1. Bidirectional ventricular tachycardia resulting from herbal aconite poisoning 
Stephen W. Smith, MD 
Annals of Emergency Medicine 
Volume 45, Issue 1, Pages (January 2005)
DOI: /j.annemergmed
Copyright © 2005 American College of Emergency Physicians Terms and Conditions

2. Figure 1 (Smith et al) Root identified as Aconitum carmichaelii.
Annals of Emergency Medicine  , DOI: ( /j.annemergmed )
Copyright © 2005 American College of Emergency Physicians Terms and Conditions

3. Figure 2 (Smith et al)
ECG showing bidirectional tachycardia with alternating left and right bundle-branch block.
Annals of Emergency Medicine  , DOI: ( /j.annemergmed )
Copyright © 2005 American College of Emergency Physicians Terms and Conditions