respiratory sinus arrhythmia


Also found in: Acronyms, Wikipedia.

respiratory sinus arrhythmia (resˑ·p·tōˈ·rē sīˑ·ns ·rithˑ·mē·),

n the cyclical change in heart rate that occurs in correspondence with breathing rhythm; can be used as an indicator of health. The dampening or absence of RSA may indicate stress or heart damage.
Mentioned in ?