KB0068: Second-by-Second Heart Rate Using Intervals

It is possible to determine second-by-second heart rate values using Interval mode in the Heart Rate Variability analysis application.  Interval mode can be enabled by navigating to the HRV Calibration Settings tab and changing the Calculation Method to Interval Interval mode allows you to split a given segment into smaller “intervals”, for […]

All About Cardiac Impedance Part 5: Data Editing

Select analysis version to view the applicable content: Now that we have talked about meaningful statistics in impedance cardiography and how they are calculated, we need to take a step back and make sure the data are clean and free of artifact. There are two steps for editing in impedance cardiography – […]

All About Cardiac Impedance Part 1: Introduction to Cardiac Impedance

All About Cardiac Impedance Cardiac impedance is a measurement of the mechanical activation of the heart. By recording cardiac impedance in conjunction with the electrical activation of the heart, the electrocardiogram (ECG), we can gain insight into sympathetic nervous system influence through measures such as Pre-Ejection Period, Stroke Volume, and Cardiac […]

KB0067: Scaling Skin Temperature to Degrees

The typical skin temperature probe used with MindWare systems requires a modified Transducer BioNex module to use.  As with all transducers, the data will initially be displayed in volts. To scale this data to degrees (Fahrenheit or Celsius)  you need to apply a known scaling equation in either BioLab or the Basic […]

KB0066: Scaling Cardiac Impedance to Ohms

Cardiac impedance is typically measured in ohms. It’s derivative, dZ/dt, is measured in ohms per second. This article will discuss the various ways of scaling data from volts to these more appropriate units in BioLab and the IMP Analysis application. If you are acquiring data with a MindWare Mobile, this […]