Impact of the Advisa MRI pacing system on the diagnostic quality of cardiac MR images and contraction patterns of cardiac muscle during scans: Advisa MRI randomized clinical multicenter study results

Abstract

In the Advisa MRI study, high-quality CMR images for the assessment of cardiac anatomy and function were obtained in most patients with an implantable pacing system. In addition, this study demonstrated the feasibility of acquiring tagging data to study the LV function during pacing.

Compressed Sensing Single–Breath-Hold CMR for Fast Quantification of LV Function, Volumes, and Mass

“…With recently-established quality criteria applied (9), a score $3 (i.e., artifacts in $3 slices) was obtained in only 2 participants (6% of study participants). The standard cine CMR technique is known to yield good image quality in patients equipped with MR-conditional pacemakers(21), and similarly, an excellent quality was achieved with the CS approach in a pacemakerimplanted patient as illustrated inFigure 4. The high image quality of the CS technique translated into high agreement for LVEF, with a mean difference versus the standard multi-breath-hold technique of 1.3% (95% confidence interval [CI]: À7.2% to þ9.7%).…”

Current artefacts in cardiac and chest magnetic resonance imaging: tips and tricks

“…2,3 The susceptibility artefacts ( Figure 5) represent a major concern at high magnetic fields (e.g. 3 T), particularly when using balanced steady-state free precession sequences ( Figure 6) or when scanning patients with pacemakers 5 or implantable cardioverter defibrillator ( Figure 7). These artefacts can also be exaggerated when using single-shot echoplanar sequences and long echo times.…”

“…With the new generation of MRconditional pacemakers, high-quality images of the heart are obtained even for steady-state free precession acquisitions. 5 Chemical shift artefact These artefacts are common and manifest as either bright and dark lines on both sides of fat-water interfaces (first type) or signal void in gradient recall-echo imaging (out of phase) (second type). Inherent differences in the precessional rates of fat and water in an applied magnetic field result in spatial shifts in the frequency-encoding direction.…”

Clinical safety of the ProMRI pacemaker system in patients subjected to head and lower lumbar 1.5-T magnetic resonance imaging scanning conditions

“…Future studies also should be performed to confirm that image quality with cardiac implanted electronic devices can be maintained to a sufficiently high quality to be clinically useful. 12 As MRI scanner technology advances, more safety studies and device modifications will be needed to maintain safety with more powerful scanners and new scan protocols and sequences.…”

“…8,9 Recently, pacemakers specifically designed for the MRI environment have been shown to be safe under certain conditions and to maintain image quality. [10][11][12] The ProMRI/ProMRI AFFIRM studies are prospective single-arm, nonrandomized, multicenter multinational studies designed to demonstrate the clinical safety of the ProMRI s Pacemaker System (Evia/Entovis SR-T and DR-T with Setrox/Safio S 53-cm/60-cm leads; Biotronik, Berlin, Germany) when used under specific 1.5-T MRI conditions (ClinicalTrial.gov Identifiers: NCT01460992 and NCT01761162).…”