- Oral presentation
- Open Access
Cardiac MRI is safe in patients with pacemakers and defibrillators
© Baher et al; licensee BioMed Central Ltd. 2012
- Published: 1 February 2012
- Pulse Oximetry
- Meaningful Change
- Troponin Level
- Device Parameter
- Potential Safety
MRI has generally been contraindicated in patients (pts) with pacemakers (PM) or defibrillators (ICD) due to concern of a variety of potential complications. Several recent series have suggested potential safety of MRI in pts with cardiac devices, but most excluded cardiac or thoracic imaging. Additionally there is very limited data on safety of CMR in pts with devices, especially in pts with ICD.
Pts with devices underwent CMR on a 1.5-T Siemens Avanto scanner utilizing a pre-specified protocol that involved device interrogation and programming prior to, and immediately after CMR to assess lead impedance, battery voltage, and pacing capture/sensing thresholds. Devices in PM dependent pts (intrinsic HR < 60 bpm) were reprogrammed to asynchronous pacing mode, whereas devices in non-PM dependent pts were reprogrammed to pacing function deactivated. All underwent rhythm, pulse oximetry, and visual monitoring during CMR. All pts were scheduled for follow up device interrogation to evaluate for later changes in device parameters. For hospitalized pts troponin levels were measured prior to and 8 hours after CMR.
Patients with PM or ICD may safely undergo CMR using a pre-designed protocol without any clinically meaningful change in device function.
This article is published under license to BioMed Central Ltd. This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.