Quantitative aspects of electrocardiogram in a Jordanian population

Twelve lead electrocardiographic tracings were obtained from 297 subjects aged 15-64 years, selected randomly from the Jordan University Hospital staff members, student doctors and student nurses. The values of selected measurements are reported including intervals, amplitudes and the mean QRS electrical axis in the frontal plane. The relation between certain electrocardiographic characteristics and age, body built, arterial pressure and heart rate was investigated by multiple regression analysis. Statistical analysis of the difference of the data obtained in age groups was made by the "Student's" t-distribution.