The ECGĀ Blog with Reid
The Physiology of Respiratory Sinus Arrhythmia
Jan 17, 2025
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Respiratory sinus arrhythmia (RSA) is a common and normal ECG finding that reflects the intricate interplay between the respiratory cycle and heart rate. It is most pronounced in young, healthy individuals and is considered a marker of cardiac vagal tone and autonomic nervous system flexibility. Thi...