Complete Heart Block
Types of heart block
First degree heart block
- PR interval > 0.2 seconds
Second degree heart block
- type 1 (Mobitz I, Wenckebach): progressive prolongation of the PR interval until a dropped beat occurs
- type 2 (Mobitz II): PR interval is constant but the P wave is often not followed by a QRS complex
Third degree (complete) heart block
- there is no association between the P waves and QRS complexes