NCT03616028Active, not recruiting
The CONFORMAL Early Feasibility Study
The CONFORMAL Early Feasibility Study An Evaluation of the Safety and Performance of the Conformal Left Atrial Appendage Seal for Left Atrial Appendage Occlusion
Source: ClinicalTrials.gov · Last updated 13 Feb 2026
Brief summary (registry, in English)
An evaluation of the safety and performance of the Conformal Left Atrial Appendage Seal for Left Atrial Appendage Occlusion
- Status (registry)
- Active, not recruiting
- Study type
- Interventional
- Enrollment
- 64 (actual)
- First submitted
- 30 Jul 2018
- Start date
- 22 Feb 2019
- Primary completion date
- 27 May 2022
- Lead sponsor
- Conformal Medical, Inc
- Diseases
- Atrial fibrillation
- NCT number
- NCT03616028
What you commit to
- Study type: Interventional
- Participants enrolled: 64
- From 22 Feb 2019 to the primary completion date, 27 May 2022
- 11 sites in 1 country
- Visits and tests: ask the trial team, the registry does not list them
Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.
Who cannot take part
Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.
Who the study is looking for
- Male or non-pregnant female aged ≥18 years
- Documented non-valvular AF (paroxysmal, persistent, or permanent)
- High risk of stroke or systemic embolism, defined as CHA2DS2-VASc score of ≥ 2 for men and ≥ 3 for women
- The patient is recommended for oral anticoagulation therapy (OAC), but has an appropriate rationale to seek a non-pharmacologic alternative to chronic oral anticoagulation
- The patient deemed appropriate for LAA closure by the Site P.I. and a non-interventional physician using an evidenced-based decision-making tool on oral anticoagulants consistent with standard of care.
- The patient is willing and able to comply with the protocol-specified medication regimen and follow-up evaluations
- The patient (or legally authorized representative, (where allowed)) has been informed of the nature of the study, agrees to its provisions, and has provided written informed consent approved by the appropriate Institutional Review Board (IRB) or Ethics Committee (EC)
- General Exclusion Criteria
- Pregnant or nursing patients and those who plan pregnancy in the period up to 1 year following the index procedure. Female patients of childbearing potential must have a negative pregnancy test (per site standard test) within 7 days prior to index procedure.
- Anatomic conditions that would prevent performance of an LAA occlusion procedure (e.g., prior atrial septal defect \[ASD\] or patient foramen ovale \[PFO\] surgical repair or implanted closure device, or obliterated or ligated left atrial appendage)
- Atrial fibrillation that is defined by a single occurrence or that is transient or reversible (e.g., secondary thyroid disorders, acute alcohol intoxication, trauma, recent major surgical procedures)
- Patients with a medical condition (other than atrial fibrillation) that mandates chronic oral anticoagulation (e.g., history of unprovoked deep vein thrombosis or pulmonary embolism, or mechanical heart valve)
- History of bleeding diathesis or coagulopathy, or patients in whom antiplatelet and/or anticoagulant therapy is contraindicated
- Active infection with bacteremia
- Documented symptomatic carotid artery disease (\>50% diameter stenosis with prior ipsilateral stroke or TIA) or known asymptomatic carotid artery disease (diameter stenosis of \>70%)
- Recent (within 30 days pre-procedure) or planned (within 60 days post-procedure) cardiac or non-cardiac interventional or surgical procedure
- Recent (within 90 days pre-procedure) stroke or transient ischemic attack.
- Recent (within 60 days pre-procedure) myocardial infarction
- Vascular access precluding delivery of implant with catheter-based system
- Severe heart failure (New York Heart Association Class III or IV)
- Prior cardiac transplant, history of mitral valve replacement or transcatheter mitral valve intervention, or any mechanical valve implant
- Renal insufficiency, defined as estimated glomerular filtration rate (eGFR) \<30 mL/min/1.73 m2 (by the Modification of Diet in Renal Disease equation), or dialysis at the time of screening
- Platelet count \<75,000 cells/mm3 or \>700,000 cells/mm3, or white blood cell count \<3,000 cells/mm3
- Patient has a known allergy, hypersensitivity or contraindication to aspirin, heparin, or device materials (e.g., nickel, titanium, gold) or that would preclude any P2Y12 inhibitor therapy, or the patient has contrast sensitivity that cannot be adequately pre-medicated
- Current participation in another investigational drug or device study
- Patient is a prisoner
- Patient is unable to undergo general anesthesia
- Known other medical illness or known history of substance abuse that may cause non-compliance with the protocol or protocol-specified medication regimen, confound the data interpretation, or is associated with a life expectancy of less than 2 years
- Patient has a condition which precludes adequate transesophageal echocardiographic (TEE) assessment
- Echocardiographic Exclusion Criteria
- Left atrial appendage anatomy cannot accommodate the CLAAS device per manufacturer IFU
- Intracardiac thrombus or dense spontaneous echo contrast, as visualized by TEE within 2 days prior to implant
- Left ventricular ejection fraction (LVEF) \<30%
- Circumferential pericardial effusion \>10 mm or symptomatic pericardial effusion, signs or symptoms of acute or chronic pericarditis, or evidence of tamponade physiology
- Atrial septal defect that warrants closure
- High risk patent foramen ovale (PFO), defined as an atrial septal aneurysm (exclusion \>15 mm or length \> 15 mm) or large shunt (early \[within 3 beats\] or substantial passage of bubbles)
- Moderate or severe mitral valve stenosis (mitral valve area \<1.5 cm2)
- Complex atheroma with mobile plaque of the aorta
- Patient has evidence of cardiac tumor
Age in the registry: 18 years to - · Sex: All · Accepts healthy volunteers
Sites (11)
Sites in registry order. Pick your city on the disease page to sort them by distance.
| Site | City | Country | Site status |
|---|---|---|---|
| Texas Cardiac Arrhythmia Institute Coordinator of this site? Confirm its status | Austin | United States | Unknown status |
| Erlanger Health System Coordinator of this site? Confirm its status | Chattanooga | United States | Unknown status |
| The Christ Hospital Coordinator of this site? Confirm its status | Cincinnati | United States | Unknown status |
| St. Bernards Medical Center Coordinator of this site? Confirm its status | Jonesboro | United States | Unknown status |
| Catholic Medical Center Coordinator of this site? Confirm its status | Manchester | United States | Unknown status |
| Vanderbilt University Medical Center Coordinator of this site? Confirm its status | Nashville | United States | Unknown status |
| Columbia University Medical Center/NYPH Coordinator of this site? Confirm its status | New York | United States | Unknown status |
| Mount Sinai Coordinator of this site? Confirm its status | New York | United States | Unknown status |
| Baylor Scott & White Research Institute Coordinator of this site? Confirm its status | Plano | United States | Unknown status |
| Pacific Heart Institute Coordinator of this site? Confirm its status | Santa Monica | United States | Unknown status |
| Lankenau Heart Institute Coordinator of this site? Confirm its status | Wynnewood | United States | Unknown status |
This page is information, not medical advice. Discuss any trial with your doctor.