An interventional study of M-TEER in Iatrogenic ASD and Mitral Regurgitation, sponsored by Hippocration General Hospital. Active, not recruiting at 1 site in Greece. Open to participants aged 40 Years to 90 Years. Per ClinicalTrials.gov, last updated 2026-09-01.
Sponsored by Hippocration General Hospital · Not applicable, Interventional, and Diagnostic
Transcatheter mitral edge-to-edge repair (M-TEER) has become an established minimally invasive therapy for patients with severe mitral regurgitation (MR) who are at high or prohibitive surgical risk. However, accurate quantification of residual MR after M-TEER remains challenging. In this direction, the hemodynamic significance of the post-procedural iatrogenic atrial septal defect (iASD) gradient is unknown. The objective of this study is to assess the relationship between the post-procedural iASD pressure gradient and the severity of residual MR with intraprocedural echocardiographic and hemodynamic parameters.
The present study plans to enroll patients with high or prohibitive surgical risk and moderate-to-severe or severe symptomatic MR, despite the administration of maximally tolerated doses of guideline-directed medical therapy and, if appropriate, cardiac resynchronization therapy. Patients with severe tricuspid regurgitation, post-procedural transmitral gradient >5 mmHg, right-to-left shunt requiring iASD closure, or refusal to provide written informed consent will be excluded. All intraoperative transesophageal echo loops will be acquired using an EPIQ ultrasound system (Philips, Eindhoven, Netherlands) with an X8-2t transesophageal probe. At the end of the procedure, in the mid-esophageal aortic valve short-axis view, flow across the iASD will be assessed immediately after catheter withdrawal from the left atrium using continuous-wave Doppler interrogation. Through a cardiac cycle, the mean pressure gradient between the left and right atria will be calculated while maintaining hemodynamic stability. Digitally stored image loops will be analyzed offline. Blinded analysis will be performed by an independent investigator. For assessment of residual MR, multiplanar reconstruction will be used, and the largest systolic 3D-VCA will be measured. When multiple regurgitant jets are present, the total regurgitant orifice area will be calculated as the sum of the individual 3D-VCAs. The primary endpoint is to determine the association and diagnostic performance of the post-procedural mean left-to-right iASD pressure gradient, measured immediately after catheter withdrawal, for identifying moderate-or-greater residual mitral regurgitation after M-TEER, as assessed by blinded offline 3D-VCA analysis.
468 studies on the registry are indexed under Mitral Valve Insufficiency; 164 are open to participants now.
This study's planned enrollment of 100 is above the median of 68 across 279 interventional studies indexed under Mitral Valve Insufficiency.
Browse Mitral Valve Insufficiency studies →Hippocration General Hospital is the lead sponsor of 27 studies on the registry; 6 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
high- or prohibitive-surgical-risk patients with severe mitral regurgitation
Procedure: M-TEER
Hemodynamic and echocardiographic assessment of M-TEER procedural success
post-procedural mean left-to-right iASD pressure gradient, measured immediately after catheter withdrawal, for identifying moderate-or-greater residual mitral regurgitation after M-TEER
Time frame: The iASD gradient, echocardiographic and hemodynamic markers of procedural success will be assessed immediately after catheter withdrawal at the end of the M-TEER procedure.
the cut-off point of iASD gradient for identifying mild or trivial mitral regurgitation after M-TEER procedure
To determine the cut-off point of the post-procedural iASD gradient for identifying mild or trivial residual mitral regurgitation after M-TEER procedure
Time frame: 4 years
Plan to share: Undecided
This study is active, not recruiting, as verified in Aug 2026. You cannot join it, but the record below documents what was studied.
Get an email when the registry record changes — status, dates, results — or when someone posts here.
Sign in to followQuestions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.
Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.
Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.
Hippocration General Hospital