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OpenTrials
Completed

NCT Number: NCT03786640

Abbott Brady 3T MRI PMCF

The objective of this post-market, clinical follow up (PMCF) study, is to confirm the long-term safety of the Tendril STS and Isoflex leads, implanted with the Assurity MRI™ or Endurity MRI™ pacemakers, in patients undergoing a clinically indicated 3T MRI (3 Tesla Magnetic Resonance Imaging) scan.

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Key information

Age range

18 year and older

Sex eligibility

All sexes

Study type

Observational

Primary location

Tartu University Hospital, Tartu, Estonia

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About this study

This prospective, non-randomized, observational study will be conducted at 35 centers worldwide where the study devices have 3T MR Conditional labeling; up to 110 patients will be enrolled, and will satisfy the recent PMCF requirement to maintain the CE mark.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Subject must be willing and able to provide informed consent for study participation (legal guardian or legally authorized representative is NOT acceptable).
  • Subject must be implanted with a St. Jude Medical Tendril STS 2088 or Isoflex 1944/1948 lead, and Assurity MRI or Endurity MRI pacemaker.
  • Capture threshold is stable and < 2.5V @ 0.5ms at the time of enrollment.
  • Subject is clinically indicated for a 3T MRI scan without sedation NOTE: Antianxiety agents (e.g. minor tranquilizers, etc.) may be used as long as the patient can communicate with site personnel during the MRI scan
  • Subject is willing and able to comply with the prescribed follow-up tests and schedule of evaluations.

Exclusion criteria

  • The subject is currently participating in a clinical investigation that includes an active treatment arm that may confound the results of this study as determined by Abbott.
  • The subject is <18 years old (pediatric).
  • That subject has a life expectancy of less than 12 months due to any condition.
  • Pregnant or nursing subjects and those who plan pregnancy during the clinical investigation follow-up period.
  • Presence of other anatomic or comorbid conditions, or other medical, social, or psychological conditions that, in the investigator's opinion, could limit the subject's ability to participate in the clinical investigation or to comply with follow-up requirements, or impact the scientific soundness of the clinical investigation results.
  • Any contraindication to MRI scan, including the presence of additional hardware (e.g. lead extenders, lead adapters, surgical staples, stents, dental braces, or abandoned leads).

Treatment and study plan

3T MRI scan

Radiation

A clinically indicated 3T MRI scan will be performed per standard procedures for the radiology department. Cardiac monitoring during the MRI scan is recommended to include Pulse Oximetry and/or ECG.

Primary outcomes

  1. Proportion of subjects with a capture threshold increase of ≤ 0.5V at the permanently programmed pulse width

    Time frame: from pre- MRI scan to one-month post MRI scan

Secondary outcomes

  1. Proportion of subjects with a sensing amplitude decrease of ≤ 50% from pre-MRI scan to one-month post-MRI scan

    Time frame: from pre-MRI scan to one-month post-MRI scan

Other outcomes

  1. Rate of MRI-related adverse events

    Time frame: from pre- to 12-month post- MRI scan

    including but not limited to, the following:

    • Device (pulse generator) heating resulting in tissue damage in the implant pocket, or patient pocket discomfort, or both.
    • Induced currents on leads resulting in continuous capture, VT/VF, hemodynamic collapse, or all three.
    • Loss of pacing or capture in the MRI environment.

Sponsors and collaborators

Lead sponsor

Abbott Medical Devices

Industry

Registry information

Official study title

Long Term Follow-up of the Tendril STS and Isoflex Leads in Conjunction With the Assurity MRI™ and Endurity MRI™ Pacemakers Within the 3T MRI Environment (Brady 3T MRI PMCF)

Important dates

Study start
2019
Primary completion
2021
Study completion
2021
First posted
Dec 26, 2018
Registry last updated
Apr 14, 2022

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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