in patients with severe sleep apnea , mean apnea index was 53 +/- 11 , and supine vo2 was 141 +/- 40 ml/min/m2 , whereas with leg elevation it rose to 163 +/- 41 ml/min/m2 ( p less than 0.005 ) .
C0037315
sleep apnea
C0003578
apnea