Stepwise interpretation of ECG

ID 380 – Normal ECG

ID 380 – 53 year old man in the pre-anaesthesia clinic

ID 380 – 53 year old man in the pre-anaesthesia clinic

Can you see P waves?

Yes: The P waves originate from the sinus node– The rhythm is regular – Each P is followed by a QRS - The PR interval is normal – The rate is 60/minNORMAL SINUS RHYTHM, 60/min

ID 380 – 53 year old man in the pre-anaesthesia clinic

There are no signs of left atrial enlargement or right atrial enlargement

ID 380 – 53 year old man in the pre-anaesthesia clinic

Let’s now look at the QRS complexes: There is normal QRS axis (between 0 and 90 degrees)

ID 380 – 53 year old man in the pre-anaesthesia clinic

The QRS duration is normal : There is no right bundle branch block, left bundle branch block or non-specific block

ID 380 – 53 year old man in the pre-anaesthesia clinic

There is no right ventricular hypertrophy or left ventricular hypertrophy

ID 380 – 53 year old man in the pre-anaesthesia clinic

There are no QRS signs of myocardial infarction – There are normal ST segment and normal T waves

ID 380 – 53 year old man in the pre-anaesthesia clinic

ID 380 – Final diagnosis: NORMAL SINUS RHYTHM, 60 bpm. NORMAL ECG