Safety and reliability of the insertable Reveal XT recorder in patients undergoing 3 Tesla brain magnetic resonance imaging.
BACKGROUND
Up to now there is little evidence about the safety and reliability of insertable cardiac monitors (ICMs) in patients undergoing magnetic resonance imaging (MRI).


OBJECTIVE
The purpose of this prospective single-center study (MACPAF; clinicaltrials.govNCT01061931), which we are currently performing, was to evaluate these issues for the ICM Reveal XT at a 3 Tesla MRI scanner in patients undergoing serial brain MRI.


METHODS
We present an interim analysis including 62 brain MRI examinations in 24 patients with paroxysmal atrial fibrillation bearing the Reveal XT. All patients were interviewed for potential ICM-associated clinical symptoms during and after MRI examination. According to the study protocol, data from the Reveal XT were transmitted before and after the MRI examination.


RESULTS
All patients were clinically asymptomatic during the MRI procedure. Moreover, the reliability (ability to detect signals, battery status) of the Reveal XT was unaffected, except for one MRI-induced artifact that was recorded by the ICM, mimicking a narrow complex tachycardia, as similarly recorded in a further study patient bearing the forerunner ICM Reveal DX. No loss of ICM data was observed after the MRI examination.


CONCLUSIONS
The 3 Tesla brain MRI scanning is safe for patients bearing the ICM Reveal XT and does not alloy reliability of the Reveal XT itself. MRI-induced artifacts occur rarely but have to be taken into account.
Department of Neurology, Charité-University Medicine Berlin, Germany. georg.haeusler@charite.de
Karl Georg
KG
Haeusler
Lydia
L
Koch
Juliane
J
Ueberreiter
Nalan
N
Coban
Erdal
E
Safak
Claudia
C
Kunze
Kersten
K
Villringer
Matthias
M
Endres
Heinz-Peter
HP
Schultheiss
Jochen B
JB
Fiebach
Alexander
A
Schirdewan
D000328:Adult; D000368:Aged; D016477:Artifacts; D001281:Atrial Fibrillation / Q000175:diagnosis* / Q000601:surgery*; D001921:Brain / Q000473:pathology; D017115:Catheter Ablation; D015716:Electrocardiography, Ambulatory / Q000295:instrumentation*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D008991:Monitoring, Physiologic / Q000295:instrumentation; D011446:Prospective Studies; D011667:Pulmonary Veins / Q000601:surgery; D015203:Reproducibility of Results