Heart Rate Variability
Measuring Heart Rate Variability with the Actiheart
The Actiheart is ideally suited for Heart Rate Variability (HRV) and Inter-beat Interval (IBI) measurements in ambulatory settings. The Actiheart can record IBI with 1mS resolution for 440,000 beats (approx. 3.5 days @ 76bpm). The data is transferred to the Actiheart software which performs the Heart Rate Variability analysis. The statistics calculated by the Actiheart software are based on 'Heart Rate Variability, Standards of Measurement, Physiological Interpretation and Clinical Use.' Task Force of the European Society of Cardiology and the North American Society of Pacing and Electrophysiology. Some selected statistics include:
|IBI Ave:||Average Inter-beat Interval (IBI) for the analysis epoch|
|IBI Min, IBI Max:||Minimum and maximum IBI in the epoch|
|SD:||Standard Deviation of the IBI data|
|LF & HF:||The low and high frequency component of the IBI, derived using an FFT|
|Histogram:||Occurrence distribution of IBI intervals|
How does it work?
The Actiheart is worn on either two standard ECG pads on the chest or on a belt similar to a Polar wearlink belt. For more information please see the page on wearing the Actiheart.
How is the data displayed?
Data can be displayed in a number of different ways and some examples are given below:
Example Heart Rate Variability and IBI analysis window from Actiheart Software
Data can also be exported for use in third party programs such as SAS and SPSS. An example of exported data is shown below: