An observational study in Atrial Fibrillation, Thromboembolism and Stroke, sponsored by Abbott Medical Devices. Completed at 22 sites in 7 countries. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2024-03-29.
Sponsored by Abbott Medical Devices · Observational
The aim of this multicenter, non-randomized observational post-approval is to compile real world outcome data on the use of an AMPLATZER LAA Occluder in subjects with non-valvular atrial fibrillation (NVAF). The AMPLATZER LAA Occluders is a transcatheter, self-expanding nitinol device intended for use in preventing thrombus embolization from the LAA.
3,872 studies on the registry are indexed under Atrial Fibrillation; 926 are open to participants now.
This study's enrollment of 520 is above the median of 300 across 1,364 observational studies indexed under Atrial Fibrillation.
Browse Atrial Fibrillation studies →Abbott Medical Devices is the lead sponsor of 525 studies on the registry; 35 are open to participants now.
Of its 52 completed or terminated interventional studies of FDA-regulated products, 43 (83%) have results posted.
Counted across the registry records on this site, refreshed daily.
The subject population will include participants that are > 18 years old and diagnosed with NVAF.
Exclusion Criteria:
Subjects who were treated with AMPLATZER LAA Occluders will be included.
Device: AMPLATZER™ LAA Occluder
The AMPLATZER™ LAA Occluder is intended to prevent thrombus embolization from the left atrial appendage (LAA) in patients who have nonvalvular Atrial Fibrillation (AF). It may be considered for use in patients who have a high risk of stroke and bleeding and are deemed by their physician to have an appropriate rationale to seek a non-pharmacologic alternative to long term anticoagulants.
Also known as: AMPLATZER™ Cardiac Plug™, AMPLATZER™ Amulet™
Primary Effectiveness Endpoint 1: Composite Rate of Stroke (Including Ischemic or Hemorrhagic), Systemic Embolism and Cardiovascular or Unexplained Death
The occurrence of one or more the composite of stroke (including ischemic or hemorrhagic), systemic embolism, or cardiovascular or unexplained death at 24 months from the time of enrollment
Time frame: Implant through 24 months
Primary Effectiveness Endpoint 2: Composite Rate of Ischemic Stroke or Systemic Embolism
The occurrence of ischemic stroke or systemic embolism at 24 months from the time of enrollment
Time frame: Implant through 24 months
Primary Safety Endpoint: Number of Subjects With All Cause Death, Ischemic Stroke, Systemic Embolism, or Device or Procedure-Related Events Requiring Open Cardiac Surgery or Major Endovascular Repair
The occurrence of one of the following events between the time of implant and within 7 days of the procedure or by hospital discharge, whichever is later: all-cause death, ischemic stroke, systemic embolism, or device or procedure-related events requiring open cardiac surgery or major endovascular repair
Time frame: Implant through 7 days
Comparison of the Relative Risk Decrease Of Observed Rate of Ischemic Stroke at 24 Months With the CHA2DS2-VASc Predicted Rate for the Implant Population
The secondary endpoint comparing the observed rate of ischemic stroke at 24 months with the congestive heart failure, hypertension, age ≥ 75 years, diabetes mellitus, stroke or transient ischemic attack (TIA), vascular disease, age 65 to 74 years, sex category (CHA2DS2-VASc) score predicted rate for the implant population. The following calculation was used to calculate the Relative Risk Decrease: (Predicted Rate minus Observed Rate) divided by Predicted Rate = Relative Risk Decrease.
Time frame: Implant through 24 months
A total of 520 patients were enrolled and underwent Amplatzer LAA Occluder implant attempt at 22 investigational sites between December 8, 2016 and July 2, 2020.
| Milestone | LAA Occluder PAS |
|---|---|
| Started | 520 |
| Completed | 396 |
| Not completed | 124 |
| Withdrew: Death | 103 |
| Withdrew: Withdrawal by subject | 6 |
| Withdrew: Lost to follow-up | 6 |
| Withdrew: Unsuccessful procedure | 5 |
| Withdrew: Device explant | 1 |
| Withdrew: Anatomical heart structure of the patient; laa occluder was not implanted; heart transplant | 3 |
The occurrence of one or more the composite of stroke (including ischemic or hemorrhagic), systemic embolism, or cardiovascular or unexplained death at 24 months from the time of enrollment
| percentage of participants | LAA Occluder PAS |
|---|---|
| Primary Effectiveness Endpoint 1: Composite Rate of Stroke (Including Ischemic or Hemorrhagic), Systemic Embolism and Cardiovascular or Unexplained Death | 14.28 |
The occurrence of ischemic stroke or systemic embolism at 24 months from the time of enrollment
| percentage of participants | LAA Occluder PAS |
|---|---|
| Primary Effectiveness Endpoint 2: Composite Rate of Ischemic Stroke or Systemic Embolism | 4.41 |
The occurrence of one of the following events between the time of implant and within 7 days of the procedure or by hospital discharge, whichever is later: all-cause death, ischemic stroke, systemic embolism, or device or procedure-related events requiring open cardiac surgery or major endovascular repair
| Participants | LAA Occluder PAS |
|---|---|
| Primary Safety Endpoint: Number of Subjects With All Cause Death, Ischemic Stroke, Systemic Embolism, or Device or Procedure-Related Events Requiring Open Cardiac Surgery or Major Endovascular Repair | 3 |
The secondary endpoint comparing the observed rate of ischemic stroke at 24 months with the congestive heart failure, hypertension, age ≥ 75 years, diabetes mellitus, stroke or transient ischemic attack (TIA), vascular disease, age 65 to 74 years, sex category (CHA2DS2-VASc) score predicted rate for the implant population. The following calculation was used to calculate the Relative Risk Decrease: (Predicted Rate minus Observed Rate) divided by Predicted Rate = Relative Risk Decrease.
| percent change in the rate | LAA Occluder PAS |
|---|---|
| Comparison of the Relative Risk Decrease Of Observed Rate of Ischemic Stroke at 24 Months With the CHA2DS2-VASc Predicted Rate for the Implant Population | -70 |
Collected over 24 months. Non-serious events are listed at a 0% frequency threshold.
| Group | Deaths | Serious | Other |
|---|---|---|---|
| LAA Occluder PAS | 103/520 (19.8%) | 201/520 (38.7%) | 3/520 (0.6%) |
| Event | LAA Occluder PAS |
|---|---|
| Gastrointestinal BleedingGastrointestinal disorders | 35/520 |
| AnemiasBlood and lymphatic system disorders | 17/520 |
| Ischemic StrokeNervous system disorders | 17/520 |
| Pericardial TamponadeCardiac disorders | 11/520 |
| OtherGeneral disorders | 10/520 |
| SepsisInfections and infestations | 9/520 |
| Intracerebral HaemorrhageNervous system disorders | 9/520 |
| Heart FailureCardiac disorders | 8/520 |
| Respiratory FailureRespiratory, thoracic and mediastinal disorders | 8/520 |
| Congestive Heart FailureCardiac disorders | 7/520 |
| Event | LAA Occluder PAS |
|---|---|
| Thrombus on DeviceProduct Issues | 1/520 |
| Transient Ischemic Attack (TIA)Nervous system disorders | 1/520 |
| Unstable AnginaCardiac disorders | 1/520 |
| Age, Continuous(Years) | LAA Occluder PAS |
|---|---|
| Mean | 75.90 ± 8.10 |
| Sex: Female, Male(Participants) | LAA Occluder PAS |
|---|---|
| Female | 185 |
| Male | 335 |
| Ethnicity (NIH/OMB)(Participants) | LAA Occluder PAS |
|---|---|
| Hispanic or Latino | 48 |
| Not Hispanic or Latino | 248 |
| Unknown or Not Reported | 224 |
| Race (NIH/OMB)(Participants) | LAA Occluder PAS |
|---|---|
| American Indian or Alaska Native | 1 |
| Asian | 16 |
| Native Hawaiian or Other Pacific Islander | 2 |
| Black or African American | 0 |
| White | 303 |
| More than one race | 11 |
| Unknown or Not Reported | 187 |
| Medical History(Participants) | LAA Occluder PAS |
|---|---|
| History of Major Bleeding | 392 |
| HAS-BLED score | 520 |
| History of TIA | 65 |
| History of Stroke | 160 |
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