1. Inappropriate shocks by subcutaneous implantable cardioverter-defibrillator due to T- wave oversensing in hyperkalemia leading to ventricular fibrillation 
Omid Kiamanesh, MD, Deirdre O’Neill, MD, Soori Sivakumaran, MD, FRCPC, Shane Kimber, MD, FRCPC 
HeartRhythm Case Reports 
Volume 1, Issue 4, Pages (July 2015)
DOI: /j.hrcr
Copyright © 2015 Heart Rhythm Society Terms and Conditions

2. Figure 1
Surface electrocardiogram from the subcutaneous implantable cardioverter-defibrillator demonstrating appropriate QRS-T complex discrimination during implantation and normokalemia.
HeartRhythm Case Reports 2015 1, DOI: ( /j.hrcr )
Copyright © 2015 Heart Rhythm Society Terms and Conditions

3. Figure 2
Surface electrocardiogram from the subcutaneous implantable cardioverter-defibrillator demonstrating inappropriate shocks due to T-wave oversensing in the setting of hyperkalemia (serum potassium 7.0 mmol/L), leading to sustained ventricular fibrillation requiring 4 shocks prior to termination.
HeartRhythm Case Reports 2015 1, DOI: ( /j.hrcr )
Copyright © 2015 Heart Rhythm Society Terms and Conditions