Recognition
- • 1°: PR >200 ms
- • 2° Mobitz I: progressive PR prolongation → dropped beat
- • 2° Mobitz II: fixed PR with dropped beats
- • 3°: AV dissociation
Key findings
- • Narrow vs wide escape
- • Site: AV node (Wenckebach) vs infranodal (Mobitz II / 3°)
Clinical importance
- • Mobitz II and complete heart block need pacing
Management pearls
- • Atropine 0.5 mg IV (nodal disease)
- • Transcutaneous pacing
- • Adrenaline/dopamine infusion
- • Transvenous → permanent pacemaker
