Changes in the linear relationship between cardiovascular parameters and neural sympathetic discharge variability before orthostatic syncope

Franca Barbic, Karsten Heusser, Wolfram Sies, Judith Buehlmeier, Peter Gauger, Tito Bassani, Jens Tank, Jens Jordan, André Diedrich, David Robertson, Franca Dipaola, Sara Achenza, Antonio Roberto Zamuner, Alberto Porta, Raffaello Furlan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

To evaluate the cardiovascular parameters spontaneous fluctuations and neural sympathetic discharge variability relationship during the gravitational stimulus, seven healthy males underwent ECG, blood pressure, respiratory and post-ganglionic sympathetic discharge activity (MSNA) recordings. Data were recorded at rest and during a 15-minute 80°head-up tilt followed by a step wise lower body negative pressure increase up to the onset of presyncope. Spectral and coherence analyses of systolic arterial pressure (SAP) and MSNA variability provided the indexes of vessels sympathetic modulation in the low frequency (LF) band, LFSAP, and of the coupling between MSNA and SAP at LF, K2 MSNA-SAP(LF), during asymptomatic (T1) and presyncope (T2) periods of tilt. During T2, RR interval, SAP, LFmsna, LF SAP and K2 MSNA-SAP(LF) values decreased compared to T1. in the presence of unchanged MSNA values. This result suggests that a significant coupling between SAP and MSNA variability in the 0.1 Hz band is mandatory for a proper orthostatic tolerance.

Original languageEnglish
Title of host publication2014 8th Conference of the European Study Group on Cardiovascular Oscillations, ESGCO 2014
PublisherIEEE Computer Society
Pages81-82
Number of pages2
ISBN (Print)9781479939695
DOIs
Publication statusPublished - 2014
Event2014 8th Conference of the European Study Group on Cardiovascular Oscillations, ESGCO 2014 - Trento, Italy
Duration: May 25 2014May 28 2014

Other

Other2014 8th Conference of the European Study Group on Cardiovascular Oscillations, ESGCO 2014
CountryItaly
CityTrento
Period5/25/145/28/14

ASJC Scopus subject areas

  • Biomedical Engineering

Fingerprint Dive into the research topics of 'Changes in the linear relationship between cardiovascular parameters and neural sympathetic discharge variability before orthostatic syncope'. Together they form a unique fingerprint.

Cite this