Correlation of Plethysmograph Estimate of Pulsus Paradoxus with %FEV1 and Airway Resistance at baseline. Horizontal axes in each panel are plethysmograph estimates of pulsus paradoxus (PEP) expressed as %. Vertical axes are percent predicted values for FEV1 and airway resistance (ages 5 to 10 years) and absolute value (kPa/L/s) for airway resistance (ages 11 to 17 years).
Arnold et al. BMC Pulmonary Medicine 2010 10:17 doi:10.1186/1471-2466-10-17