2622370 ECFV extracellular fluid volume 137 2622376 ECFV ECF volume 1 2622375 ECFV ECFV Predicted 1 2622374 ECFV ECFVBird 1 2622372 ECFV electrode distance, gives information about the state of hydration 1 2622371 ECFV epicardial fat volume 1 2622373 ECFV extracellular fluid volume expansion 1