities and equipment to conduct the project accurately and safely. The investigators expect a recruitment of 120 subjects over a period of 18 months from both cardiology and neurology clinics to complete the study.
Study design
- Primary purpose
- Diagnosis
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
- Model description
- All patients will undergo a CMR to evaluate for LA and LAA high-risk features on either a 1.5 or 3 Tesla clinical MR scanner. CMR protocol will include Cine MRI, contrast-enhanced (CE) MR Angiography (MRA), time-resolved 2D phase-contrast (PC) MRI, and 3D late gadolinium enhancement (LGE) involving gadolinium injection. Gadolinium is a contrast product that helps define areas of fibrosis in the LA. Brain MRI will be used for the detection of embolic infarcts assessed on high-resolution brain MRI acquisitions. The high-resolution brain MRI with no contrast will include the following sequences for most accurate assessment of embolic lesions: 3D T1 Magnetization Prepared Rapid Acquisition Gradient Echo (MPRAGE), 3D fluid attenuated inversion recovery (FLAIR), diffusion weighted imaging (DWI), apparent diffusion coefficient maps (ADC), and susceptibility weighted imaging (SWI).
| Arm | Type | Receives |
|---|---|---|
| Patient arm | Other | Device: Cardiac and Brain MRIAll patients will undergo a CMR to evaluate for LA and LAA high-risk features on either a 1.5 or 3 Tesla clinical MR scanner. Gadolinium injection will be administered. Gadolinium is a contrast product that helps define areas of fibrosis in the LA. High-resolution brain MRI with no contrast will include the following sequences for most accurate assessment of embolic lesions: 3D T1 MPRAGE, 3D FLAIR, DWI, ADC, and SWI |
Who may qualify
- Ages
- 18 to 120 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (6 listed)
- Male or female patients
- 18 Years and older
- No history of atrial fibrillation
- CHA2DS2VASC score ≥3
- History pf type II diabetes
Key exclusion criteria (7 listed)
- History of atrial fibrillation
- Patients who had a clinically symptomatic acute stroke within the last 30-days
- Any health-related gadolinium/MRI contraindication (including previous allergic reaction to Gadolinium, pacemakers, defibrillators, other devices/implants contraindicated for MRI)
- Estimated glomerular filtration rate (eGFR) cutoff in patients with Chronic kidney disease (CKD) where gadolinium cannot be used equals an eGFR <30 ml/min
- Weighing > 300 lbs (as CMR image quality decreases due to increased body mass index)
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 |
|---|---|---|
| Cardiac and Brain MRIA CMR to evaluate for LA and LAA high-risk features on either a 1.5 or 3 Tesla clinical MR scanner will be used. Gadolinium injection will be administered. Gadolinium is a contrast product that helps define areas of fibrosis in the LA. High-resolution brain MRI with no contrast will include the following sequences for most accurate assessment of embolic lesions: 3D T1 MPRAGE, 3D FLAIR, DWI, ADC, and SWI | Device | Patient arm |
Primary outcome
The presence of covert embolic cerebral infarcts
Time frame: Day1
The covert embolic cerebral infarcts are defined as the presence of asymptomatic non-lacunar embolic infarct (acute or chronic based on MRI appearance), in the cortex, and juxtacortical regions, and cerebellum. They will be identified using brain MRI.
3 secondary outcomes
Number of counts of lacunar covert infracts
Time frame: Day1
Number of counts of lacunar symptomatic infracts
Time frame: Day1
Number of counts of embolic symptomatic infracts
Time frame: Day1
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 5 Mar 2026.
- Background: PubMed 26673558Writing Group Members; Mozaffarian D, Benjamin EJ, Go AS, Arnett DK, Blaha MJ, Cushman M, Das SR, de Ferranti S, Despres JP, Fullerton HJ, Howard VJ, Huffman MD, Isasi CR, Jimenez MC, Judd SE, Kissela BM, Lichtman JH, Lisabeth LD, Liu S, Mackey RH, Magid DJ, McGuire DK, Mohler ER 3rd, Moy CS, Muntner P, Mussolino ME, Nasir K, Neumar RW, Nichol G, Palaniappan L, Pandey DK, Reeves MJ, Rodriguez CJ, Rosamond W, Sorlie PD, Stein J, Towfighi A, Turan TN, Virani SS, Woo D, Yeh RW, Turner MB; American Heart Association Statistics Committee; Stroke Statistics Subcommittee. Heart Disease and Stroke Statistics-2016 Update: A Report From the American Heart Association. Circulation. 2016 Jan 26;133(4):e38-360. doi: 10.1161/CIR.0000000000000350. Epub 2015 Dec 16. No abstract available.
- Background: PubMed 27223148Saver JL. CLINICAL PRACTICE. Cryptogenic Stroke. N Engl J Med. 2016 May 26;374(21):2065-74. doi: 10.1056/NEJMcp1503946. No abstract available.
- Background: PubMed 25012298Fanning JP, Wong AA, Fraser JF. The epidemiology of silent brain infarction: a systematic review of population-based cohorts. BMC Med. 2014 Jul 9;12:119. doi: 10.1186/s12916-014-0119-0.
- Background: PubMed 25293663Fanning JP, Wesley AJ, Wong AA, Fraser JF. Emerging spectra of silent brain infarction. Stroke. 2014 Nov;45(11):3461-71. doi: 10.1161/STROKEAHA.114.005919. Epub 2014 Oct 7. No abstract available.
- Background: PubMed 12660385Vermeer SE, Prins ND, den Heijer T, Hofman A, Koudstaal PJ, Breteler MM. Silent brain infarcts and the risk of dementia and cognitive decline. N Engl J Med. 2003 Mar 27;348(13):1215-22. doi: 10.1056/NEJMoa022066.
- Background: PubMed 26888534Gupta A, Giambrone AE, Gialdini G, Finn C, Delgado D, Gutierrez J, Wright C, Beiser AS, Seshadri S, Pandya A, Kamel H. Silent Brain Infarction and Risk of Future Stroke: A Systematic Review and Meta-Analysis. Stroke. 2016 Mar;47(3):719-25. doi: 10.1161/STROKEAHA.115.011889.
- Background: PubMed 24633881Brambatti M, Connolly SJ, Gold MR, Morillo CA, Capucci A, Muto C, Lau CP, Van Gelder IC, Hohnloser SH, Carlson M, Fain E, Nakamya J, Mairesse GH, Halytska M, Deng WQ, Israel CW, Healey JS; ASSERT Investigators. Temporal relationship between subclinical atrial fibrillation and embolic events. Circulation. 2014 May 27;129(21):2094-9. doi: 10.1161/CIRCULATIONAHA.113.007825. Epub 2014 Mar 14.
- Background: PubMed 21699833Daoud EG, Glotzer TV, Wyse DG, Ezekowitz MD, Hilker C, Koehler J, Ziegler PD; TRENDS Investigators. Temporal relationship of atrial tachyarrhythmias, cerebrovascular events, and systemic emboli based on stored device data: a subgroup analysis of TRENDS. Heart Rhythm. 2011 Sep;8(9):1416-23. doi: 10.1016/j.hrthm.2011.04.022. Epub 2011 Apr 23.
- Background: PubMed 22246443Friberg L, Rosenqvist M, Lip GY. Evaluation of risk stratification schemes for ischaemic stroke and bleeding in 182 678 patients with atrial fibrillation: the Swedish Atrial Fibrillation cohort study. Eur Heart J. 2012 Jun;33(12):1500-10. doi: 10.1093/eurheartj/ehr488. Epub 2012 Jan 13.
- Background: PubMed 18294564Fang MC, Go AS, Chang Y, Borowsky L, Pomernacki NK, Singer DE; ATRIA Study Group. Comparison of risk stratification schemes to predict thromboembolism in people with nonvalvular atrial fibrillation. J Am Coll Cardiol. 2008 Feb 26;51(8):810-5. doi: 10.1016/j.jacc.2007.09.065.
- Background: PubMed 21800003Keogh C, Wallace E, Dillon C, Dimitrov BD, Fahey T. Validation of the CHADS2 clinical prediction rule to predict ischaemic stroke. A systematic review and meta-analysis. Thromb Haemost. 2011 Sep;106(3):528-38. doi: 10.1160/TH11-02-0061. Epub 2011 Jul 28.
- Background: PubMed 24496537Marrouche NF, Wilber D, Hindricks G, Jais P, Akoum N, Marchlinski F, Kholmovski E, Burgon N, Hu N, Mont L, Deneke T, Duytschaever M, Neumann T, Mansour M, Mahnkopf C, Herweg B, Daoud E, Wissner E, Bansmann P, Brachmann J. Association of atrial tissue fibrosis identified by delayed enhancement MRI and atrial fibrillation catheter ablation: the DECAAF study. JAMA. 2014 Feb 5;311(5):498-506. doi: 10.1001/jama.2014.3.
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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.
Nassir Marrouche, MD principal investigator
Tulane 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 Cardiac and Brain MRI in people with Atrial Fibrillation and Stroke, run by Tulane University 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 6 inclusion and 7 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 5 Mar 2026. 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?
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 presence of covert embolic cerebral infarcts (time frame: Day1). 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 NCT04769310, which also lists 31 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 5 Mar 2026.