AbstractIt is generally considered that in complete right bundle branch block, the electrocardiographic standard for the diagnosis of right ventricular hypertrophy is not applicable.According to Cohen's criteria, right ventricular overload exists if thallium‐201 myocardial perfusion demonstrates the right ventricular wall, and in this light we attempted to reassess the validity of the electrocardiographic standard for right ventricular hypertrophy.Twenty‐three children with complete right bundle branch block (abbreviated as CRBBB) were evaluated. The agreement and disagreement ratios of the electrocardiographic standard with Cohen's criteria was 20/23 and 3/23 respectively. Even in patients without intracardiac anomalies, right ventricular overload was suspected by Cohen's criteria.The electrocardiographic standard was in agreement with Cohen's criteria in most of these patie