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Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
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Cardiovascular magnetic resonance imaging, or CMRI, is a non-invasive diagnostic test that employs a magnetic field and radiofrequency waves to create precise images of the heart and arteries. It provides comprehensive information about cardiac anatomy, function, perfusion, and tissue characterization without ionizing radiation.IndicationsCMRI diagnoses various heart conditions, including tissue damage from heart attacks, ischemic heart disease, myocarditis, aortic issues (tears, aneurysms,...
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Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
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Imaging Studies IV: Magnetic Resonance Imaging01:27

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Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...

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Magnetic Resonance Imaging Safety in Patients With Conditional Mixed-Manufacturer Devices.

Ryka M Tashakkor1, Kian Zamanian1, Nathan Scott2

  • 1Southern California Heart Specialist, Arcadia, California, USA.

Pacing and Clinical Electrophysiology : PACE
|May 22, 2026
PubMed
Summary

Magnetic resonance imaging (MRI) is safe for patients with mixed-company cardiac implantable electronic devices (CIEDs). This study found no adverse events or device issues during MRI scans in patients with mixed-lead CIEDs.

Keywords:
cardiac implantable electronic devicesleadsmagnetic resonance imagingpacemakersafety

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Area of Science:

  • Cardiovascular Imaging
  • Medical Device Safety
  • Electrophysiology

Background:

  • Magnetic resonance imaging (MRI) offers high-resolution, non-invasive diagnostics.
  • Safety concerns exist for MRI in patients with cardiac implantable electronic devices (CIEDs), especially mixed-lead systems.
  • Mixed-lead CIEDs involve components from different manufacturers, often lacking official MRI-conditional labeling.

Purpose of the Study:

  • To investigate the safety and efficacy of MRI scans in patients with mixed-lead CIEDs.
  • To assess potential adverse events and device malfunctions during MRI in this population.
  • To evaluate the stability of CIED parameters post-MRI exposure.

Main Methods:

  • Retrospective, single-center study of 16 patients with mixed-company lead CIEDs.
  • 23 clinically indicated 1.5 Tesla MRI scans were performed between July 2021 and August 2025.
  • Pre- and post-scan assessments included lead impedance, sensing thresholds, battery voltage, and monitoring for clinical complications.

Main Results:

  • No adverse clinical events (arrhythmias, syncope, cardiac arrest) were observed.
  • No device malfunctions were reported during or after the MRI scans.
  • All critical CIED parameters (lead impedance, sensing, battery voltage) remained stable post-scan.

Conclusions:

  • MRI scans can be safely performed in patients with mixed-lead CIEDs.
  • The study supports the use of MRI in this patient group without compromising device integrity or patient safety.
  • Further research may confirm these findings in larger, multi-center cohorts.