Normal sinus rhythm 3rd degree AV block (complete heart block ... bradycardia (can be junctional, atrial fibrillation or higher grade AV blocks as in this ECG), artifact from shivering and ...

This is different than a first-degree atrioventricular ... block occurs when no SA nodal action potentials are able to leave the SA node. No P waves are seen on the ECG. When a junctional escape ...