The Institute of Environmental Physiology, jointly with Yu. N. Semenov (Ramena, Ryazan), have developed a method for biological control over the parameters of heart rhythm variability using a Varicard 2.51 complex for cardiac intervalogram processing controlled with the ISCIM 6.1 (Build 2.8) software. The method is used for correction of mental, neuronal and vascular disturbances of man and is based on the biological feedback principle. Heart variability rhythm parameters serve as controllable indicators that reflect the balance of sympathetic and vagal functions of the cardiac activity regulation.

KEY ADVANTAGES: Financial availability of Varicard equipment; a human-engineered interface of the software that allows the biocontrol  method to be manageable by biologists, physiologists, and physicians; adjustment of all statistical parameters of heart variability rhythm as controllable indicators; portability (the possibility of operation in the field

conditions). Varicard has deserved long-term reputation in academic circles and scientific community as the standardized software for registration and mathematical processing of electric cardiac signals during estimation of autonomic heart rhythm regulation.

Stress index before (A) and after (B) the biocontrol session