Volume 103, Issue 5, Pages 1343-1347 (May 1993) 24-Hour Ambulatory Blood Pressure Variability in Obstructive Sleep Apnea Syndrome Akiko Noda, M.T., Tamotsu Okada, M.D., Hiroshi Hayashi, M.D., Fumihiko Yasuma, M.D., Mitsuhiro Yokota, M.D. CHEST Volume 103, Issue 5, Pages 1343-1347 (May 1993) DOI: 10.1378/chest.103.5.1343 Copyright © 1993 The American College of Chest Physicians Terms and Conditions
Figure 1 Three types of 24-h blood pressure variability. BP = blood pressure; AI = apnea index; time of SaO2 <90 percent = duration with SaO2 below 90 percent; HI = hyperbolic index; SYS = systole; DIA = diastole. CHEST 1993 103, 1343-1347DOI: (10.1378/chest.103.5.1343) Copyright © 1993 The American College of Chest Physicians Terms and Conditions
Figure 2 The 24-h blood pressure variability by periodic regression analysis. SBP = systolic blood pressure; DBP = diastolic blood pressure. CHEST 1993 103, 1343-1347DOI: (10.1378/chest.103.5.1343) Copyright © 1993 The American College of Chest Physicians Terms and Conditions
Figure 3 Relationships between sleep parameters and 24-h BP pattern (types 1, 2, and 3) in OSAS. Time of SaO2 <90 percent = duration with SaO2 below 90 percent; ns = not significant. CHEST 1993 103, 1343-1347DOI: (10.1378/chest.103.5.1343) Copyright © 1993 The American College of Chest Physicians Terms and Conditions
Figure 4 Correlation between sleep parameters and difference (ΔSBP) between mean waking BP and mean sleep BP SBP = systolic blood pressure; ΔSBP = the difference between mean waking SBP and mean sleep SBP; time of SaO2 <90 percent = duration with SaO2 below 90 percent. CHEST 1993 103, 1343-1347DOI: (10.1378/chest.103.5.1343) Copyright © 1993 The American College of Chest Physicians Terms and Conditions