title: Nonlinear heart rate variability measures under electromagnetic fields produced by GSM cellular phones.
abstract: This study was designed to assess the nonlinear dynamics of heart rate variability (HRV) during exposure to low-intensity EMFs. Twenty-six healthy young volunteers were subjected to a rest-to-stand protocol to evaluate autonomic nervous system in quiet condition (rest, vagal prevalence) and after a sympathetic activation (stand). The procedure was conducted twice in a double-blind design: once with a genuine EMFs exposure (GSM cellular phone at 900 MHz, 2 W) and once with a sham exposure (at least 24 h apart). During each session, three-lead electrocardiograms were recorded and RR series extracted off-line. The RR series were analyzed by nonlinear deterministic techniques in every phase of the protocol and during the different exposures. The analysis of the data shows there was no statistically significant effect due to GSM exposure on the nonlinear dynamics of HRV.
authors.affiliation: Consiglio Nazionale delle Ricerche, Istituto di Ingegneria Biomedica ISIB CNR, Milan, Italy. marta.parazzini@polimi.it
authors.forename: Marta
authors.initials: M
authors.lastname: Parazzini
authors.forename: Paolo
authors.initials: P
authors.lastname: Ravazzani
authors.forename: György
authors.initials: G
authors.lastname: Thuroczy
authors.forename: Ferenc B
authors.initials: FB
authors.lastname: Molnar
authors.forename: Gianluca
authors.initials: G
authors.lastname: Ardesi
authors.forename: Alessio
authors.initials: A
authors.lastname: Sacchettini
authors.forename: Luca Tommaso
authors.initials: LT
authors.lastname: Mainardi
mesh_terms: D000328:Adult; D040421:Cell Phone; D004574:Electromagnetic Fields / Q000009:adverse effects*; D005260:Female; D064368:Healthy Volunteers; D006339:Heart Rate / Q000528:radiation effects*; D006801:Humans; D008297:Male; D017711:Nonlinear Dynamics; D011187:Posture; D012146:Rest / Q000502:physiology; D055815:Young Adult