Unstable accelerated idioventricular rhythm in a neonate with congenital heart disease Jonathon Hagel, BMSc, MB, BCH, BAO, Carolina Escudero, BSc, MSc,

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Unstable accelerated idioventricular rhythm in a neonate with congenital heart disease Jonathon Hagel, BMSc, MB, BCH, BAO, Carolina Escudero, BSc, MSc, MD, FRCPC, Joel Kirsh, BASc, MSc, MD, FRCPC, FHRS HeartRhythm Case Reports Volume 3, Issue 2, Pages 137-140 (February 2017) DOI: 10.1016/j.hrcr.2016.11.004 Copyright © 2016 Heart Rhythm Society Terms and Conditions

Figure 1 A: A 12-lead electrocardiogram showing normal sinus rhythm. B: Accelerated idioventricular rhythm with wide QRS complexes, fusion beats, and ventricular-atrial dissociation, at rates similar to sinus rhythm. C: Ventricular tachycardia of similar QRS morphology to accelerated idioventricular rhythm. HeartRhythm Case Reports 2017 3, 137-140DOI: (10.1016/j.hrcr.2016.11.004) Copyright © 2016 Heart Rhythm Society Terms and Conditions

Figure 2 A 12-lead electrocardiogram showing an atrial paced rhythm with suppression of the accelerated idioventricular rhythm. HeartRhythm Case Reports 2017 3, 137-140DOI: (10.1016/j.hrcr.2016.11.004) Copyright © 2016 Heart Rhythm Society Terms and Conditions