private void MenuSelectInputSource(object sender, RoutedEventArgs e)
        {
            Lead.Values selectedValue;
            if (!Enum.TryParse <Lead.Values> (((MenuItem)sender).Name, out selectedValue))
            {
                return;
            }

            Strip.SetLead(selectedValue);
            Strip.Reset();
            Strip.Add_Beat__Cardiac_Baseline(App.Patient);
            Strip.Add_Breath__Respiratory_Baseline(App.Patient);

            CalculateOffsets();
            UpdateInterface(null, null);
        }