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Temporal inequality of RR intervals like a new psychophysiological indicator of mental stress

By
Miguel Enrique Sanchez-Hechavarria ,
Miguel Enrique Sanchez-Hechavarria

Laboratorio de Psicología, Departamento de Psicología, Universidad de Concepción. Concepción: Chile

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Ramon Carrazana-Escalona ,
Ramon Carrazana-Escalona

Departamento de Ciencias Básicas, Facultad de Medicina, Universidad Católica de la Santísima Concepción. Concepción, Chile

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Sergio Cortina-Reyna ,
Sergio Cortina-Reyna

Departamento de Ciencias Básicas Biomédicas. Facultad de Medicina 1. Universidad de Ciencias Médicas de Santiago de Cuba. Santiago de Cuba, Cuba

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Victor Ernesto González-Velázquez ,
Victor Ernesto González-Velázquez

Departamento de Ciencias Básicas Biomédicas. Facultad de Medicina. Universidad de Ciencias Médicas de Villa Clara. Villa Clara, Cuba

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Elys María Pedraza-Rodríguez ,
Elys María Pedraza-Rodríguez

Departamento de Ciencias Básicas Biomédicas. Facultad de Medicina. Universidad de Ciencias Médicas de Villa Clara. Villa Clara, Cuba

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Adán Andreu-Heredia ,
Adán Andreu-Heredia

Departamento de Ciencias Básicas, Facultad de Medicina, Universidad Católica de la Santísima Concepción. Concepción, Chile

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Erislandis López-Galán ,
Erislandis López-Galán

Departamento de Ciencias Básicas Biomédicas. Facultad de Medicina 2. Universidad de Ciencias Médicas de Santiago de Cuba. Santiago de Cuba, Cuba

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Abstract

Introduction: Gini coefficient (Gini index or Gini ratio) is a parameter that is normally used in economy to measure the income distribution in a country or in the whole wide world, but it can be used to measure any kind of distribution. In the present study it is exposed an innovative proposal of application of the Gini coefficient to Heart Rate Variability (HRV) like a psychophysiological indicator of mental stress.
Objective: To assess the application of the Gini coefficient as a psychophysiological indicator of mental stress.
Methods: A non-observational crossover study, carried out in the biomedical laboratory of the Medical University of Santiago de Cuba. The involved participants are 13 healthy individuals (age 19 ± 1.5 years). Heart rate was continuously recorded at rest (5 minutes) and during a mental stress (5 minutes). Linear and nonlinear methods of heart rate variability were assessed, and 2 new indicators (Sequential and Non-Sequential Gini) were calculated and proposed to measure HRV differences between states.
Results: When comparing rest and mental stress conditions, a sensible decrease of the traditional indicators of the HRV was founded (p<0,05), an increase of the heart rate (p=0,004) and of the Sequential Gini (p=0,004) and Non-Sequential Gini (p=0,04).
Conclusions: The results suggest that temporary inequality of the RR intervals analyzed from the Gini coefficient could be an adequate indicator of sympathetic activity present during the mental stress.

How to Cite

1.
Sanchez Hechavarria ME, Carrazana-Escalona R, Cortina-Reyna S, González Velázquez VE, Pedraza Rodríguez EM, Andreu Heredia A, López Galán E. Temporal inequality of RR intervals like a new psychophysiological indicator of mental stress. Salud, Ciencia y Tecnología [Internet]. 2024 Feb. 14 [cited 2024 Jul. 20];4:654. Available from: https://revista.saludcyt.ar/ojs/index.php/sct/article/view/654

The article is distributed under the Creative Commons Attribution 4.0 License. Unless otherwise stated, associated published material is distributed under the same licence.

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