Apical 3-Chamber (A3C) View - Regional Wall Anatomy on POCUS Echocardiogram The apical 3-chamber has essentially the same configuration as the parasternal long axis. Because you can see the aortic valve, the septal portion must be anterior. The opposing wall is infero-lateral (As seen in PLAX). Alberta Sono @UAlberta_Sono #A3C #Regional #Wall #Anatomy #POCUS #Echocardiogram #clinical #cardiology #labeled