It is well known that autonomic response is the first human response to any intervention or to any physical, physiological, or psycho-emotional activity. Likewise, any pathological process will immediately provoke an ANS response. And the main regulatory mechanism in Heart Rate Variability (HRV) is autonomic regulation. Therefore, HRV method is unique in its ability to assess the impact of any intervention or activity and to detect the early signs of pathological developments or functional disorders, which may not be revealed by routine physical examination.
To perform Heart Rate Variability analysis, Nerve-Express uses an effective and transparent visual representation, known as the Method of Rhythmography, which reflects HRV wave structure and serves as a “fingerprint” of autonomic regulatory mechanisms. The method is based on drawing the time intervals between consecutive heartbeats as straight vertical lines. The longer the interval between two heartbeats (RR), the longer the corresponding vertical line.
When these lines are graphed sequentially, they form a Rhythmogram – a curve-specific wave portrait of RR Intervals Variability. Rhymographic Representation allows a great deal of information to be comprressed in a simple picture. The wave portrait is composed of 448 RR intervals of the ECG. A spectral analysis of this wave “portrait” allows Nerve-Express to identify two main spectral components.