preferred_name: Regurgitant blood duration of 1 to 3 meters per second flow velocity
preferred_name_lc: regurgitant blood duration of 1 to 3 meters per second flow velocity
label: Regurgitant blood duration of 1 to 3 meters per second flow velocity
label_lc: regurgitant blood duration of 1 to 3 meters per second flow velocity