Evaluation of ventricular-arterial coupling by impedance cardiography in healthy volunteers.
Journal
Physiological measurement
ISSN: 1361-6579
Titre abrégé: Physiol Meas
Pays: England
ID NLM: 9306921
Informations de publication
Date de publication:
02 12 2019
02 12 2019
Historique:
pubmed:
28
10
2019
medline:
26
6
2020
entrez:
26
10
2019
Statut:
epublish
Résumé
The interplay between cardiac function and the arterial system is currently defined as ventricular-arterial coupling (VAC) and it is an expression of global cardiovascular efficiency. VAC involves a variety of complex interactions between the heart and the vasculature. A basic index of VAC is the ratio of effective arterial elastance (Ea)/ end-systolic elastance (Ees). While this is often done with echocardiography, obtaining Ea/Ees using impedance cardiography is feasible, although this possibility has not been explored so far. The aim of this study was to compare the Ea/Ees values obtained using echocardiography and impedance cardiography. Two independent operators estimated Ea/Ees in 91 (41 ± 14 years old, women 51%) untreated apparently healthy individuals using (1) Doppler echocardiography with the single-beat method developed by Chen et al (2001 J. Am. Coll. Cardiol. 38 2028-34); and (2) data provided by impedance cardiography. The differences between Ea/Ees values were compared and correlation between both methods was estimated. Although Ea and Ees values calculated by impedance cardiography were lower than those estimated by echocardiography (-0.201 ± 0.457 mmHg ml In healthy individuals, estimation of Ea/Ees by impedance cardiography yielded similar values to those obtained using echocardiography.
Sections du résumé
BACKGROUND
The interplay between cardiac function and the arterial system is currently defined as ventricular-arterial coupling (VAC) and it is an expression of global cardiovascular efficiency. VAC involves a variety of complex interactions between the heart and the vasculature. A basic index of VAC is the ratio of effective arterial elastance (Ea)/ end-systolic elastance (Ees). While this is often done with echocardiography, obtaining Ea/Ees using impedance cardiography is feasible, although this possibility has not been explored so far.
OBJECTIVE
The aim of this study was to compare the Ea/Ees values obtained using echocardiography and impedance cardiography.
APPROACH
Two independent operators estimated Ea/Ees in 91 (41 ± 14 years old, women 51%) untreated apparently healthy individuals using (1) Doppler echocardiography with the single-beat method developed by Chen et al (2001 J. Am. Coll. Cardiol. 38 2028-34); and (2) data provided by impedance cardiography. The differences between Ea/Ees values were compared and correlation between both methods was estimated.
MAIN RESULTS
Although Ea and Ees values calculated by impedance cardiography were lower than those estimated by echocardiography (-0.201 ± 0.457 mmHg ml
SIGNIFICANCE
In healthy individuals, estimation of Ea/Ees by impedance cardiography yielded similar values to those obtained using echocardiography.
Identifiants
pubmed: 31652431
doi: 10.1088/1361-6579/ab5172
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM