Biofeedback Therapy System

The 5500XLS Biosound Healing Therapy System integrates a user friendly HRV Heart Rate Variability biofeedback program that teaches patients simple techniques to manage their emotions. The biofeedback therapy system has different challenge levels and games to help the patient achieve higher levels of coherence. Physiological coherence is a balance between the sympathetic (fight or flight) nervous system and the parasympathetic nervous system, many athletes call this “being in the zone”.

5500XLS Therapy System

Why is HRV Important?

Scientists and physicians consider HRV to be an important indicator of health and fitness.  As a marker of physiological resilience and behavioral flexibility, it reflects our ability to adapt effectively to stress and environmental demands.  HRV is also a marker of biological aging.  Our heart rate variability is greatest when we are young, and as we age the range of variation in our resting heart rate becomes smaller. Although the age-related decline in HRV is a natural process, having abnormally low HRV for one’s age group is associated with increased risk of future health problems and premature mortality.  Low HRV is also observed in individuals with a wide range of diseases and disorders.  By reducing stress-induced wear and tear on the nervous system and facilitating the body’s natural regenerative processes, regular practice of HeartMath coherence-building techniques can help restore low HRV to healthy values.


When we experience uplifting emotions such as appreciation, joy, care, and love; our heart rhythm pattern becomes highly ordered, looking like a smooth, harmonious wave (an example is shown in the figure below). This is called a coherent heart rhythm pattern. When we are generating a coherent heart rhythm, the activity in the two branches of the Autonomic Nervous System is synchronized and the body’s systems operate with increased efficiency and harmony. It’s no wonder that positive emotions feel so good – they actually help our body’s systems synchronize and work better. These graphs show examples of real-time heart rate variability patterns (heart rhythms) recorded from individuals experiencing different emotions. The incoherent heart rhythm pattern shown in the top graph, characterized by its irregular, jagged waveform, is typical of stress and negative emotions such as anger, frustration, and anxiety. The bottom graph shows an example of the coherent heart rhythm pattern that is typically observed when an individual is experiencing a sustained positive emotion, such as appreciation, compassion, or love. The coherent pattern is characterized by its regular, sine-wave-like waveform.

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