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Heart Rate Variability Analysis Software

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ECG HRV data
Part #: ACKHRV

AcqKnowledge® software includes a fully-automated Heart Rate Variability analysis tool with flexible options for extracting a wide range of heart rate variability (HRV) and respiratory sinus arrhythmia (RSA) measures.

  • Extract HRV measures over user-defined areas of data, such as fixed time trials (“epochs,”) events and focus areas.
  • Obtain RSA measures using frequency-based HRV.
  • Automatically compute HRV using geometrical and statistical methods.
HRV analysis AcqKnowledge See More...

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Part #: ACKHRV
Categories: Software - Research
Subcategories: AcqKnowledge & Upgrades - Research

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 The algorithm conforms to the frequency domain algorithm guidelines as published by the European Heart Journal. For optimal results, follow these suggestions for Preparing HRV Data for Analysis.

  • There are two methods for extracting the RR intervals from the ECG signal:
    • A modified Pan-Tompkins QRS detector
    • Events located in the file – ECG QRS Peak event

ECG Events for HRV Analysis

  • The RR intervals are re-sampled to a continuous sampling rate in order to extract frequency information.
    • Cubic-spline interpolation is used to generate this continuous time-domain representation of the RR intervals.

HRV Interpolated Tachogram

  • The frequency information is extracted from the RR intervals and analyzed to produce standard ratios. Power sums are reported in units of sec2/Hz. A Welch periodogram is used to generate the Power Spectral Density (equivalent to Transform > Power Spectral Density).

 HRV Analysis PSD data

  • The software reports values for the typical HRV frequency bands, including: Very Low Frequency, Low Frequency, High Frequency, and Very High Frequency ranges. The analysis also includes values for the overall ratios: Sympathetic, Vagal and Sympathetic – Vagal balance. The ratio values and frequency band results can be plotted into a Journal file or exported for further analysis.

AcqKnowledge also inlcudes a Poincare plot option that will display either selected areas of the data, or the entire file. The Poincare plot is an X/Y plot of the RR intervals in seconds. One axis displays the RR interval and the other axis displays the interval delayed by one beat.

HRV Analysis Poincare Plot

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