Mechanical deconditioning of the heart due to long-term bed rest as observed on seismocardiogram morphology.

ABSTRACT: During head-down tilt bed rest (HDT) the cardiovascular system is subject to headward fluid shifts. The fluid shift phenomenon is analogous to weightlessness experienced during spaceflight microgravity. The purpose of this study was to investigate the effect of prolonged 60-day bed rest on the mechanical performance of the heart using the morphology of seismocardiography (SCG). Three-lead electrocardiogram (ECG), SCG and blood pressure recordings were collected simultaneously from 20 males in a 60-day HDT study (MEDES, Toulouse, France). The study was divided into two campaigns of ten participants. The first commenced in January, and the second in September. Signals were recorded in the supine position during the baseline data collection (BDC) before bed rest, during 6° HDT bed rest and du

SUBMITTER: Hoffmann B 

PROVIDER: S-EPMC9276739 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature