1. Stepwise interpretation of ECG
ID 352

2. ID 352 –62 year old man with palpitation

3. ID 352 –62 year old man with palpitation
Can you see P waves?

4. Yes – There is sinus rhythm with premature atrial complexes (the P waves marked by an arrow)
Every 3rd
P is premature (trigeminy) - The sinus P waves show no evidence of right or left atrial enlargement
ID 352 - Sinus rhythm, 83/ min., with atrial premature complexes in a pattern of trigeminy

5. ID 352 – Sinus rhythm, 83/ min., with atrial premature complexes in a pattern of trigeminy
Let’s now look at the QRS complexes: There is normal QRS axis (between 0 and 90 degrees)

6. The QRS duration is normal : There is no right bundle branch block, left bundle branch block or non-specific block
ID 352 - Sinus rhythm, 83/ min., with atrial premature complexes in a pattern of trigeminy

7. ID 352 - Sinus rhythm, 83/ min., with atrial premature complexes in a pattern of trigeminy
There is no right ventricular hypertrophy or left ventricular hypertrophy

8. - Sinus rhythm, 83/ min., with atrial premature complexes in a pattern of trigeminy
There are no QRS signs of myocardial infarction –There are normal ST segment and normal T waves

9. ID 352 - Final diagnosis:
Sinus rhythm, 83/ min., with atrial premature complexes in a pattern of trigeminy
Otherwise, a normal ECG

10. ID 352 - Final diagnosis:
Sinus rhythm, 83/ min., with atrial premature complexes in a pattern of trigeminy
Otherwise, a normal ECG