Third Degree AV block

Third Degree (complete block): - No impulse conduction from atria to ventricles, - hence independent atrial and ventricular rates - AV dissociation: no relationship between A-V complexes -QRS: If Narrow- indicates ventricular pacemaker at that level of AV node / If Broad (>120ms)- pacemaker below AV node - PERMANENT PACEMAKER to prevent mortality & reduce morbidity from Morgangni-Adams-Stokes attacks