Technical - Interventional CMR-MRI-conditional Reduced Pain external Defibrillation (RPD). System construct and Swine testing.

MRI-conditional Reduced Pain external Defibrillation (RPD). System construct and Swine testing.

Video Transcription

Video Summary

The speaker describes an MR-conditional, reduced-pain external defibrillation system developed at Johns Hopkins for use in MRI, cardiac arrest, and electrophysiology settings. Conventional shocks cause severe muscle contraction, pain, and patient motion. Their solution adds a preconditioning “tetanizing” waveform before the defibrillation pulse to reduce acceleration and discomfort. In seven swine and 230 defibrillations, the optimized waveform lowered peak limb acceleration by 74% and limb work by 85% while preserving defibrillation effectiveness. The system may enable safer defibrillation on the MRI table and improve care for sicker cardiac patients.

Keywords

MR-conditional defibrillation

MRI-compatible

reduced-pain shock

tetanizing waveform

cardiac arrest