Congenital Heart DiseaseNCT06081855
Predictors of Aortic Root Dilatation in Tetralogy of Fallot Patients
An observational study of Congenital Heart Disease and Aortic Root Dilatation, run by Assiut University.
Trial summary
To predict vulnerable patients for aortic root dilatation in TOF patients using CT as a reliable imaging modality, thus aiding early intervention, and identifying those who will require strict follow-up. Read more about this study
- Who is it for?
- Any ageHealthy volunteers can take part
- Conditions the study is for
- Congenital Heart Disease, Aortic Root Dilatation, Tetralogy of Fallot
- What is being tested?
- CT
- How many people
- 77 participants
- Where
- No sites listed yet
- Study dates
- 1 Jan 2024to 1 May 2025
- Phase
- Observational
- 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 Any age
- All sexes
- Healthy volunteers accepted
- Child, Adult, Older adult
Study population: Sample size was calculated using Epi- Info7. Based on aortic dilatation is found in 84.6 in follow up CT [12] With a confidence limits 5% and a confidence level of 80% the minimum patients required for this study is 77 cases.
Who may be able to join
- All patients with TOF who either underwent or have not yet had surgical correction.
- All patients with Fallot-type DORV.
- Patients should have survived until discharge and have at least one echocardiography and CT with full data related to one or more anatomic subcomponents of the aortic root, either before surgery or during follow-up, regardless of specific duration post repair.
Who cannot join
- Patients who have contraindication for conducting cardiac CT scan. For instance, dye sensitivity, pregnancy, CKD, in addition to patients who have factors that interfere with CT image quality as metallic objects within the chest (e.g. Pacemaker).
Trial locations and contacts
No sites are listed yet.
About this study
- To predict vulnerable patients for aortic root dilatation in TOF patients using CT as a reliable imaging modality, thus aiding early intervention, and identifying those who will require strict follow-up.
- To assess the prevalence of TOF patients who developed aortic root dilatation, and those who were complicated with dissection, AR, and aneurysm, through collecting data from a large center (Aswan Heart Centre).
- To investigate the relationship between age at repair and the diameter of aortic root.
Read the detailed description
Tetralogy of Fallot (TOF) occurs in approximately 3 to 5 of every 10,000 live births and is the most common cyanotic congenital heart defect and it exhibits four main features. These features are pulmonary stenosis, right ventricular hypertrophy, overriding aorta and ventricular septal defect. Moreover, since the survival of patients with congenital heart diseases has improved significantly in recent decades, long-term complications should be monitored cautiously. One of these complications is aortic root dilatation, attributed to increased and altered flow through the overriding aorta and an uneven sharing of conotruncal tissue between the aorta and pulmonary artery, particularly in patients who have not undergone early repair.
Despite the concern that TOF patients may harbor aortopathy that can lead to aortic regurgitation, aortic aneurysms, and, potentially, aortic dissection, the scope of the problem remains uncertain. Prevalence estimates of aortic root dilatation have ranged from 15% to 87% with the use of various criteria. Moderate to severe aortic regurgitation (AR) has also been reported in up to 12.5% of adults with TOF and dilated aortic roots. The incidence of aortic dissection and surgical intervention remains unknown. Moreover, features associated with aortic dilatation are not fully understood. Therefore, correlating and predicting vulnerable patients and identifying possible risk factors for aortic root dilatation in TOF patients, will enable more cautious follow-up and earlier intervention, thus decreasing possible morbidity and mortality.
- Being tested
- CT
- Medical subject headings
- Heart Defects, Congenital, Tetralogy of Fallot
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
CTDiagnostic test
Measuring aortic root diameter by CT
| Study group | Role | What they receive |
|---|---|---|
| Repaired TOF | Not described Receives: Diagnostic Test: CT | |
| Unrepaired TOF | Not described Receives: Diagnostic Test: CT |
What is being measured
The primary outcome is the main question the study is designed to answer.
Aortic root diameters
: Aortic root diameters at four levels:
- aortic annulus (AA)
- sinus of Valsalva (SoV)
- sinotubular junction (STJ)
- ascending aorta (AAo). AA will be measured as the inter-commissural distance in the aortic valve, SoV will be measured at the level of maximal diameter on the axial image, STJ will be measured at the level of transitional zone from STJ to AAo, and AAo will be measured at the level of the main pulmonary artery bifurcation. Aortic cross-sectional area will be calculated by π×(diameter/2)2 The largest diameters of each aortic structure as measured based on the chest CT will be re-calculated as z-scores. In our study, "significant dilatation of the aortic structures" is defined as 95% confidence interval (z-score≥2) in diameter of each aortic structures. Echocardiography will be performed to check other cardiac deformities, including AR.
Measured: Throughout the study duration, about 1 year
Secondary outcomes (2)
Aortic valve repair or surgical or transcatheter aortic valve replacement
Measured: Throughout the study duration, about 1 year
Severity of AR at latest follow-up or before the earliest aortic valve or root intervention.
Measured: Throughout the study duration, about 1 year
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted13 Oct 2023
- Study start1 Jan 2024 (estimated)
- Primary completion28 Feb 2025 (estimated)
- Study completion1 May 2025 (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 Congenital Heart DiseaseStudies of the same condition, open and under way.
- More trials run by Assiut 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
- Observational
- Observational model
- Cohort
- Time perspective
- Retrospective
- Enrolment
- 77 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Assiut University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Abdelrahman Gamal Ahmed Ramadan, Assiut University
- Investigators
- Amr Elbadry, MD, Study chair, Assiut University, Faculty of Medicine
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06081855
- Sponsor's protocol ID
- Aortic Root Dilatation in TOF
- Status last verified
- Oct 2023
- First submitted
- 27 Sep 2023
- Last updated
- 13 Oct 2023
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Publications
Expert Consensus Panel:; Miller JR, Stephens EH, Goldstone AB, Glatz AC, Kane L, Van Arsdell GS, Stellin G, Barron DJ, d'Udekem Y, Benson L, Quintessenza J, Ohye RG, Talwar S, Fremes SE, Emani SM, Eghtesady P. The American Association for Thoracic Surgery (AATS) 2022 Expert Consensus Document: Management of infants and neonates with tetralogy of Fallot. J Thorac Cardiovasc Surg. 2023 Jan;165(1):221-250. doi: 10.1016/j.jtcvs.2022.07.025. Epub 2022 Oct 26.
PubMed 36522807Goldstein BH, Petit CJ, Qureshi AM, McCracken CE, Kelleman MS, Nicholson GT, Law MA, Meadows JJ, Zampi JD, Shahanavaz S, Mascio CE, Chai PJ, Romano JC, Batlivala SP, Maskatia SA, Asztalos IB, Kamsheh AM, Healan SJ, Smith JD, Ligon RA, Pettus JA, Juma S, Raulston JEB, Hock KM, Pajk AL, Eilers LF, Khan HQ, Merritt TC, Canter M, Juergensen S, Rinderknecht FA, Bauser-Heaton H, Glatz AC. Comparison of Management Strategies for Neonates With Symptomatic Tetralogy of Fallot. J Am Coll Cardiol. 2021 Mar 2;77(8):1093-1106. doi: 10.1016/j.jacc.2020.12.048.
PubMed 33632484Niwa K, Siu SC, Webb GD, Gatzoulis MA. Progressive aortic root dilatation in adults late after repair of tetralogy of Fallot. Circulation. 2002 Sep 10;106(11):1374-8. doi: 10.1161/01.cir.0000028462.88597.ad.
PubMed 12221055Mongeon FP, Gurvitz MZ, Broberg CS, Aboulhosn J, Opotowsky AR, Kay JD, Valente AM, Earing MG, Lui GK, Fernandes SM, Gersony DR, Cook SC, Ting JG, Nickolaus MJ, Landzberg MJ, Khairy P; Alliance for Adult Research in Congenital Cardiology (AARCC). Aortic root dilatation in adults with surgically repaired tetralogy of fallot: a multicenter cross-sectional study. Circulation. 2013 Jan 15;127(2):172-9. doi: 10.1161/CIRCULATIONAHA.112.129585. Epub 2012 Dec 6.
PubMed 23224208Chong WY, Wong WH, Chiu CS, Cheung YF. Aortic root dilation and aortic elastic properties in children after repair of tetralogy of Fallot. Am J Cardiol. 2006 Mar 15;97(6):905-9. doi: 10.1016/j.amjcard.2005.09.141. Epub 2006 Feb 3.
PubMed 16516599Niwa K. Aortic root dilatation in tetralogy of Fallot long-term after repair--histology of the aorta in tetralogy of Fallot: evidence of intrinsic aortopathy. Int J Cardiol. 2005 Aug 18;103(2):117-9. doi: 10.1016/j.ijcard.2004.07.002.
PubMed 16080967Rathi VK, Doyle M, Williams RB, Yamrozik J, Shannon RP, Biederman RW. Massive aortic aneurysm and dissection in repaired tetralogy of Fallot; diagnosis by cardiovascular magnetic resonance imaging. Int J Cardiol. 2005 May 11;101(1):169-70. doi: 10.1016/j.ijcard.2004.05.037. No abstract available.
PubMed 15860407Konstantinov IE, Fricke TA, d'Udekem Y, Robertson T. Aortic dissection and rupture in adolescents after tetralogy of Fallot repair. J Thorac Cardiovasc Surg. 2010 Nov;140(5):e71-3. doi: 10.1016/j.jtcvs.2010.06.045. Epub 2010 Aug 1. No abstract available.
PubMed 20674941Colan SD, McElhinney DB, Crawford EC, Keane JF, Lock JE. Validation and re-evaluation of a discriminant model predicting anatomic suitability for biventricular repair in neonates with aortic stenosis. J Am Coll Cardiol. 2006 May 2;47(9):1858-65. doi: 10.1016/j.jacc.2006.02.020. Epub 2006 Apr 17.
PubMed 16682313Gautier M, Detaint D, Fermanian C, Aegerter P, Delorme G, Arnoult F, Milleron O, Raoux F, Stheneur C, Boileau C, Vahanian A, Jondeau G. Nomograms for aortic root diameters in children using two-dimensional echocardiography. Am J Cardiol. 2010 Mar 15;105(6):888-94. doi: 10.1016/j.amjcard.2009.11.040.
PubMed 20211339Mohammed AFA, Frick M, Kerst G, Hatam N, Elgamal MF, Essa KM, Hovels-Gurich HH, Vazquez-Jimenez JF, Zayat R. Proximal Aortic Dilatation and Pulmonary Valve Replacement in Patients with Repaired Tetralogy of Fallot: Is There a Relationship? A Cardiac Magnetic Resonance Imaging Study. J Clin Med. 2021 Nov 15;10(22):5296. doi: 10.3390/jcm10225296.
PubMed 34830578Kim W, Kwak JG, Cho S, Kim WH. Ten-year follow-up of dilatation of aortic structures in Fallot-type anomalies. Pediatr Cardiol. 2023 Oct;44(7):1552-1559. doi: 10.1007/s00246-023-03225-7. Epub 2023 Jul 5.
PubMed 37405457
Study at a glance
From the registry record, last updated by the sponsor on 13 Oct 2023. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Predictors of Aortic Root Dilatation in Tetralogy of Fallot Patients
- ClinicalTrials.gov ID
- NCT06081855
- Acronym / sponsor ID
- Aortic Root Dilatation in TOF
- Study type
- Observational
- Recruitment status
- Unknown status
- Enrolment
- 77 participants (estimated)
- Lead sponsor
- Assiut UniversityUniversity, hospital or other
- Study start
- 1 Jan 2024 (estimated)
- Primary completion
- 28 Feb 2025 (estimated)
- Study completion
- 1 May 2025 (estimated)
- First posted
- 13 Oct 2023 (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.
- To predict vulnerable patients for aortic root dilatation in TOF patients using CT as a reliable imaging modality, thus aiding early intervention, and identifying those who will require strict follow-up.
- To assess the prevalence of TOF patients who developed aortic root dilatation, and those who were complicated with dissection, AR, and aneurysm, through collecting data from a large center (Aswan Heart Centre).
- To investigate the relationship between age at repair and the diameter of aortic root.
Detailed description
Tetralogy of Fallot (TOF) occurs in approximately 3 to 5 of every 10,000 live births and is the most common cyanotic congenital heart defect and it exhibits four main features. These features are pulmonary stenosis, right ventricular hypertrophy, overriding aorta and ventricular septal defect. Moreover, since the survival of patients with congenital heart diseases has improved significantly in recent decades, long-term complications should be monitored cautiously. One of these complications is aortic root dilatation, attributed to increased and altered flow through the overriding aorta and an uneven sharing of conotruncal tissue between the aorta and pulmonary artery, particularly in patients who have not undergone early repair.
Despite the concern that TOF patients may harbor aortopathy that can lead to aortic regurgitation, aortic aneurysms, and, potentially, aortic dissection, the scope of the problem remains uncertain. Prevalence estimates of aortic root dilatation have ranged from 15% to 87% with the use of various criteria. Moderate to severe aortic regurgitation (AR) has also been reported in up to 12.5% of adults with TOF and dilated aortic roots. The incidence of aortic dissection and surgical intervention remains unknown. Moreover, features associated with aortic dilatation are not fully understood. Therefore, correlating and predicting vulnerable patients and identifying possible risk factors for aortic root dilatation in TOF patients, will enable more cautious follow-up and earlier intervention, thus decreasing possible morbidity and mortality.
Study design
- Observational model
- Cohort
- Time perspective
- Retrospective
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Repaired TOF | – | Diagnostic Test: CT |
| Unrepaired TOF | – | Diagnostic Test: CT |
Who may qualify
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Child, Adult, Older adult
- Study population
- Sample size was calculated using Epi- Info7. Based on aortic dilatation is found in 84.6 in follow up CT [12] With a confidence limits 5% and a confidence level of 80% the minimum patients required for this study is 77 cases.
Key inclusion criteria (3 listed)
- All patients with TOF who either underwent or have not yet had surgical correction.
- All patients with Fallot-type DORV.
- Patients should have survived until discharge and have at least one echocardiography and CT with full data related to one or more anatomic subcomponents of the aortic root, either before surgery or during follow-up, regardless of specific duration post repair.
Key exclusion criteria (1 listed)
- Patients who have contraindication for conducting cardiac CT scan. For instance, dye sensitivity, pregnancy, CKD, in addition to patients who have factors that interfere with CT image quality as metallic objects within the chest (e.g. Pacemaker).
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 |
|---|---|---|
| CTMeasuring aortic root diameter by CT | Diagnostic test | Repaired TOF, Unrepaired TOF |
Primary outcome
Aortic root diameters
Time frame: Throughout the study duration, about 1 year
: Aortic root diameters at four levels: 1. aortic annulus (AA) 2. sinus of Valsalva (SoV) 3. sinotubular junction (STJ) 4. ascending aorta (AAo). AA will be measured as the inter-commissural distance in the aortic valve, SoV will be measured at the level of maximal diameter on the axial image, STJ will be measured at the level of transitional zone from STJ to AAo, and AAo will be measured at the level of the main pulmonary artery bifurcation. Aortic cross-sectional area will be calculated by π×(diameter/2)2 The largest diameters of each aortic structure as measured based on the chest CT will be re-calculated as z-scores. In our study, "significant dilatation of the aortic structures" is defined as 95% confidence interval (z-score≥2) in diameter of each aortic structures. Echocardiography will be performed to check other cardiac deformities, including AR.
2 secondary outcomes
Aortic valve repair or surgical or transcatheter aortic valve replacement
Time frame: Throughout the study duration, about 1 year
Severity of AR at latest follow-up or before the earliest aortic valve or root intervention.
Time frame: Throughout the study duration, about 1 year
Results and safety
Results are not available in the source record.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 13 Oct 2023.
- Background: PubMed 36522807Expert Consensus Panel:; Miller JR, Stephens EH, Goldstone AB, Glatz AC, Kane L, Van Arsdell GS, Stellin G, Barron DJ, d'Udekem Y, Benson L, Quintessenza J, Ohye RG, Talwar S, Fremes SE, Emani SM, Eghtesady P. The American Association for Thoracic Surgery (AATS) 2022 Expert Consensus Document: Management of infants and neonates with tetralogy of Fallot. J Thorac Cardiovasc Surg. 2023 Jan;165(1):221-250. doi: 10.1016/j.jtcvs.2022.07.025. Epub 2022 Oct 26.
- Background: PubMed 33632484Goldstein BH, Petit CJ, Qureshi AM, McCracken CE, Kelleman MS, Nicholson GT, Law MA, Meadows JJ, Zampi JD, Shahanavaz S, Mascio CE, Chai PJ, Romano JC, Batlivala SP, Maskatia SA, Asztalos IB, Kamsheh AM, Healan SJ, Smith JD, Ligon RA, Pettus JA, Juma S, Raulston JEB, Hock KM, Pajk AL, Eilers LF, Khan HQ, Merritt TC, Canter M, Juergensen S, Rinderknecht FA, Bauser-Heaton H, Glatz AC. Comparison of Management Strategies for Neonates With Symptomatic Tetralogy of Fallot. J Am Coll Cardiol. 2021 Mar 2;77(8):1093-1106. doi: 10.1016/j.jacc.2020.12.048.
- Background: PubMed 12221055Niwa K, Siu SC, Webb GD, Gatzoulis MA. Progressive aortic root dilatation in adults late after repair of tetralogy of Fallot. Circulation. 2002 Sep 10;106(11):1374-8. doi: 10.1161/01.cir.0000028462.88597.ad.
- Background: PubMed 23224208Mongeon FP, Gurvitz MZ, Broberg CS, Aboulhosn J, Opotowsky AR, Kay JD, Valente AM, Earing MG, Lui GK, Fernandes SM, Gersony DR, Cook SC, Ting JG, Nickolaus MJ, Landzberg MJ, Khairy P; Alliance for Adult Research in Congenital Cardiology (AARCC). Aortic root dilatation in adults with surgically repaired tetralogy of fallot: a multicenter cross-sectional study. Circulation. 2013 Jan 15;127(2):172-9. doi: 10.1161/CIRCULATIONAHA.112.129585. Epub 2012 Dec 6.
- Background: PubMed 16516599Chong WY, Wong WH, Chiu CS, Cheung YF. Aortic root dilation and aortic elastic properties in children after repair of tetralogy of Fallot. Am J Cardiol. 2006 Mar 15;97(6):905-9. doi: 10.1016/j.amjcard.2005.09.141. Epub 2006 Feb 3.
- Background: PubMed 16080967Niwa K. Aortic root dilatation in tetralogy of Fallot long-term after repair--histology of the aorta in tetralogy of Fallot: evidence of intrinsic aortopathy. Int J Cardiol. 2005 Aug 18;103(2):117-9. doi: 10.1016/j.ijcard.2004.07.002.
- Background: PubMed 15860407Rathi VK, Doyle M, Williams RB, Yamrozik J, Shannon RP, Biederman RW. Massive aortic aneurysm and dissection in repaired tetralogy of Fallot; diagnosis by cardiovascular magnetic resonance imaging. Int J Cardiol. 2005 May 11;101(1):169-70. doi: 10.1016/j.ijcard.2004.05.037. No abstract available.
- Background: PubMed 20674941Konstantinov IE, Fricke TA, d'Udekem Y, Robertson T. Aortic dissection and rupture in adolescents after tetralogy of Fallot repair. J Thorac Cardiovasc Surg. 2010 Nov;140(5):e71-3. doi: 10.1016/j.jtcvs.2010.06.045. Epub 2010 Aug 1. No abstract available.
- Background: PubMed 16682313Colan SD, McElhinney DB, Crawford EC, Keane JF, Lock JE. Validation and re-evaluation of a discriminant model predicting anatomic suitability for biventricular repair in neonates with aortic stenosis. J Am Coll Cardiol. 2006 May 2;47(9):1858-65. doi: 10.1016/j.jacc.2006.02.020. Epub 2006 Apr 17.
- Background: PubMed 20211339Gautier M, Detaint D, Fermanian C, Aegerter P, Delorme G, Arnoult F, Milleron O, Raoux F, Stheneur C, Boileau C, Vahanian A, Jondeau G. Nomograms for aortic root diameters in children using two-dimensional echocardiography. Am J Cardiol. 2010 Mar 15;105(6):888-94. doi: 10.1016/j.amjcard.2009.11.040.
- Background: PubMed 34830578Mohammed AFA, Frick M, Kerst G, Hatam N, Elgamal MF, Essa KM, Hovels-Gurich HH, Vazquez-Jimenez JF, Zayat R. Proximal Aortic Dilatation and Pulmonary Valve Replacement in Patients with Repaired Tetralogy of Fallot: Is There a Relationship? A Cardiac Magnetic Resonance Imaging Study. J Clin Med. 2021 Nov 15;10(22):5296. doi: 10.3390/jcm10225296.
- Background: PubMed 37405457Kim W, Kwak JG, Cho S, Kim WH. Ten-year follow-up of dilatation of aortic structures in Fallot-type anomalies. Pediatr Cardiol. 2023 Oct;44(7):1552-1559. doi: 10.1007/s00246-023-03225-7. Epub 2023 Jul 5.
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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.
Amr Elbadry, MD study chair
Assiut University, Faculty of Medicine
Questions about this trial
What is this clinical trial studying?
An observational study of Congenital Heart Disease and Aortic Root Dilatation, run by Assiut University.
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 3 inclusion and 1 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 13 Oct 2023. Status can change between updates, so confirm with the study contact before making plans.
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 Abdelrahman أ Ramadan, MBBCH (+201011808028, abdelrahman.ramadan@aun.edu.eg), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Aortic root diameters (time frame: Throughout the study duration, about 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 NCT06081855, 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 13 Oct 2023.