The AHA Guidelines and Scientifi c Statements Handbook
Table 3.6Recommendations for treatment of atrioventricular and intraventricular conduction disturbances during STEMIAtrioventricular conductionIntraventricular conductionNormalFirst degree AV blockMobitz I second degree AV blockMobitz II second degree AV blockAnterior MINon-anterior MIAnterior MINon-anterior MIAnterior MINon-anterior MINormalActionClassActionClassActionClassActionClassActionClassActionClassActionClassObserveA TCTVI III III IIIObserveA TCTVI III IIbIIIObserveA TCTVI III IIbIIIObserveA*TCTVIIbIII I IIIObserveA TCTVIIaIII I IIIObserveA TCTVIII III I IIaObserveA TCTVIII III I IIaOld or New fascicular block (LAFB or LPFB)ObserveA TCTVI III IIbIIIObserveA TCTVIIbIII I IIIObserveA TCTVIIbIII IIaIIIObserveA*TCTVIIbIII I IIIObserveA TCTVIIbIII I IIIObserveA TCTVIII III I IIaObserveA TCTVIII III I IIbOld bundle branch blockObserveA TCTVI III IIbIIIObserveA TCTVIII III I IIbObserveA TCTVIII III I IIbObserveA*TCTVIII III I IIbObserveA TCTVIII III I IIbObserveA TCTVIII III I IIaObserveA TCTVIII III I IIaNew bundle branch blockObserveA TCTVIII III I IIbObserveA TCTVIII III I IIaObserveA TCTVIII III I IIaObserveA*TCTVIII III I IIaObserveA TCTVIII III I IIaObserveA TCTVIII III IIbIObserveA TCTVIII III IIbI