dyspnea on exertion differentialexertion scaleprogressive dyspnea on exertiondyspnea with minimal exertiondefine dyspnea on exertionchronic exertional dyspneadyspnea on exertion meaningrate of perceived exertion scaleperceived exertionmild dyspnea on exertionomni scale of perceived exertionborg scale of perceived exertion
