This 81 year old woman presents to her GP with blackouts lasting a few seconds. What does her ECG show? A Sinus rhythm with Mobitz I second degree (Wenckebach) AV block The ECG shows consistent p ...

The QRS complex is positive in lead I and negative in lead II and also negative in lead aVF – indicating left axis deviation TIP When you see RBBB always look for 1 st degree heart block and/or left ...

2:1 AV block is a form of second degree AV nodal block and occurs when every other P wave is not conducted through the AV node to get to the ventricles and thus every other P wave is NOT followed by a ...