ECG is the abbreviation of general ECG. The normal general range of ECG is referenced as follows: 1. The normal sinus heart rate is between 60-100 beats/min; 2. The normal PR interval of ECG is between 120-200ms; 3. The normal QRS width of ECG is between 60-100ms; 4. The normal QT interval of ECG is between 340-430ms; 5. The normal ST segment range of ECG is between -0.05-0.3mv; 6. The normal amplitude of P wave is less than or equal to 0.25mv and width is less than or equal to 0.11s; 7. The QRS wave group is more complex and is generally considered to be between 0.5-2mv.