Technical - Interventional CMR-The Safety of External Cardiac Defibrillation inside the Magnet Bore: Patterns and Features of Mechanical Forces

The Safety of External Cardiac Defibrillation inside the Magnet Bore: Patterns and Features of Mechanical Forces

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Video Summary

The speaker presents preliminary pig data on the safety of external cardiac defibrillation inside an MRI scanner bore. Because defibrillation must occur within two minutes, removing a patient from MRI is often too slow. In six pigs, 18 shocks at 200–360 J were delivered outside the bore, inside the bore, and during active MRI scanning. All defibrillations successfully restored rhythm. Mechanical forces and torso acceleration were similar inside and outside the bore and comparable to everyday motions like train braking or car turns. Standard straps limited movement, suggesting in-bore defibrillation may be feasible, though further study is needed.

Keywords

MRI scanner bore

external cardiac defibrillation

pig study

defibrillation safety

mechanical forces