P-Wave Dispersion as a Simple Tool for Screening Childhood Obstructive Sleep Apnea Syndrome

“P-wave dispersion (PWD) as defined by the difference between the duration of maximum and minimum p-waves has been used to screen for the presence of OSAS in adults. This study looks at the utility of this tool for OSAS screening in children. The authors obtained ECGs from 77 children with documented OSAS by PSG and 44 controls. A cutoff of 26.5 ms provided 89.6% sensitivity and 61.4% specificity. PWD was significantly higher in children with severe OSA even when the authors adjusted for the presence of obesity.”