What is the Origin of Respiratory Sinus Arrhythmia Modulation?

RSA is a direct physiological phenomenon where heart rate speeds up during inspiration and slows during expiration. Modulation implies the conscious or unconscious alteration of this inherent rhythm. This concept is central to understanding the neural control of cardiac function.

What is the Mechanism of Respiratory Sinus Arrhythmia Modulation?

RSA is driven by the rhythmic afferent input from pulmonary stretch receptors traveling via the vagus nerve to the cardiovascular control centers in the medulla. Slow, deep breathing maximizes this vagal input, thereby increasing the high-frequency power component of HRV. Effective modulation dampens sympathetic outflow during expiration, facilitating cardiac rest and promoting systemic recovery states essential for hormonal balance.

Respiratory Sinus Arrhythmia Modulation ∞ Area

Respiratory Sinus Arrhythmia Modulation

Meaning

Respiratory Sinus Arrhythmia (RSA) Modulation refers to the intentional influence exerted upon the naturally occurring variation in heart rate that accompanies the breathing cycle, specifically enhancing the magnitude of this variation. Strong RSA signifies robust vagal influence on the heart and superior cardiovascular adaptability. Modulation techniques aim to increase the difference between heart rate during inhalation and exhalation.