Comparing Cardiac CT and TEE for Watchman FLX Device

This study is comparing two ways to check on your Watchman FLX device after it's been implanted: Transesophageal echocardiography (TEE) and Cardiac Computed Tomography Angiography (Cardiac CTA). TEE is a standard ultrasound where a probe goes down your throat, while Cardiac CTA uses X-rays and a special dye. The study wants to see how well each method finds leaks around or through your device. You can join if you are over 18, are planning to have a left atrial appendage closure (LAAC) procedure, and have healthy kidney function (eGFR of 30 mL/min or higher). The study aims to determine which method is better at detecting these leaks three months after your procedure. The current recruitment status is unclear.

Study design
This is an interventional study planning to enroll 320 participants. It directly compares two imaging procedures: Transesophageal echocardiography (TEE) and Cardiac CTA.
What's involved
You would undergo both a TEE and a Cardiac CTA on the same day, 90 days after your LAAC procedure.
Compensation
Not stated in the trial record.
Follow-up
You will be followed for at least 3 months after your LAAC procedure for the primary endpoints.

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NCT06523166

Direct Comparison of Cardiac CT With TEE to Evaluate Watchman FLX LAA Occluder Device Characteristics

Recruiting
NAAges 18+InterventionalDiagnostic
University Hospitals Cleveland Medical Center
~320 participants
Updated 2026-04-07 on ClinicalTrials.gov
What's tested:Transesophageal echocardiography (TEE)Cardiac CTA

At a glance

Recruiting sites
1 of 5 listed sites are recruiting right now
RecruitingSuspended, closed, or not yet open
What they're measuring
LAA patency percentage associated with peri device leak (PDL) as measured by CT scan/TEE
Measured over 3 months post procedure
+3 more outcomes measured
Device Related Thrombosis
Peri-device Leak

NCT06523166

Where you'd take part

This study runs at 5 sites. They're the same protocol — you choose where, and that choice sets who your contact draft is addressed to.

  • Cedars Sinai

    Los Angeles, Californiastudy coordinator listed

    Not yet recruiting

  • Ohio State University Medical Center

    Columbus, Ohiostudy coordinator listed

    Not yet recruiting

  • Sanger Heart & Vascular Institute- Atrium Health

    Charlotte, North Carolinastudy coordinator listed

    Recruiting

  • St. Francis Hospital and Catholic Health

    Roslyn, New Yorkstudy coordinator listed

    Not yet recruiting

  • University Hospitals Cleveland Medical Center

    Cleveland, Ohiostudy coordinator listed

    Not yet recruiting

Sites open and close at different times, so the status above is per site — it can differ from the study's overall status.

  • Steven Filby, MD · PRINCIPAL_INVESTIGATOR · University Hospitals Cleveland Medical Center

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Eligibility criteria

Inclusion

Subjects \>18 years old planned to undergo LAAC
eGFR ≥ 30 mL/min per 1.73 m2

Exclusion

Subjects below the age of 18
non-English speaking subjects
eGFR \< 30 mL/min per 1.73 m2
Subjects with history of contrast allergy
Pregnant women
  • LAA patency percentage associated with peri device leak (PDL) as measured by CT scan/TEE3 months post procedure
  • LAA patency percentage associated with intra device leak (IDL) as measured by CT scan/TEE.3 months post procedure
  • LAA patency percentage associated with a combination of both PDL and IDL as measured by CT scan/TEE.3 months post procedure
  • Number of detected device-related thrombus (DRT) as measured by CT scan/TEE.3 months