Abstract
Importance of Sinus Arrhythmia and Artifact. Clinical Interpretation of Abnormal ECG Patterns in the Absence of Heart Disease
Highlights
Respiratory sinus arrhythmia (RSA) an index of parasympathetic nervous system (PNS) mediated cardiac control
RSA is the high frequency component of heart rate variability, and is a measure of the magnitude of the rhythmic fluctuations in heart rate across the respiratory cycle which is characterized by increasing heart rate during inhalation and decreasing heart rate during exhalation
RSA is mainly determined by vagal influences on the heart, and provides an index of parasympathetic activity [1]
Summary
Respiratory sinus arrhythmia (RSA) an index of parasympathetic nervous system (PNS) mediated cardiac control. RSA is the high frequency component of heart rate variability, and is a measure of the magnitude of the rhythmic fluctuations in heart rate across the respiratory cycle which is characterized by increasing heart rate during inhalation and decreasing heart rate during exhalation. RSA is mainly determined by vagal influences on the heart, and provides an index of parasympathetic activity [1]
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