Stepwise interpretation of ECG

ID 122

Atrial Flutter

ID 122 – 50 year old man complaining of palpitation

ID 122 – 50 year old man complaining of palpitation

Can you see P waves?

ID 122 – Atrial flutter with variable AV block – Ventricular rate 107/min.

We can see typical waves of atrial flutter with variable AV block – ventricular rate = 107/min.

ID 122 – Atrial flutter with variable AV block – Ventricular rate 107/min.

Let’s now look at the QRS complexes: The QRS complex is positive in I and its average is slightly positive or isoelectric in aVF – The QRS is normal

ID 122 – Atrial flutter with variable AV block – Ventricular rate 107/min.

The QRS duration is normal – There are no signs of right or left bundle branch block Or nonspecific block

ID 122 – Atrial flutter with variable AV block – Ventricular rate 107/min.

There no signs of right or left ventricular hypertrophy

ID 122 – Atrial flutter with variable AV block – Ventricular rate 107/min.

The QRS shows no signs of myocardial infarction

ID 122 – Atrial flutter with variable AV block – Ventricular rate 107/min.

Because of the saw-like waves of atrial flutter, it is difficult to assess the T waves in theInferior leads and V6. In the other leads the T waves are normal.

ID 122 - Final diagnosis - Atrial flutter with variable AV block – Ventricular rate 107/min.

Because of the saw-toothed waves of atrial flutter, it is difficult to assess the T waves in theinferior leads and V6. In the other leads the T waves are normal.