Safety of serial MRI in patients with implantable cardioverter defibrillators
Key result
Serial 1.5T CMR scans in ICD patients show 0 complications or device dysfunctions.
- n=10
Why the study?
Does serial cardiac MRI at 1.5 T cause adverse effects or device dysfunction in patients with implantable cardioverter defibrillators?
Population
10 patients with implantable cardioverter defibrillators (ICDs), median age 56 years, 9 men.
Design
Case_series
Follow-up
median 370 days (range 274-723)
Authors
Discussion
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Implication
Serial MR may be feasible in ICD patients; leaves open whether guidelines should shift without randomized confirmation.
Key Points
- To evaluate the safety and image quality of serial 1.5-T cardiac magnetic resonance imaging in patients with implantable cardioverter defibrillators.
- Prospective study of 10 patients (9 men; median age 56 years, range 51–68) with implantable cardioverter defibrillators undergoing three serial 1.5-T cardiac MRI scans.
- Device interrogation was performed immediately before and after each scan, with long-term clinical and device follow-up at a median of 370 days (range 274–723).
- All scans completed without complications, showing no significant alterations in pacing capture threshold, lead impedance, or battery voltage, and zero device failures during long-term follow-up.
- Image quality was diagnostic for left ventricular function and wall motion across all patients, and delayed enhancement imaging reliably identified inferior and inferolateral infarcts despite anterior artifacts.
Study Design
Type
Observational (n=10)
Structured PICO
Does serial cardiac MRI at 1.5 T cause adverse effects or device dysfunction in patients with implantable cardioverter defibrillators?
P
Population
10 patients (10% female, median age 56) with ICDs undergoing serial cardiac MR scans at 1.5 T, followed for a median of 370 days.
E
Exposure
Three serial cardiac MR scans at 1.5 T
O
Outcome
Safety (complications, pacing capture threshold, lead impedance, battery voltage, ICD dysfunction)safety
Serial 1.5 T cardiac MRI can be safely performed in patients with ICDs without adverse effects on the patient or device function, despite historical contraindications.
Limitations
- ICD artifacts often affected the imaging of anterior wall infarcts
Cite This Study
Junttila et al. (2011) conducted an observational in Implantable cardioverter defibrillators (ICDs) (n=10). Serial cardiac MR scans at 1.5 T was evaluated on Complications and ICD dysfunction. Serial cardiac MR scans at 1.5 T in patients with ICDs resulted in 0 complications and no occurrences of ICD dysfunction during a median follow-up of 370 days.