HEART RATE VARIABILITY
AUTONOMIC NERVOUS SYSTEM HEART RATE VARIABILITY (HRV) is a well-established marker of autonomic nervous system function, both sympathetic and parasympathetic. The SYMPATHETIC NERVOUS SYSTEM prepares the body for stressful or emergency situations, that is, for fight or flight. Therefore, the sympathetic system increases the heart rate and the force of heart muscle contractions and widens […]
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