Open AccessSpectral characteristics of the internal jugular vein and central venous pressure pulses: a proof of concept study
Author(s) -
Clive Beggs,
Valentina Tavoni,
Erica Menegatti,
Mirko Tessari,
Riccardo Ragazzi,
Anna Maria Malagoni,
Luca Giovanardi
Publication year - 2021
Publication title -
veins and lymphatics
Language(s) - English
Resource type - Journals
ISSN - 2279-7483
DOI - 10.4081/vl.2021.9732
Subject(s) - central venous pressure , medicine , internal jugular vein , jugular vein , central venous catheter , cardiology , signal (programming language) , catheter , blood pressure , surgery , heart rate , computer science , programming language
In this proof-of-concept study the impact of central venous pressure (CVP) on internal jugular veins cross-sectional area (CSA) and blood flow time-average velocity (TAV) was evaluated in eight subjects, with the aim of understanding the drivers of the jugular venous pulse. CVP was measured using a central venous catheter while CSA variation and TAV along a cardiac cycle were acquired using ultrasound. Analysis of CVP, CSA and TAV time-series signals revealed TAV and CSA to lag behind CVP by on average 0.129 s and 0.138 s, with an inverse correlation between CSA and TAV (r= –0.316). The respective autocorrelation signals were strongly correlated (mean r=0.729-0.764), with mean CSA periodicity being 1.062 Hz. Fourier analysis revealed the frequency spectrums of CVP, TAV and CSA signals to be dominated by frequencies at approximately 1 and 2 Hz, with those >1 Hz greatly attenuated in the CSA signal. Because the autocorrelograms and periodograms of the respective signals were aligned and dominated by the same underlying frequencies, this suggested that they are more easily interpreted in the frequency domain rather than the time domain.