Phenomena and Processes [G] » Circulatory and Respiratory Physiological Phenomena [G09] » Cardiovascular Physiological Phenomena » Hemodynamics » Heart Rate » Respiratory Sinus Arrhythmia
A naturally occurring variation in heart rate that occurs during a BREATHING cycle, where the time between heartbeats is shortened during inspiration and prolonged during expiration. It is not the same as SINUS ARRHYTHMIA, the disorder. MeSH
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