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U.S. Department of Health and Human Services

Post-Approval Studies (PAS) Database

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The FDA has the authority to require sponsors to perform a post-approval study (or studies) at the time of approval of a premarket approval (PMA), humanitarian device exemption (HDE), or product development protocol (PDP) application. Post-approval studies can provide patients, health care professionals, the device industry, the FDA and other stakeholders information on the continued safety and effectiveness (or continued probable benefit, in the case of an HDE) of approved medical devices. This database allows you to search Post-Approval Study information by applicant or device information.

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Attain Stability Quad PAS

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Study Status Progress Adequate
Application Number P080006 S129/ PAS001
Date Current Protocol Accepted  
Study Name Attain Stability Quad PAS
General Study Protocol Parameters
Study Design Prospective Cohort Study
Data Source Sponsor Registry
Comparison Group Concurrent & Historical Control
Analysis Type Descriptive
Study Population Adult: >21
Detailed Study Protocol Parameters
Study Design Description The Medtronic Attain Stability Quad (ASQ) LV Lead Post-Approval Study (PAS) is a nonrandomized, multi-site, world-wide clinical study of implanted commercially available Model 4798 leads. The study is conducted in the US, Canada, Europe (and Asia). All enrolled patients were implanted with a Model 4798 LV Lead and all data is collected prospectively.

Data will be collected through Medtronic’s Post Market Surveillance platform and through leveraging extant data including potential use of administrative claims, electronic health records, available registries, and remote monitoring.

The study requires a minimum of 1000 leads enolled to satisfy both the primary objective analysis sample size requirement and to estimate individual failure modes at five year post implant for the general population. Attain Stability Quad ISE patients are eligible to continue in the PAS upon market approval is followed at a participating Product Surveillance Registry (PSR) study site and are consented.
Study Population Description Patients included in the Model 4798 lead Post Approval Study, were consented and implanted with a Model 4798 LV Lead
Sample Size The PAS plans to prospectively enroll 1000 subjects through the PSR

Sample Size Justification
Power 0.864
a 0.05 (two-sided)
Success Rate, investigational 95.5%
PG 92.5%
Attrition 12% per year
N 1000

Data Collection Primary Objective
To demonstrate that the complication-free probability is greater than 92.5% at five years post-implant for Attain Stability Quad LV leads

Primary objective analysis includes all complications related to lead hardware or design failure as pre-specified in the Attain Stability Quad Post Approval Study, Analysis Plan (Version 1, 12 Oct 2018) and base protocol of the Product Surveillance Registry (PSR) (Version 6, 7 March 2016).
Secondary Objective
To summarize all lead related adverse events or Adverse Device Effects (ADEs)
To summarize analysis results from explanted and returned Attain Stability Quad leads

Follow-up Visits and Length of Follow-up All enrolled patients will be followed for 5 years
Interim or Final Data Summary
Interim Safety Information Safety: As of the report data cut-off date of 01DEC2021, there have been 36 Model 4798 events reported, 33 of which have been reviewed by the CEC. Among those, nine (9) (in 8 lead / 8 patients) were adjudicated as Model 4798 related complications and 24 were classified as observations. There are 3 events pending CEC adjudication. Effectiveness: The sponsor states that to date there have been 30 leads with elevated thresholds, and 1 occurrence from 1 unique lead which was adjudicated by the CEC as a complication. There are 3 patients with pacing impedance outside the normal range (200 – 2999 Ohms) at any time post implant. None were reported as an adverse device event.
Actual Number of Patients Enrolled 567
Actual Number of Sites Enrolled 79
Patient Follow-up Rate 88.54%
Study Strengths & Weaknesses Study appears to be adequately progressing

Attain Stability Quad PAS Schedule

Report Schedule
Date Due
FDA Receipt
Applicant's Reporting Status
6 month report 10/10/2019 10/08/2019 On Time
1 year report 04/07/2020 04/03/2020 On Time
18 month report 10/10/2020 10/09/2020 On Time
2 year report 04/10/2021 04/08/2021 On Time
3 year report 04/10/2022 04/07/2022 On Time
4 year report 04/10/2023    

Contact Us

Mandated Studies Program
Food and Drug Administration
10903 New Hampshire Ave.
Silver Spring, MD 20993-0002
Email: MandatedStudiesPrograms@fda.hhs.gov

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