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Heart rate variability in people with visual disability: Study Protocol.

Renaldo D Moreno^1,2,3,4, Luiz C Abreu^1,2,3,4,5, Mauro J D Morais^1,2,3,4

¹Universidade Federal do Acre, UFAC, Rio Brancro.

|November 15, 2019

Summary

This summary is machine-generated.

This study monitored autonomic nervous system (ANS) activity in individuals with visual impairment (VI) and those with simulated blindness. Findings reveal ANS alterations, highlighting the impact of vision loss on the body’s stress response.

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Area of Science:

Physiology
Ophthalmology
Neuroscience

Background:

Visual impairment (VI) significantly impacts daily activities and is associated with systemic autonomic nervous system (ANS) changes.
The ANS regulates the body's adaptation to environmental changes; its function in VI requires further investigation.
Heart rate (HR) variability is a key indicator of ANS activity.

Purpose of the Study:

To investigate the effects of acute simulated blindness and chronic visual deficiency on ANS activity.
To analyze stress responses by monitoring heart rate (HR) and blood pressure in individuals with and without visual impairment.

Main Methods:

A randomized trial comparing a control group with normal vision to a group with visual impairment (VI).
Acute simulation of blindness involved occluding participants' eyes for 45 minutes while they performed daily tasks.
Autonomic nervous system (ANS) activity was assessed by monitoring heart rate (HR) using a Polar RS800 HR monitor.

Main Results:

Participants with simulated blindness and those with chronic VI exhibited altered autonomic nervous system (ANS) activity.
Specific changes in heart rate (HR) variability indicated a stress response to visual deprivation.
Statistical significance was set at P < .05, with odds ratios calculated for risk assessment.

Conclusions:

Visual impairment, both acute and chronic, demonstrably affects autonomic nervous system (ANS) function.
The study underscores the physiological stress associated with vision loss.
Further research into ANS regulation in VI is warranted to inform supportive interventions.