Aortic Valve StenosisNCT01835028
Multicenter Prospective Study of Low-Flow Low-Gradient Aortic Stenosis (TOPAS Study)
An observational study of Aortic Valve Stenosis, run by Laval University at 11 sites in 6 countries.
Trial summary
Low-flow, low-gradient (LF-LG) aortic stenosis (AS) may occur with depressed (i.e. Classical LF; CLF) or preserved (i.e. Paradoxical LF; PLF) LV ejection fraction (LVEF) and both situations are amongst the most challenging encountered in patients with valvular heart disease. Read more about this study
- Who is it for?
- Ages 21 to 90 years
- Conditions the study is for
- Aortic Valve Stenosis
- What is being tested?
- Echocardiography, Computed tomography and Magnetic resonance imaging
- How many people
- 320 participants
- Where
- 11 sitesin 6 countries
- Study dates
- Jun 2002to Jan 2024
- 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 21 to 90 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Study population: patients with moderate to severe aortic stenosis and Low Fow Low Gradiwnt , with Low and preserved Ejection Fraction wil be selected at primary care clinic
Who may be able to join
- LVEF≤ 40%
- Indexed aortic valve area (AVA) ≤ 0.6 cm²/m²
- Mean transvalvular gradient < 40 mmHg
Who cannot join
- Pregnant or lactating women
- advanced renal failure
- tumor with metastasis
Trial locations and contacts
11 sites in 6 countries.
11 sites in 6 countries
Canada3 sites, 3 recruiting
- Recruiting
Ottawa Heart Institute University
Ottawa, Ontario
Ian Burwash, iburwash@ottawaheart.ca
- Recruiting
Institut Universitaire de Cardiologie et de Pneumologie de Québec
Québec, G1V4G5
Philippe Pibarot, DVM, PHD, 418-656-8711 ext. 5938, Philippe.Pibarot@med.ulaval.ca
Abdellaziz Dahou, MD, 418-656-8711 ext. 3239, abdellaziz.dahou@criucpq.ulaval.ca
- Recruiting
St Paul's Hospital, Vancouver
Vancouver
Jonathon Leipsic, JLeipsic@providencehealth.bc.ca
France3 sites, 3 recruiting
- Not yet recruiting
Hôpital La Timone
Marseille
Gilbert Habib, gilbert.habib@free.fr
- Not yet recruiting
Hôpital Bichat
Paris
David Messika-Zeitoun, david.messika-zeitoun@bch.aphp.fr
- Not yet recruiting
CHU, Rennes
Rennes
Erwan Donal, Erwan.DONAL@chu-rennes.fr
United States2 sites, 2 recruiting
- Not yet recruiting
Pittsburgh Medical Center
Pittsburgh, Pennsylvania
Joao Cavalcante, cavalcantejl@upmc.edu
- Not yet recruiting
Mayo Clinic
Rochester, Minnesota
Maurice Sarano, sarano.maurice@mayo.edu
Austria1 site, 1 recruiting
- Recruiting
Viena General Hospital
Vienna
Gerald Mundigler, gerald.mundigler@meduniwien.ac.at
Belgium1 site, 1 recruiting
- Not yet recruiting
CHU Start Tilman
Liège
Patrizio Lancellotti, plancellotti@chu.ulg.ac.be
Germany1 site, 1 recruiting
- Recruiting
University Hospital
Münster
Helmut Baumgartner, helmut.baumgartner@ukmuenster.de
About this study
Official title: Multicenter Prospective Study of Low-Flow Low-Gradient Aortic Stenosis (TOPAS Study Phase III)
Low-flow, low-gradient (LF-LG) aortic stenosis (AS) may occur with depressed (i.e. Classical LF; CLF) or preserved (i.e. Paradoxical LF; PLF) LV ejection fraction (LVEF) and both situations are amongst the most challenging encountered in patients with valvular heart disease. Although, CLF-LG AS is recognized has an important clinical entity, current ACC/AHA-ESC guidelines however do not provide precise recommendations for clinical management of these patients . PLF-LG AS is a new entity recently described by our group, which is characterized by more pronounced LV concentric remodeling with smaller LV cavity size and a restrictive physiology leading to impaired LV filling, altered myocardial function, and a low-flow state. Up to recently, this entity was often misdiagnosed, leading to underestimation of AS severity and inappropriate delays for aortic valve replacement surgery (SAVR). The two main challenges in patients with CLF- or PLF- LG AS are to distinguish between a true-severe (TS) versus a pseudo-severe (PS) stenosis and to accurately quantify the extent of myocardial impairment. Unfortunately, the traditional resting and stress echocardiographic parameters currently used to assess the severity of valvular and myocardial dysfunction in patients with LF-LG AS are far from being optimal, and as a consequence, quantification of disease severity and therapeutic management may not be appropriate in a substantial proportion of these patients.
THE GENERAL OBJECTIVES of the TOPAS study are to develop and validate new parameters and biomarkers to improve the assessment of stenosis severity and myocardial impairment, the risk-stratification, and the clinical decision making in patients with LF-LG AS and to assess the impact of the different therapeutic strategies on patient outcomes.
Read the detailed description
Low-flow, low-gradient (LF-LG) aortic stenosis (AS) may occur with depressed (i.e. Classical LF; CLF) or preserved (i.e. Paradoxical LF; PLF) LV ejection fraction (LVEF) and both situations are amongst the most challenging encountered in patients with valvular heart disease. Although, CLF-LG AS is recognized has an important clinical entity, current ACC/AHA-ESC guidelines however do not provide precise recommendations for clinical management of these patients because there is an important lack of data on this condition. PLF-LG AS is a new entity recently described by our group, which is characterized by more pronounced LV concentric remodeling with smaller LV cavity size and a restrictive physiology leading to impaired LV filling, altered myocardial function, and a low-flow state. Up to recently, this entity was often misdiagnosed, leading to underestimation of AS severity and inappropriate delays for aortic valve replacement surgery (SAVR). The two main challenges in patients with CLF- or PLF- LG AS are to distinguish between a true-severe (TS) versus a pseudo-severe (PS) stenosis and to accurately quantify the extent of myocardial impairment. Unfortunately, the traditional resting and stress echocardiographic parameters currently used to assess the severity of valvular and myocardial dysfunction in patients with LF-LG AS are far from being optimal, and as a consequence, quantification of disease severity and therapeutic management may not be appropriate in a substantial proportion of these patients. Furthermore, it remains uncertain which is the optimal timing and mode of treatment (SAVR vs. Transcatheter Aortic Valve Implantation [TAVI] vs. Medical) for the different subsets of patients with LF-LG AS patients (CLF- vs. PLF- LG AS; TS vs. PS AS; absence vs. presence of myocardial contractile reserve etc.) THE GENERAL OBJECTIVES of the TOPAS study are to develop and validate new parameters and biomarkers to improve the assessment of stenosis severity and myocardial impairment, the risk-stratification, and the clinical decision making in patients with LF-LG AS and to assess the impact of the different therapeutic strategies on patient outcomes.
THE SPECIFIC AIMS of the phase III of the TOPAS study are: (1) To obtain and analyze the parameters of stenosis severity and LV functional impairment measured by stress echocardiography (SE), the degree of valvular calcification measured by multidetector computed tomography (CT), the extent of myocardial fibrosis measured by magnetic resonance imaging (MRI), the blood levels of natriuretic peptides and markers of extracellular matrix (ECM) turn-over, and the occurrence of clinical events in a series of 310 patients with CLF-LG AS (210 in TOPAS- I and II + 100 in TOPAS-III) and in a series of 380 patients with PLF-LG AS (80 in TOPAS II + 300 in TOPAS-III). (2) To measure the weight and calcification of the valves explanted from the patients who will undergo SAVR during follow-up in order to corroborate the actual severity of the stenosis. (3) To assess the usefulness of: i) the projected aortic valve area measured by SE to separate TS from PS AS and predict outcomes in PLF-LG AS; ii) the amount of valvular calcium measured by CT to separate TS from PS AS and predict outcomes in CLF- and PLF- LG AS; iii) the myocardial contractile reserve measured by SE, the extent of myocardial fibrosis measured by MRI, and the plasma levels of BNP and ECM biomarkers to predict operative (SAVR) / procedural (TAVI) risk as well as hemodynamic (LV function), functional (DASI and 6-min walk test distance), and clinical (morbidity-mortality) outcomes in CLF- and PLF- LG AS. (4) To compare the different modes of treatment (SAVR, TAVI, Medical), with respect to hemodynamic, functional, and clinical outcomes.
RELEVANCE OF THE STUDY: There have been very few prospective studies performed until now in patients with LF-LG AS and these studies have included a relatively small number of patients, have often used only one imaging modality (Doppler-echo) and a limited number of biomarkers, and they have generally not included the patients with PLF-LG AS. Our prospective study is the first of its kind, as it will use a complementary multimodality imaging approach and it will measure prospectively conventional parameters of disease severity as well as new emerging parameters and biomarkers developed by our team in large prospective series of patients with CLF- and PLF- LG AS. This study shall contribute to improve the diagnostic evaluation and clinical conduct in patients with LF-LG AS. This new knowledge will lead to the establishment of clinical guidelines for the management of these high-risk patients.
- Conditions
- Aortic Valve Stenosis
- Being tested
- Echocardiography, Computed tomography, Magnetic resonance imaging, Blood biomarkers, Stress echocardiography
- Keywords
- Aortic Stenosis, Low Flow, Low Gradient, Left Ventricle, Echocardiography, Doppler
- Medical subject headings
- Aortic Valve Stenosis
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
EchocardiographyOther
Observational Study using Imaging and Biomarkers
Computed tomographyOther
Observational Study using Imaging and Biomarkers
Magnetic resonance imagingOther
Observational Study using Imaging and Biomarkers
Blood biomarkersOther
Observational Study using Imaging and Biomarkers
Stress echocardiographyOther
Observational Study using Imaging and Biomarkers
| Study group | Role | What they receive |
|---|---|---|
| Classical Low-Flow, Low-Gradient AS | Observational study in patients with Classical Low-Flow, Low-Gradient Aortic Stenosis and Low LV Ejection Fraction undergoing surgical aortic valve replacement, transcatheter aortic valve replacement, or conservative management:
I- Baseline visit: Medical history, physical / functional evaluation, blood biomarkers, resting echocardiography, stress echocardiography, aortic valve calcium scoring by computed tomography, myocardial fibrosis by magnetic resonance imaging II- Follow-up: clinical outcomes, physical / functional evaluation, echocardiography, blood biomarkers Receives: Other: Echocardiography; Other: Computed tomography; Other: Magnetic resonance imaging; Other: Blood biomarkers; Other: Stress echocardiography | |
| Paradoxical Low-Flow, Low-Gradient AS | Observational study in patients with Paradoxical Low-Flow, Low-Gradient Aortic Stenosis and Preserved LV Ejection Fraction undergoing surgical aortic valve replacement, transcatheter aortic valve replacement, or conservative management:
I- Baseline visit: Medical history, physical / functional evaluation, blood biomarkers, resting echocardiography, stress echocardiography, aortic valve calcium scoring by computed tomography, myocardial fibrosis by magnetic resonance imaging II- Follow-up: clinical outcomes, physical / functional evaluation, echocardiography, blood biomarkers Receives: Other: Echocardiography; Other: Computed tomography; Other: Magnetic resonance imaging; Other: Blood biomarkers; Other: Stress echocardiography |
What is being measured
The primary outcome is the main question the study is designed to answer.
all-cause mortality
Measured: Patients will be followed for 5 years, with an average of 3.5 years
Secondary outcomes (4)
30-day mortality (for patients treated by SAVR or TAVR)
Measured: Patients will be followed for 5 years, with an average of 3.5 years
cardiovascular mortality
Measured: Patients will be followed for 5 years, with an average of 3.5 years
new major cardiovascular events as defined by VARC: myocardial infarction, stroke, vascular complications, and re-hospitalization for heart failure composite end-point of cardiovascular mortality and hospitalization for heart failure
Measured: Patients will be followed for 5 years, with an average of 3.5 years
composite end-point of cardiovascular mortality and hospitalization for heart failure
Measured: Patients will be followed for 5 years, with an average of 3.5 years
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted18 Apr 2013 (estimated)
- Study startJun 2002
- Primary completionJan 2024 (estimated)
- Study completionJan 2024 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (41)Papers the sponsor has linked to this study.
- Other trials for Aortic Valve StenosisStudies of the same condition, open and under way.
- 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
- Prospective
- Enrolment
- 320 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Laval University
- Sponsor type
- University, hospital or other
- Collaborators
- University Hospital, Brest
- Responsible party
- Principal investigator, Philippe Pibarot, Laval University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01835028
- Sponsor's protocol ID
- MOP-57745
- Status last verified
- Sep 2021
- First submitted
- 16 Apr 2013
- Last updated
- 21 Sep 2021
- Results posted
- No
- Data monitoring committee
- No
Publications
Blais C, Dumesnil JG, Baillot R, Simard S, Doyle D, Pibarot P. Impact of valve prosthesis-patient mismatch on short-term mortality after aortic valve replacement. Circulation. 2003 Aug 26;108(8):983-8. doi: 10.1161/01.CIR.0000085167.67105.32. Epub 2003 Aug 11.
PubMed 12912812Mohty D, Dumesnil JG, Echahidi N, Mathieu P, Dagenais F, Voisine P, Pibarot P. Impact of prosthesis-patient mismatch on long-term survival after aortic valve replacement: influence of age, obesity, and left ventricular dysfunction. J Am Coll Cardiol. 2009 Jan 6;53(1):39-47. doi: 10.1016/j.jacc.2008.09.022.
PubMed 19118723Hachicha Z, Dumesnil JG, Bogaty P, Pibarot P. Paradoxical low-flow, low-gradient severe aortic stenosis despite preserved ejection fraction is associated with higher afterload and reduced survival. Circulation. 2007 Jun 5;115(22):2856-64. doi: 10.1161/CIRCULATIONAHA.106.668681. Epub 2007 May 28.
PubMed 17533183Hachicha Z, Dumesnil JG, Pibarot P. Usefulness of the valvuloarterial impedance to predict adverse outcome in asymptomatic aortic stenosis. J Am Coll Cardiol. 2009 Sep 8;54(11):1003-11. doi: 10.1016/j.jacc.2009.04.079.
PubMed 19729117Pibarot P, Dumesnil JG. Low-flow, low-gradient aortic stenosis with normal and depressed left ventricular ejection fraction. J Am Coll Cardiol. 2012 Nov 6;60(19):1845-53. doi: 10.1016/j.jacc.2012.06.051. Epub 2012 Oct 10.
PubMed 23062546Dumesnil JG, Pibarot P, Carabello B. Paradoxical low flow and/or low gradient severe aortic stenosis despite preserved left ventricular ejection fraction: implications for diagnosis and treatment. Eur Heart J. 2010 Feb;31(3):281-9. doi: 10.1093/eurheartj/ehp361. Epub 2009 Sep 8.
PubMed 19737801Dumesnil JG, Pibarot P. Evaluation of aortic stenosis severity: new challenges, new solutions. J Am Soc Echocardiogr. 2011 Sep;24(9):992-4. doi: 10.1016/j.echo.2011.07.011. No abstract available.
PubMed 21867870Pibarot P, Dumesnil JG. Assessment of aortic stenosis severity: when the gradient does not fit with the valve area. Heart. 2010 Sep;96(18):1431-3. doi: 10.1136/hrt.2010.195149. No abstract available.
PubMed 20813724Pibarot P, Dumesnil JG. Paradoxical low-flow, low-gradient aortic stenosis adding new pieces to the puzzle. J Am Coll Cardiol. 2011 Jul 19;58(4):413-5. doi: 10.1016/j.jacc.2011.01.057. No abstract available.
PubMed 21757119Pibarot P, Dumesnil JG. Improving assessment of aortic stenosis. J Am Coll Cardiol. 2012 Jul 17;60(3):169-80. doi: 10.1016/j.jacc.2011.11.078.
PubMed 22789881Picano E, Pibarot P, Lancellotti P, Monin JL, Bonow RO. The emerging role of exercise testing and stress echocardiography in valvular heart disease. J Am Coll Cardiol. 2009 Dec 8;54(24):2251-60. doi: 10.1016/j.jacc.2009.07.046.
PubMed 19958961Rodriguez-Gabella T, Nombela-Franco L, Auffret V, Asmarats L, Islas F, Maes F, Ferreira-Neto AN, Paradis JM, Dumont E, Cote M, Jimenez-Quevedo P, Macaya C, Pibarot P, Rodes-Cabau J. Transcatheter Aortic Valve Implantation in Patients With Paradoxical Low-Flow, Low-Gradient Aortic Stenosis. Am J Cardiol. 2018 Aug 15;122(4):625-632. doi: 10.1016/j.amjcard.2018.04.044. Epub 2018 May 17.
PubMed 30064863Annabi MS, Clisson M, Clavel MA, Pibarot P. Workup and Management of Patients With Paradoxical Low-Flow, Low-Gradient Aortic Stenosis. Curr Treat Options Cardiovasc Med. 2018 May 2;20(6):49. doi: 10.1007/s11936-018-0642-y.
PubMed 29721704Ribeiro HB, Lerakis S, Gilard M, Cavalcante JL, Makkar R, Herrmann HC, Windecker S, Enriquez-Sarano M, Cheema AN, Nombela-Franco L, Amat-Santos I, Munoz-Garcia AJ, Garcia Del Blanco B, Zajarias A, Lisko JC, Hayek S, Babaliaros V, Le Ven F, Gleason TG, Chakravarty T, Szeto WY, Clavel MA, de Agustin A, Serra V, Schindler JT, Dahou A, Puri R, Pelletier-Beaumont E, Cote M, Pibarot P, Rodes-Cabau J. Transcatheter Aortic Valve Replacement in Patients With Low-Flow, Low-Gradient Aortic Stenosis: The TOPAS-TAVI Registry. J Am Coll Cardiol. 2018 Mar 27;71(12):1297-1308. doi: 10.1016/j.jacc.2018.01.054.
PubMed 29566812Annabi MS, Touboul E, Dahou A, Burwash IG, Bergler-Klein J, Enriquez-Sarano M, Orwat S, Baumgartner H, Mascherbauer J, Mundigler G, Cavalcante JL, Larose E, Pibarot P, Clavel MA. Dobutamine Stress Echocardiography for Management of Low-Flow, Low-Gradient Aortic Stenosis. J Am Coll Cardiol. 2018 Feb 6;71(5):475-485. doi: 10.1016/j.jacc.2017.11.052.
PubMed 29406851
Study at a glance
From the registry record, last updated by the sponsor on 21 Sep 2021. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Multicenter Prospective Study of Low-Flow Low-Gradient Aortic Stenosis (TOPAS Study Phase III)
- ClinicalTrials.gov ID
- NCT01835028
- Acronym / sponsor ID
- MOP-57745
- Conditions
- Aortic Valve Stenosis
- Keywords
- Aortic Stenosis, Low Flow, Low Gradient, Left Ventricle, Echocardiography, Doppler
- Study type
- Observational
- Recruitment status
- Unknown status
- Enrolment
- 320 participants (estimated)
- Lead sponsor
- Laval UniversityUniversity, hospital or other
- Collaborators
- University Hospital, Brest
- Study start
- Jun 2002
- Primary completion
- Jan 2024 (estimated)
- Study completion
- Jan 2024 (estimated)
- First posted
- 18 Apr 2013 (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.
Low-flow, low-gradient (LF-LG) aortic stenosis (AS) may occur with depressed (i.e. Classical LF; CLF) or preserved (i.e. Paradoxical LF; PLF) LV ejection fraction (LVEF) and both situations are amongst the most challenging encountered in patients with valvular heart disease. Although, CLF-LG AS is recognized has an important clinical entity, current ACC/AHA-ESC guidelines however do not provide precise recommendations for clinical management of these patients . PLF-LG AS is a new entity recently described by our group, which is characterized by more pronounced LV concentric remodeling with smaller LV cavity size and a restrictive physiology leading to impaired LV filling, altered myocardial function, and a low-flow state. Up to recently, this entity was often misdiagnosed, leading to underestimation of AS severity and inappropriate delays for aortic valve replacement surgery (SAVR). The two main challenges in patients with CLF- or PLF- LG AS are to distinguish between a true-severe (TS) versus a pseudo-severe (PS) stenosis and to accurately quantify the extent of myocardial impairment. Unfortunately, the traditional resting and stress echocardiographic parameters currently used to assess the severity of valvular and myocardial dysfunction in patients with LF-LG AS are far from being optimal, and as a consequence, quantification of disease severity and therapeutic management may not be appropriate in a substantial proportion of these patients.
THE GENERAL OBJECTIVES of the TOPAS study are to develop and validate new parameters and biomarkers to improve the assessment of stenosis severity and myocardial impairment, the risk-stratification, and the clinical decision making in patients with LF-LG AS and to assess the impact of the different therapeutic strategies on patient outcomes.
Detailed description
Low-flow, low-gradient (LF-LG) aortic stenosis (AS) may occur with depressed (i.e. Classical LF; CLF) or preserved (i.e. Paradoxical LF; PLF) LV ejection fraction (LVEF) and both situations are amongst the most challenging encountered in patients with valvular heart disease. Although, CLF-LG AS is recognized has an important clinical entity, current ACC/AHA-ESC guidelines however do not provide precise recommendations for clinical management of these patients because there is an important lack of data on this condition. PLF-LG AS is a new entity recently described by our group, which is characterized by more pronounced LV concentric remodeling with smaller LV cavity size and a restrictive physiology leading to impaired LV filling, altered myocardial function, and a low-flow state. Up to recently, this entity was often misdiagnosed, leading to underestimation of AS severity and inappropriate delays for aortic valve replacement surgery (SAVR). The two main challenges in patients with CLF- or PLF- LG AS are to distinguish between a true-severe (TS) versus a pseudo-severe (PS) stenosis and to accurately quantify the extent of myocardial impairment. Unfortunately, the traditional resting and stress echocardiographic parameters currently used to assess the severity of valvular and myocardial dysfunction in patients with LF-LG AS are far from being optimal, and as a consequence, quantification of disease severity and therapeutic management may not be appropriate in a substantial proportion of these patients. Furthermore, it remains uncertain which is the optimal timing and mode of treatment (SAVR vs. Transcatheter Aortic Valve Implantation [TAVI] vs. Medical) for the different subsets of patients with LF-LG AS patients (CLF- vs. PLF- LG AS; TS vs. PS AS; absence vs. presence of myocardial contractile reserve etc.) THE GENERAL OBJECTIVES of the TOPAS study are to develop and validate new parameters and biomarkers to improve the assessment of stenosis severity and myocardial impairment, the risk-stratification, and the clinical decision making in patients with LF-LG AS and to assess the impact of the different therapeutic strategies on patient outcomes.
THE SPECIFIC AIMS of the phase III of the TOPAS study are: (1) To obtain and analyze the parameters of stenosis severity and LV functional impairment measured by stress echocardiography (SE), the degree of valvular calcification measured by multidetector computed tomography (CT), the extent of myocardial fibrosis measured by magnetic resonance imaging (MRI), the blood levels of natriuretic peptides and markers of extracellular matrix (ECM) turn-over, and the occurrence of clinical events in a series of 310 patients with CLF-LG AS (210 in TOPAS- I and II + 100 in TOPAS-III) and in a series of 380 patients with PLF-LG AS (80 in TOPAS II + 300 in TOPAS-III). (2) To measure the weight and calcification of the valves explanted from the patients who will undergo SAVR during follow-up in order to corroborate the actual severity of the stenosis. (3) To assess the usefulness of: i) the projected aortic valve area measured by SE to separate TS from PS AS and predict outcomes in PLF-LG AS; ii) the amount of valvular calcium measured by CT to separate TS from PS AS and predict outcomes in CLF- and PLF- LG AS; iii) the myocardial contractile reserve measured by SE, the extent of myocardial fibrosis measured by MRI, and the plasma levels of BNP and ECM biomarkers to predict operative (SAVR) / procedural (TAVI) risk as well as hemodynamic (LV function), functional (DASI and 6-min walk test distance), and clinical (morbidity-mortality) outcomes in CLF- and PLF- LG AS. (4) To compare the different modes of treatment (SAVR, TAVI, Medical), with respect to hemodynamic, functional, and clinical outcomes.
RELEVANCE OF THE STUDY: There have been very few prospective studies performed until now in patients with LF-LG AS and these studies have included a relatively small number of patients, have often used only one imaging modality (Doppler-echo) and a limited number of biomarkers, and they have generally not included the patients with PLF-LG AS. Our prospective study is the first of its kind, as it will use a complementary multimodality imaging approach and it will measure prospectively conventional parameters of disease severity as well as new emerging parameters and biomarkers developed by our team in large prospective series of patients with CLF- and PLF- LG AS. This study shall contribute to improve the diagnostic evaluation and clinical conduct in patients with LF-LG AS. This new knowledge will lead to the establishment of clinical guidelines for the management of these high-risk patients.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Classical Low-Flow, Low-Gradient AS | – | Other: Echocardiography, Other: Computed tomography, Other: Magnetic resonance imaging, Other: Blood biomarkers, Other: Stress echocardiographyObservational study in patients with Classical Low-Flow, Low-Gradient Aortic Stenosis and Low LV Ejection Fraction undergoing surgical aortic valve replacement, transcatheter aortic valve replacement, or conservative management: I- Baseline visit: Medical history, physical / functional evaluation, blood biomarkers, resting echocardiography, stress echocardiography, aortic valve calcium scoring by computed tomography, myocardial fibrosis by magnetic resonance imaging II- Follow-up: clinical outcomes, physical / functional evaluation, echocardiography, blood biomarkers |
| Paradoxical Low-Flow, Low-Gradient AS | – | Other: Echocardiography, Other: Computed tomography, Other: Magnetic resonance imaging, Other: Blood biomarkers, Other: Stress echocardiographyObservational study in patients with Paradoxical Low-Flow, Low-Gradient Aortic Stenosis and Preserved LV Ejection Fraction undergoing surgical aortic valve replacement, transcatheter aortic valve replacement, or conservative management: I- Baseline visit: Medical history, physical / functional evaluation, blood biomarkers, resting echocardiography, stress echocardiography, aortic valve calcium scoring by computed tomography, myocardial fibrosis by magnetic resonance imaging II- Follow-up: clinical outcomes, physical / functional evaluation, echocardiography, blood biomarkers |
Who may qualify
- Ages
- 21 to 90 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- patients with moderate to severe aortic stenosis and Low Fow Low Gradiwnt , with Low and preserved Ejection Fraction wil be selected at primary care clinic
Key inclusion criteria (3 listed)
- LVEF≤ 40%
- Indexed aortic valve area (AVA) ≤ 0.6 cm²/m²
- Mean transvalvular gradient < 40 mmHg
Key exclusion criteria (3 listed)
- Pregnant or lactating women
- advanced renal failure
- tumor with metastasis
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 |
|---|---|---|
| EchocardiographyObservational Study using Imaging and Biomarkers | Other | Classical Low-Flow, Low-Gradient AS, Paradoxical Low-Flow, Low-Gradient AS |
| Computed tomographyObservational Study using Imaging and Biomarkers | Other | Classical Low-Flow, Low-Gradient AS, Paradoxical Low-Flow, Low-Gradient AS |
| Magnetic resonance imagingObservational Study using Imaging and Biomarkers | Other | Classical Low-Flow, Low-Gradient AS, Paradoxical Low-Flow, Low-Gradient AS |
| Blood biomarkersObservational Study using Imaging and Biomarkers | Other | Classical Low-Flow, Low-Gradient AS, Paradoxical Low-Flow, Low-Gradient AS |
| Stress echocardiographyObservational Study using Imaging and Biomarkers | Other | Classical Low-Flow, Low-Gradient AS, Paradoxical Low-Flow, Low-Gradient AS |
Primary outcome
all-cause mortality
Time frame: Patients will be followed for 5 years, with an average of 3.5 years
4 secondary outcomes
30-day mortality (for patients treated by SAVR or TAVR)
Time frame: Patients will be followed for 5 years, with an average of 3.5 years
cardiovascular mortality
Time frame: Patients will be followed for 5 years, with an average of 3.5 years
new major cardiovascular events as defined by VARC: myocardial infarction, stroke, vascular complications, and re-hospitalization for heart failure composite end-point of cardiovascular mortality and hospitalization for heart failure
Time frame: Patients will be followed for 5 years, with an average of 3.5 years
composite end-point of cardiovascular mortality and hospitalization for heart failure
Time frame: Patients will be followed for 5 years, with an average of 3.5 years
Results and safety
Results are not available in the source record.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 21 Sep 2021.
- Background: PubMed 12912812Blais C, Dumesnil JG, Baillot R, Simard S, Doyle D, Pibarot P. Impact of valve prosthesis-patient mismatch on short-term mortality after aortic valve replacement. Circulation. 2003 Aug 26;108(8):983-8. doi: 10.1161/01.CIR.0000085167.67105.32. Epub 2003 Aug 11.
- Background: PubMed 19118723Mohty D, Dumesnil JG, Echahidi N, Mathieu P, Dagenais F, Voisine P, Pibarot P. Impact of prosthesis-patient mismatch on long-term survival after aortic valve replacement: influence of age, obesity, and left ventricular dysfunction. J Am Coll Cardiol. 2009 Jan 6;53(1):39-47. doi: 10.1016/j.jacc.2008.09.022.
- Background: PubMed 17533183Hachicha Z, Dumesnil JG, Bogaty P, Pibarot P. Paradoxical low-flow, low-gradient severe aortic stenosis despite preserved ejection fraction is associated with higher afterload and reduced survival. Circulation. 2007 Jun 5;115(22):2856-64. doi: 10.1161/CIRCULATIONAHA.106.668681. Epub 2007 May 28.
- Background: PubMed 19729117Hachicha Z, Dumesnil JG, Pibarot P. Usefulness of the valvuloarterial impedance to predict adverse outcome in asymptomatic aortic stenosis. J Am Coll Cardiol. 2009 Sep 8;54(11):1003-11. doi: 10.1016/j.jacc.2009.04.079.
- Background: PubMed 23062546Pibarot P, Dumesnil JG. Low-flow, low-gradient aortic stenosis with normal and depressed left ventricular ejection fraction. J Am Coll Cardiol. 2012 Nov 6;60(19):1845-53. doi: 10.1016/j.jacc.2012.06.051. Epub 2012 Oct 10.
- Background: PubMed 19737801Dumesnil JG, Pibarot P, Carabello B. Paradoxical low flow and/or low gradient severe aortic stenosis despite preserved left ventricular ejection fraction: implications for diagnosis and treatment. Eur Heart J. 2010 Feb;31(3):281-9. doi: 10.1093/eurheartj/ehp361. Epub 2009 Sep 8.
- Background: PubMed 21867870Dumesnil JG, Pibarot P. Evaluation of aortic stenosis severity: new challenges, new solutions. J Am Soc Echocardiogr. 2011 Sep;24(9):992-4. doi: 10.1016/j.echo.2011.07.011. No abstract available.
- Background: PubMed 20813724Pibarot P, Dumesnil JG. Assessment of aortic stenosis severity: when the gradient does not fit with the valve area. Heart. 2010 Sep;96(18):1431-3. doi: 10.1136/hrt.2010.195149. No abstract available.
- Background: PubMed 21757119Pibarot P, Dumesnil JG. Paradoxical low-flow, low-gradient aortic stenosis adding new pieces to the puzzle. J Am Coll Cardiol. 2011 Jul 19;58(4):413-5. doi: 10.1016/j.jacc.2011.01.057. No abstract available.
- Background: PubMed 22789881Pibarot P, Dumesnil JG. Improving assessment of aortic stenosis. J Am Coll Cardiol. 2012 Jul 17;60(3):169-80. doi: 10.1016/j.jacc.2011.11.078.
- Background: PubMed 19958961Picano E, Pibarot P, Lancellotti P, Monin JL, Bonow RO. The emerging role of exercise testing and stress echocardiography in valvular heart disease. J Am Coll Cardiol. 2009 Dec 8;54(24):2251-60. doi: 10.1016/j.jacc.2009.07.046.
- Background: PubMed 30064863Rodriguez-Gabella T, Nombela-Franco L, Auffret V, Asmarats L, Islas F, Maes F, Ferreira-Neto AN, Paradis JM, Dumont E, Cote M, Jimenez-Quevedo P, Macaya C, Pibarot P, Rodes-Cabau J. Transcatheter Aortic Valve Implantation in Patients With Paradoxical Low-Flow, Low-Gradient Aortic Stenosis. Am J Cardiol. 2018 Aug 15;122(4):625-632. doi: 10.1016/j.amjcard.2018.04.044. Epub 2018 May 17.
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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.
11 sites in 6 countries: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Aortic Valve Stenosis, run by Laval University at 11 sites in 6 countries.
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 3 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 21 Sep 2021. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 11 sites in Canada, France, United States, Austria, Belgium and 1 more country. 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 Philippe Pibarot, DVM, PHD (418-656-8711 ext. 5938, Philippe.Pibarot@med.ulaval.ca), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
all-cause mortality (time frame: Patients will be followed for 5 years, with an average of 3.5 years). 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 NCT01835028, which also lists 41 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 21 Sep 2021.