How To Interpret an ECG/EKG

Here are most important features to analyze on every ECG

1. Heart Rate
2. Rhythm
3. PR interval
4. P wave Size
5. QRS width/Interval
6. QT interval
7. QRS Voltage
8. Mean QRS electrical Axis
9. R wave progression in Chest Leads
10. Abnormal Q waves 
11. ST Segments
12. T waves
13. U waves