Determination of Maximal Oxygen Uptake Using Seismocardiography at Rest

Determination of Maximal Oxygen Uptake Using Seismocardiography at Rest

Introduction: Assessment of maximal oxygen consumption (VO 2 max) is an important clinical tool when examining both healthy and unhealthy populations, as a low VO 2 max is associated with cardiovascular disease and all-cause mortality. Aim: This study investigated the accuracy of a non-exercise test...

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Bibliographic Details
Published in:2021 Computing in Cardiology (CinC) Vol. 48; pp. 1 - 4
Main Authors: Hansen, Mikkel T, Gronfeldt, Birk M, Romer, Tue, Fogelstrom, Mathilde, Sorensen, Kasper, Schmidt, Samuel E, Helge, Jorn W
Format: Conference Proceeding
Language:English
Published: Creative Commons 13-09-2021
Subjects:
Calorimetry
Correlation
Estimation
Integrated circuits
Predictive models
Seismic measurements
Sociology
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Summary:Introduction: Assessment of maximal oxygen consumption (VO 2 max) is an important clinical tool when examining both healthy and unhealthy populations, as a low VO 2 max is associated with cardiovascular disease and all-cause mortality. Aim: This study investigated the accuracy of a non-exercise test for assessment of VO 2 max using seismocardiography (SCG). Methods: 97 participants (20-45 years, 50 males) underwent a nonexercise test using SCG at rest in the supine position (SCG VO 2 max) and a graded exercise test to voluntary exhaustion on a cycle ergometer with indirect calorimetry (IC VO 2 max). An interim analysis was applied after 50 participants had completed testing (SCG VO 2 max 1.0) allowing for the algorithm to be modified (SCG VO 2 max 2.1). Results: SCG VO 2 max 2.1 ( n=47 , test set) estimation was 3.5 \pm 1.8\ ml\cdot min^{-1}\cdot kg^{-1}\ (p < 0.001) lower compared to IC VO 2 max, with a Pearson correlation of r=0.65 (p < 0.0001) and a standard error of estimate of 7.1 ml·min −1 ·kg −1 . The coefficient of variation between tests was 8\ \pm 1\% . Conclusion: The accuracy of VO 2 max assessment using SCG requires further optimization prior to clinical application, as SCG VO 2 max was systematically lower than IC VO 2 max, and only a moderate correlation together with considerable variation were observed between tests.
ISSN:2325-887X
DOI:10.23919/CinC53138.2021.9662756