The spatial QRS-T angle outperforms the Italian and Seattle ECG-based criteria for detection of hypertrophic cardiomyopathy in pediatric patients

•We compared the Italian and Seattle criteria to the spatial QRS-T angle to identify patients with hypertrophic cardiomyopathy.•We utilized a method for determining the spatial QRS-T angle based on any available ECG, paper or electronic.•We demonstrate the improved performance of the spatial QRS-T angle over the other two criteria.•We demonstrate ventricular tachycardia predictive power in a small subset of hypertrophic cardiomyopathy patients.