Evaluation of the Heart Rate Variability with Laser Speckle Imaging
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2020
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BRAZILIAN CONGRESS IN BIOMEDICAL ENGINEERING, 27th
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Resumo
The Autonomic Nervous System (ANS) is
responsible for regulating various physiological processes in the
human body. The Heart Rate Variability (HRV) represents a
measurement used in evaluating the modulation of the ANS in
different physiological conditions such as stress, physical
activity, sleep, metabolic alterations, and, also, pathological
conditions. Physical activity results in important changes in the
cardiovascular system, such as an increase in blood flow and a
decrease of the peripheral vascular resistance. Monitoring the
peripheral microcirculation represents an important aid in
evaluating the general conditions of an individual. The Laser
Speckle Contrast Analysis (LASCA) is a non-invasive optical
resource developed that uses nonionizing radiation in the region
of the infrared and is important in the diagnosis of problems
regarding the peripheral microcirculation. This work aimed to
implement a method to obtain the HRV through the peripheral
microcirculation utilizing the Laser Speckle Contrast Analysis
(LASCA) technique. A commercial LASCA equipment was
used to obtain a face-video. A custom software was implemented
to process the LASCA videos and obtain the HRV. A heart rate
monitor (HRM) was also utilized to measure the HRV and the
values were compared against the ones obtained with LASCA.
The method had consistent results in obtaining both the
pulsation and the HRV, making it possible for future studies to
use such a technique.
Como referenciar
CARVALHO, C.M.S.; MARINELI, A.G.F.; SANTOS, L. dos; FREITAS, A.Z. de; AMARAL, M.M. Evaluation of the Heart Rate Variability with Laser Speckle Imaging. In: BRAZILIAN CONGRESS IN BIOMEDICAL ENGINEERING, 27th, October 26-30, 2020, Vitória, ES. Proceedings... Rio de Janeiro, RJ: Sociedade Brasileira de Engenharia Biomédica, 2020. p. 430-433. Disponível em: http://200.136.52.105/handle/123456789/31680. Acesso em: 20 Mar 2026.
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