A system and apparatus implementing a graphical user interface for displaying
heart
rate information is provided. The graphical user interface displays, in a first
viewing window, a first tracing indicative of a heart rate signal. The graphical
user interface displays a control allowing a user to select a portion of the first
tracing. In a second viewing window displayed simultaneously with the first viewing
window, the graphical user interface displays a second tracing which is a zoomed
in view of the selected portion of the first tracing. In a specific implementation,
the control includes a selection box having a transparent portion superposed upon
the first viewing window. The portion of the first tracing viewable through the
transparent portion corresponds to the second tracing. The control allows the user
to displace and modify the size of the selection box to select a portion of the
first tracing.
