What is respiratory sinus arrhythmia?
|What is respiratory sinus arrhythmia?
Heart rate increases in inspiration (breathing in) and decreases in expiration (breathing out). This can be accurately identified while monitoring the pulse rate / ECG. The output of the left ventricle is lower in inspiration. This triggers a compensatory increase in heart rate. The reverse occurs in expiration. This change is known as respiratory sinus arrhythmia.