I had a patient the other night who had a dysrhythmia. Irregular timing, irregular PSV. Some big "catch up" beats. I had let the machine "High Q" calculate the (avg'd) velocity. Few days later had conversation (counseling) with co-worker who said, Always take highest, that's what we were taught. I think she is harkening back to highest velocity in any segment, not The catch up beat... Doesnt quite feel right. Help? ( I already searched Flownet, but only found discussion specific to BP and tachy a fib. ) Karen RVT To unsubscribe or search other topics on UVM Flownet link to: http://list.uvm.edu/archives/uvmflownet.html