Poincare plots can easily be created using the Ponemah Customer Derived Parameter feature.
Please note, Custom Derived Parameter is available in Ponemah 5.x series v5.40 and later.
To create a Poincare Plot:
- Open data using Ponemah Review
- Create the RR-1 (n+1) parameter
- Select Setup | Custom Derived Parameter
- Click Add New button
- Enter Name: RRnext
- Select Parent Algorithm: ECG
- Select Averaging: Mean
- Enter Unit: ms
- Ignore Matching Type
- Enter Expression: [RR-I(1)]
- (1) indicates the system should report the next cycle
- (-1) could be used to have the system report the previous cycle
- Click Update button
- Click OK
- Create Scatter Plot of RR-1(N+1) vs RR-I
- Select Setup | P3Setup
- Select Graph Setup
- Select an unused graph page
- Enable the graph page by clicking (checking) the associated checkbox
- Select Scatter using the Type dropdown
- Define X axis:
- Select ECG channel for Input
- Select RR-I for Parameter
- Enter Label RR-I
- Define Y axis:
- Select ECG channel for Input
- Select RRnext for Parameter
- Enter Label RRnext
- Click OK
- Navigate to the generate graph page
- Double-click the graph pane and select AutoScale
- To include the RRnext parameter in the Excel output upon saving the mark section, it must first be enabled/added to the Derived List View.
- Select Setup | P3Setup
- Select Channel Input Setup
- Select the ECG channel(s) desired
- Select Derived Parameters button
- Ensure RR-1 is enabled, if not check the box to enable it
- Check the checkbox associated with RRnext
- Click OK
- Click OK
- Select Functions | Save Marks Section
- Enter a unique Mark Section name and ensure Save Derived Data checkbox is enabled
- Click OK
- Navigate to the Ponemah Data folder to obtain Excel file with RR-I and RRnext parameter data available for further processing
Note: further analysis for SD1 and SD2 calculations may be performed from the data in the Excel output.
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