title: Cardiovascular response to acute stress in freely moving rats: time-frequency analysis.
abstract: Spectral analysis of cardiovascular series is an important tool for assessing the features of the autonomic control of the cardiovascular system. In this experiment Wistar rats ecquiped with intraarterial catheter for blood pressure (BP) recording were exposed to stress induced by blowing air. The problem of non stationary data was overcomed applying the Smoothed Pseudo Wigner Villle (SPWV) time-frequency distribution. Spectral analysis was done before stress, during stress, immediately after stress and later in recovery. The spectral indices were calculated for both systolic blood pressure (SBP) and pulse interval (PI) series. The time evolution of spectral indices showed perturbed sympathovagal balance.
authors.affiliation: Faculty of Technical Sciences, University of Novi Sad, Serbia. tatjana.turukalo@ktios.net
authors.forename: Tatjana
authors.initials: T
authors.lastname: Loncar-Turukalo
authors.forename: Dragana
authors.initials: D
authors.lastname: Bajic
authors.forename: Nina
authors.initials: N
authors.lastname: Japundzic-Zigon
mesh_terms: D000465:Algorithms; D000818:Animals; D002320:Cardiovascular Physiological Phenomena; D001330:Electronic Data Processing; D006339:Heart Rate / Q000187:drug effects / Q000502:physiology*; D008297:Male; D015233:Models, Statistical; D051381:Rats; D017208:Rats, Wistar; D012815:Signal Processing, Computer-Assisted; D013312:Stress, Physiological; D013315:Stress, Psychological; D013997:Time Factors