Clinical trial NCT04494347: Watchman for Patients With Atrial Fibrillation Undergoing Transcatheter Mitral Valve Repair (WATCH-TMVR)
Official title: Watchman for Patients With Atrial Fibrillation Undergoing Transcatheter Mitral Valve Repair (WATCH-TMVR)
Study type: INTERVENTIONAL
Overall status: RECRUITING
Phase: NA
Conditions: Nonvalvular Atrial Fibrillation
Severe Degenerative Mitral Regurgitation
Lead sponsor: Mayo Clinic
Sponsor class: OTHER
First posted: 2020-07-31
Enrollment: 25
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Intervention model description: This is a prospective multicenter registry of 25 patients who are planned to undergo TMVr with MitraClip and also have an indication for LAAO with the commercially available WATCHMAN device. All patients will undergo TMVr first under general anesthesia and transesophageal echo (TEE) guidance. At the conclusion of the TMVr procedure, the patient will undergo LAAO with the Watchman device using the same transseptal access the was obtained to perform the TMVr. Patients will receive oral anticoagulation with warfarin (or a direct anticoagulant) and subsequent antiplatelet therapy as per standard of care and outlined in protocol for 6 weeks. After 6 weeks, patients will have TEE done as per standard of care in addition to office visit and complete clinical and neurological evaluation. Continuation or discontinuation of oral anticoagulation will depend on the 45-day TEE findings. The anticipated duration of the Clinical Investigation will be 12 months.
Primary purpose: TREATMENT

Brief summary: WATCH-TMVR (Watchman for Patients with Atrial Fibrillation Undergoing Transcatheter Mitral Valve) Clinical Trial have the main objective to assess the feasibility of combining clinically indicated MitraClip TMVR and Watchman LAAO in one setting.Mayo Clinic will be the data coordinating center for this trial, which will include up to 3 sites.

Detailed description: Left atrial appendage closure using the Watchman device procedure is approved by the FDA for patients with nonvalvular atrial fibrillation who have an indication for oral anticoagulation to reduce stroke risk but who also have a rational to seek an alternative to long-term anticoagulation (e.g., recurrent bleeding, fall risk). Transcatheter mitral valve repair with the MitraClip device is approved by the FDA for patients with severe degenerative mitral regurgitation who are deemed to be at high-risk for valve surgery and patients with severe secondary MR despite optimal medical therapy. It is also anticipated that the device will soon be approved for patients with severe symptomatic functional mitral regurgitation based on the results of the COAPT trials. Atrial fibrillation is common in patients referred for TMVr. A recent study from the Mayo Clinic documented that up to 50% of patients undergoing TMVr might qualify for LAA based on their risk assessment. Both procedures are performed via a large bore femoral venous access, and utilize transseptal puncture, general anesthesia, and transesophageal echo guidance. Hence, combining the two procedures in one session might provide incremental benefit to those patients by avoiding the risk of repeated large-bore access, transseptal puncture, and general anesthesia. A limited number of case reports illustrated the safety and feasibility of a combined TMVr with LAAO when clinically indicated. Experience with combined TMVr/LAAO in the United States is limited, mostly due to the lack of supportive data and concerns about the incremental cost of the Watchman device that might not be covered by the Center for Medicare Services (CMS) per current guidelines.

Eligibility criteria: Inclusion Criteria:

1. Men and Women ≥ 18 years of age;
2. The patient has severe symptomatic mitral regurgitation meet criteria for the commercially available MitraClip;
3. The patient also has documented paroxysmal, persistent, or permanent atrial fibrillation AND The patient meets the WATCHMAN labeling guidelines;
4. The patient is eligible for short-term oral anticoagulation therapy with Warfarin or a direct oral anticoagulant;
5. The patient or legal representative is able to understand and willing to provide written informed consent to participate in the trial;
6. The patient is able and willing to return for required follow-up visits.

Exclusion Criteria:

1. Mitral valve anatomy not deemed suitable for TMVr;
2. Moderate to severe mitral stenosis (mean gradient \>10 mmHg or MVA \<1.5 cm2);
3. Contraindication for short-term anticoagulation;
4. The patient has intra-cardiac thrombus as visualized by TEE within 1 week prior to Watchman procedure;
5. Prior occlusion of LAA;
6. Implanted mechanical mitral valve;
7. The patient requires long-term warfarin therapy due to:

   1. Secondary to conditions such as prior arterial embolism or other indications such as pulmonary embolism or deep vein thrombosis within the previous 6 months.
   2. The patient is in a hypercoagulable state.
8. Exclude the patient if per medical record documentation the patient meets any of the following criteria: • Thrombosis occurring at under 40 years age • Idiopathic or recurrent VTE (venous thromboembolism • Thrombosis at an unusual site (cerebral veins, hepatic veins, renal veins, IVC, mesenteric veins) • Family history of VTE or of inherited prothrombotic disorder, recurrence/extension of thrombosis while adequately anti-coagulated;
9. The patient is actively enrolled in another trial of a cardiovascular device or an investigational drug (post-market study and registries are acceptable);
10. The patient is pregnant, or pregnancy is planned during the course of the investigation if patient is of child bearing potential;
11. Any clinically significant medical condition or presence of any laboratory abnormality performed prior to randomization that is considered by the investigator to be clinically important and could interfere with the conduct of the study or not meeting procedure guidelines for WATCHMAN or TMVr with MitraClip;
12. The patient has a life expectancy of less than one year.

Primary outcomes:
measure: All-cause mortality rate
timeFrame: 45 days post procedure
measure: All-cause mortality rate
timeFrame: 1 Year post procedure
measure: Serious Adverse Events (SAEs)
timeFrame: 45 days post procedure
measure: Serious Adverse Events (SAEs)
timeFrame: 1 Year post procedure
Secondary outcomes:
measure: SAEs related to the Study devices
timeFrame: 1 Year
Other outcomes:
Locations:
city: Rochester
country: United States
facility: Mayo Clinic
state: Minnesota
city: Ottawa
country: Canada
facility: Ottawa Heart Institute
state: Ontario
Study officials:
affiliation: Mayo Clinic
name: Mohamad Adnan (Mohamad) Alkhouli, MD
role: PRINCIPAL_INVESTIGATOR
References: