Pacemaker Placement Indications Class I: • Third degree block • Advanced 2nd degree block • Symptomatic Mobitz I or II • Mobitz II + wide QRS • Exercise induced 2nd or 3rd degree block Class II: • Mobitz II + narrow QRS • First degree AV block + hemodynamic compromise • Bi/Tri-fascicular block with syncope • Alternating RBBB/LBBB with syncope Class Ill: • Syncope of unclear origin • Sinus brady/arrest, prolonged PR, Mobitz I without symptoms • RBBB + LaFB without sx/syncope • Reversible causes of AV block - BWH Medicine Residency @BrighamMedRes #Pacemaker #Placement #Indications #PPM #cardiology #management