Heart Rate Variability Monitoring during Interferential Current Application in the Lower Back Area: A Cross-Sectional Study

Blanca De-la-Cruz-Torres, Eva Martínez-Jiménez, Emmanuel Navarro-Flores, Patricia Palomo-López, Vanesa Abuín-Porras, Raquel Díaz-Meco-Conde, Daniel López-López and Carlos Romero-Morales
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Blanca De-la-Cruz-Torres: Department of Physiotherapy, University of Seville, Avicena Street, 41009 Seville, Spain
Eva Martínez-Jiménez: Facultad de Fisioterapia y Enfermería, Departamento de Enfermería, Universidad de Castilla la Mancha, 45071 Toledo, Spain
Emmanuel Navarro-Flores: Frailty Research Organized Group (FROG), Department of Nursing, Faculty of Nursing and Podiatry, University of Valencia, 46001 Valencia, Spain
Patricia Palomo-López: University Center of Plasencia, Faculty of Podiatry, Universidad de Extremadura, 10600 Badajoz, Spain
Vanesa Abuín-Porras: Faculty of Sport Sciences, Universidad Europea de Madrid, Villaviciosa de Odón, 28670 Madrid, Spain
Raquel Díaz-Meco-Conde: Faculty of Sport Sciences, Universidad Europea de Madrid, Villaviciosa de Odón, 28670 Madrid, Spain
Daniel López-López: Research, Health and Podiatry Group, Department of Health Sciences, Research, Faculty of Nursing and Podiatry, Universidade da Coruña, 15403 Ferrol, Spain
Carlos Romero-Morales: Faculty of Sport Sciences, Universidad Europea de Madrid, Villaviciosa de Odón, 28670 Madrid, Spain

IJERPH, 2021, vol. 18, issue 7, 1-10

Abstract: Vasovagal reactions may occur occasionally during electrical stimulation using interferential current (IFC). The purpose of this study was to examine variations in autonomic activity during the application of IFC in asymptomatic participants by analysis of their heart rate variability (HRV). Seventy-three male volunteers were randomly assigned to a placebo group ( n = 36; HRV was documented for 10 min, both at rest and during a placebo intervention) and an intervention group ( n = 37; HRV was documented for 10 min in two conditions labelled as (1) rest and (2) application of IFC technique on the lumbar segment). The diameters of the Poincaré plot (SD1, SD2), stress score (SS), and the ratio between sympathetic and parasympathetic activity (S/PS) were measured. After interventions, differences amongst the placebo group and the IFC group were found in SD2 ( p < 0.001), SS ( p = 0.01) and S/PS ratio ( p = 0.003). The IFC technique was associated with increased parasympathetic modulation, which could induce a vasovagal reaction. Monitorization of adverse reactions should be implemented during the application of IFC technique. HRV indicators might have a part in prevention of vasovagal reactions. Further studies in patients with lumbar pain are needed to explore possible differences in HRV responses due to the presence of chronic pain.

Keywords: interferential current; heart-rate variability; autonomic balance; sensor technology (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2021
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