Heart rate and ventricular repolarization variabilities interactions modification by microgravity simulation during head-down bed rest test

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2013

Autores

Bolea, J (Autor) Outra; Laguna, P (Autor) Outra; Caiani, EG (Autor) Outra; Almeida, R (Autor) FCUP

Ata de Conferência Internacional

Título: 2013 IEEE 26TH INTERNATIONAL SYMPOSIUM ON COMPUTER-BASED MEDICAL SYSTEMS (CBMS)

Páginas: 552-553

26th IEEE International Symposium on Computer-Based Medical Systems (CBMS)

Porto, PORTUGAL, JUN 20-22, 2013

Indexação

ISI Web of Knowledge - 3 Citações

Scopus - 0 Citações

Outras Informações

ID Authenticus: P-008-HZG

DOI: 10.1109/CBMS.2013.6627873

Abstract (EN): Features extracted from heart rate variability (HRV) have allowed to classify several cardiac disorders. In this work, the linear relationship between HRV and ventricular repolarization variability is studied as a possible feature for stratifying risk of cardiac arrhythmias under weightlessness conditions. Three VR beat-to-beat indexes extracted from ECG signals as QT, QT(p) (QRS onset to T wave peak) and T-pe (peak to end of T wave) were measured. ARARX modeling was used to estimate the VR variability fraction driven by HRV. Head down bed rest as microgravity Earth-based test increased the linear dependency of VR variability driven by HRV. Furthermore, in a pairwise comparison between PRE and POST conditions showed significant differences (p-values < 0.05) for T-pe variability contents. These results evidence a reduced recovery capacity for the T-pe repolarization variability to restore its linear dependency values to HR in the first moments at the end of BR.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 2