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Original Article
Decreased Nonlinear Coupling of Peripheral Blood Volume to Heart Rate in Preterm Infants
Eun-Young Park, Chang-Ryul Kim, Myung-Kul Yum
Clin Exp Pediatr. 2004;47(4):386-391.   Published online April 15, 2004
Purpose : We investigated the autonomic nervous and complex modulation of heart rate and peripheral blood volume, and linear and nonlinear coupling between heart rate and peripheral blood volume in full-term and preterm infants. Methods : In twenty healthy preterm infants and twenty full-term infants at postconceptional age of 30-37 and 38-41 weeks each, we recorded electrocardiogram and photoplethysmogram simultaneously during...