electrocardiogram: left bundle branch block rSR' rSR' or broad slurred R wave in leads V4, V5, and V6
electrocardiogram: left bundle branch block rsr' rsr' or broad slurred r wave in leads v4, v5, and v6
electrocardiogram LBBB rSR' rSR' or broad slurred R. wave in V4, V5 & V6
electrocardiogram lbbb rsr' rsr' or broad slurred r. wave in v4, v5 & v6