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Collection of a few ECGs in congenital heart diseases

All About Cardiovascular System and Disorders

The sign has been described in VSD with biventricular hypertrophy in children. It can be seen with isolated VSD as well as complex ventricular septal defect. Katz-Wachtel Phenomenon or Sign on ECG in VSD An ECG with Katz-Wachtel phenomenon is shown here.