USER'S GUIDE - Biosignal Analysis and Medical Imaging Group

4.2. The user interface 40Figure 4.8: The results view segment of the user interface: frequency-domain results viewselected.Figure 4.9: The results view segment of the user interface: nonlinear results view selected.Y-limits. If common Y-limit is selected, it can also be entered manually into the edit boxbelow the selection button. The selected power axis options apply also for the report sheet.The results for both spectra are displayed in tables below the corresponding spectrum axes.The nonlinear results view shown in Fig. 4.9 displays all the calculated nonlinear variablesin one table. All the variables are calculated from the original non-detrended RR series.The Poincaré plot and the DFA results are also presented graphically in the two axes. In thePoincaré plot (left hand axis), the successive RR intervals are plotted as blue circles and theSD1 and SD2 variables obtained from the ellipse fitting technique are presented (for detailssee Section 3.3.1). In the DFA plot (right hand axis), the detrended fluctuations F (n) arepresented as a function of n in a log-log scale and the slopes for the short term and longterm fluctuations α 1 and α 2 , respectively, are indicated (for details see Section 3.3.4).The time-varying results view shown in Fig. 4.10 displays the time-varying trend of theselected variable. The variable is selected using the two buttons on the lower left handcorner of the view. Selectable variables are divided into time-domain, frequency-domain,and nonlinear categories. The trend of the selected variable will appear immediately inthe axis. The line style of the trend can be changed by pressing the button on the right-Kubios HRV Analysisversion 2.0 betaBiosignal Analysis and Medical Imaging GroupDepartment of PhysicsUniversity of Kuopio, FINLAND