Biventricular hypertrophy

  Katz-Wachtel phenomenon ( sign ):

      Large biphasic (equiphasic) QRS complexes observed in midprecordial and limb leads.

      Sum of the amplitudes of R wave and S wave in leads C2, C3 or C4 is
> 60mm (6mV).


  Circulation 2009,119:e251-e261.

ECG 1. The above ECG belongs to an 11 years old boy who was operated for atrial septal defect, ventricular septal defect and
coarctation of the aorta.

The above ECG has been donated by Dr. Mahmut Gokdemir.

Click here for a more detailed ECG