is_about cardiovascular system cardiovascular measurement early cardiac repolarization measurement true Early repolarization pattern (ERP) is a common ECG variant, characterized by J point elevation manifested either as terminal QRS slurring (the transition from the QRS segment to the ST segment) or notching (a positive deflection inscribed on terminal QRS complex) associated with concave upward ST-segment elevation and prominent T waves in at least two contiguous leads. Helen Parkinson http://circ.ahajournals.org/content/124/20/2185