The top part of the screen shows the instantaneous spectral curve whereas the lower part shows the instantaneous heart rate. This is of particular importance to those concerned with the immediate effects of medication or the effects for physiotherapists of stress relief, bio-feedback and toxic chemicals on the functioning of the heart as well as for cardiologists.

This display is also of particular interest to pharmacologists and pharmaceutical companies.

It is also important for those involved with stress management as you are able to instantly see the effects of psychological changes to heart rate variability.