Arrhythmias & electrophysiology
Implantable Defibrillator System Shock Function, Mortality, and Cause of Death After Magnetic Resonance Imaging
Authors' conclusion
Non-MRI-conditional ICDs appropriately treated detected tachyarrhythmias after MRI. No serious adverse effects on device function were reported after MRI.
Study context
- Population
- Patients with non-MRI-conditional implantable cardioverter-defibrillators (ICDs) undergoing magnetic resonance imaging (MRI), enrolled consecutively February 2003–January 2015, 1 US centre
- Participants
- 629 patients813 MRI examinations
- Outcome
- Preserved ICD shock function for arrhythmias after MRI
Methodological detailssingle-centre
- Single-centre
Main finding
As reported in the abstract
median follow-up 2.2 years
Arrhythmia episodes detected
4177
Patients receiving ICD shocks
97
Patients with spontaneous VT/VF terminated by ICD shocks
61
10% of total
Spontaneous VT/VF events terminated by ICD shocks
130
Observational data: associations, not effects.
Further findings
Mortality and cause of death · median 1.7 years from MRI to death
- Patients known to have died
- 210 (33% of total)
- Cardiac arrhythmia deaths where shocks were indicated, without direct evidence of device dysfunction
- 3
Original publication
Implantable Defibrillator System Shock Function, Mortality, and Cause of Death After Magnetic Resonance Imaging. Ann Intern Med. Published 31 January 2023. doi:10.
Composed by AI from the published abstract and checked against it. How Briefs are made →