Impact of magnetic resonance imaging on ventricular tachyarrhythmia sensing: Results of the Evera MRI Study
| Autor: | Béla Merkely, Michael R. Gold, Emanuel Kanal, Ralf Surber, Matthew A. Bernabei, Brian Ramza, Torsten Sommer, Jeffrey Cerkvenik, Juerg Schwitter, Charles J. Love |
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| Rok vydání: | 2016 |
| Předmět: |
Male
medicine.medical_specialty Ventricular Tachyarrhythmias Heart Ventricles medicine.medical_treatment Magnetic Resonance Imaging Cine 030204 cardiovascular system & hematology 030218 nuclear medicine & medical imaging Electrocardiography 03 medical and health sciences 0302 clinical medicine Heart Conduction System Physiology (medical) Internal medicine medicine Humans medicine.diagnostic_test business.industry Reproducibility of Results Magnetic resonance imaging Equipment Design Middle Aged medicine.disease Implantable cardioverter-defibrillator Defibrillators Implantable Induced ventricular tachycardia Ventricular fibrillation Tachycardia Ventricular Cardiology Female Medical emergency Electrical conduction system of the heart Cardiology and Cardiovascular Medicine No detection business Follow-Up Studies |
| Zdroj: | Heart Rhythm. 13:1631-1635 |
| ISSN: | 1547-5271 |
| Popis: | Background Studies have shown that magnetic resonance imaging (MRI) conditional pacemakers experience no significant effect from MRI on device function, sensing, or pacing. More recently, similar safety outcomes were demonstrated with MRI conditional defibrillators (implantable cardioverter-defibrillator [ICD]), but the impact on ventricular arrhythmias has not been assessed. Objective The purpose of this study was to assess the effect of MRI on ICD sensing and treatment of ventricular tachyarrhythmias. Methods The Evera MRI Study was a worldwide trial of 156 patients implanted with an ICD designed to be MRI conditional. Device-detected spontaneous and induced ventricular tachycardia/ventricular fibrillation (VT/VF) episodes occurring before and after whole body MRI were evaluated by a blinded episode review committee. Detection delay was computed as the sum of RR intervals of undersensed beats. A ≥5-second delay in detection due to undersensing was prospectively defined as clinically significant. Results Post-MRI, there were 22 polymorphic VT/VF episodes in 21 patients, with 16 of these patients having 17 VT/VF episodes pre-MRI. Therapy was successful for all episodes, with no failures to treat or terminate arrhythmias. The mean detection delay due to undersensing pre- and post-MRI was 0.60 ± 0.59 and 0.33 ± 0.63 seconds, respectively (P = .17). The maximum detection delay was 2.19 seconds pre-MRI and 2.87 seconds post-MRI. Of the 17 pre-MRI episodes, 14 (82%) had some detection delay as compared with 11 of 22 (50%) post-MRI episodes (P = .03); no detection delay was clinically significant. Conclusion Detection and treatment of VT/VF was excellent, with no detection delays or significant impact of MRI observed. |
| Databáze: | OpenAIRE |
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