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Švorc P, Grešová S, Švorc P. Heart rate variability in male rats. Physiol Rep 2023; 11:e15827. [PMID: 37735345 PMCID: PMC10514026 DOI: 10.14814/phy2.15827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 09/09/2023] [Accepted: 09/12/2023] [Indexed: 09/23/2023] Open
Abstract
The cardiovascular system is primarily controlled by the autonomic nervous system, and any changes in sympathetic or parasympathetic activity also have an impact on myocardial activity. Heart rate variability (HRV) is a readily available metric used to assess heart rate control by the autonomic nervous system. HRV can provide information about neural (parasympathetic, sympathetic, reflex) and humoral (hormones, thermoregulation) control of myocardial activity. Because there are no relevant reference values for HRV parameters in rats in the scientific literature, all experimental results are only interpreted on the basis of changes from currently measured control or baseline HRV values, which are, however, significantly different in individual studies. Considering the significant variability of published HRV data, the present study focused primarily on comparing control or baseline HRV values under different conditions in in vivo experiments involving rats. The aim of the study was therefore to assess whether there are differences in the starting values before the experiment itself.
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Affiliation(s)
- Pavol Švorc
- Department of Physiology and Pathophysiology, Faculty of MedicineOstrava UniversityOstravaCzech Republic
| | - Soňa Grešová
- Department of Physiology, Faculty of MedicineUniversity PJ SafarikaKosiceSlovak Republic
| | - Pavol Švorc
- Department of Physiology and Pathophysiology, Faculty of MedicineOstrava UniversityOstravaCzech Republic
- Department of Physiology, Faculty of MedicineUniversity PJ SafarikaKosiceSlovak Republic
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Holanda TM, Rocha DG, Silveira JAM, Costa PPC, Maia PHF, Ingram C, Moraes MEADE, Fechine FV, Moraes Filho MODE. Effect of essential oil of Alpinia zerumbet on cardiovascular and autonomic function in rats with isoproterenol induced acute myocardial infarction. AN ACAD BRAS CIENC 2023; 95:e20201878. [PMID: 37585966 DOI: 10.1590/0001-3765202320201878] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Accepted: 03/17/2021] [Indexed: 08/18/2023] Open
Abstract
Alpinia zerumbet is a plant popularly used to treat hypertension and anxiety. Studies with Alpinia zerumbet demonstrate antihypertensive and vasodilator effects, among others. The objective of this study was to analyze the effect of essential oil of Alpinia zerumbet (EOAz) on cardiovascular and autonomic function in rats with isoproterenol-induced myocardial infarction. Male Wistar rats (n=32) were equally allocated into four groups: Control, ISO (150mg/kg, subcutaneous), EOAz (100mg/kg by gavage), ISO+EOAz. The rats were evaluated for cardiovascular and, autonomic parameters, electrocardiogram, and infarct size. EOAz was not able to reduce the electrocardiographic variations induced by ISO. Heart rate variability showed a decrease in sympathetic modulation on the heart in the groups treated with EOAz. The cardiopulmonary reflex induced by serotonin invoked a superior blood pressure variation at the 2 µg/kg dose in the EOAz treated groups, while the heart rate variation was significantly higher at the 16 µg/kg dose, when compared to other doses, in all groups, except EOAz+ISO. The sympathetic vagal index was higher in ISO group than in control. EOAz did not reduce the infarct size. We conclude that pretreatment with EOAz does not reverse the hemodynamic and electrocardiographic damage caused by isoproterenol but does reduce sympathetic modulation.
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Affiliation(s)
- Thais M Holanda
- North Carolina Central University, Biomedical/Biotechnology Research Institute, 700 George Street, Durham, NC 27707, USA
| | - Danilo G Rocha
- Universidade Federal do Ceará, Departamento de Fisiologia e Farmacologia, Núcleo de Pesquisa e Desenvolvimento de Medicamentos, Rua Coronel Nunes de Melo, 1000, 60430-275 Fortaleza, CE, Brazil
| | - João Alison M Silveira
- Universidade Federal do Ceará, Departamento de Fisiologia e Farmacologia, Núcleo de Pesquisa e Desenvolvimento de Medicamentos, Rua Coronel Nunes de Melo, 1000, 60430-275 Fortaleza, CE, Brazil
| | - Paula Priscila C Costa
- Universidade Federal de Pelotas, Departamento de Clínica Veterinária, Campus Universitário, s/n, 96160-000 Capão do Leão, RS, Brazil
| | - Pedro Henrique F Maia
- Universidade Federal do Ceará, Núcleo de Pesquisa e Desenvolvimento de Medicamentos, Rua Coronel Nunes de Melo, 1000, 60430-275 Fortaleza, CE, Brazil
| | - Catherine Ingram
- Universidade Federal do Ceará, Núcleo de Pesquisa e Desenvolvimento de Medicamentos, Rua Coronel Nunes de Melo, 1000, 60430-275 Fortaleza, CE, Brazil
| | - Maria Elisabete A DE Moraes
- Universidade Federal do Ceará, Departamento de Fisiologia e Farmacologia, Núcleo de Pesquisa e Desenvolvimento de Medicamentos, Rua Coronel Nunes de Melo, 1000, 60430-275 Fortaleza, CE, Brazil
| | - Francisco V Fechine
- Universidade Federal do Ceará, Núcleo de Pesquisa e Desenvolvimento de Medicamentos, Rua Coronel Nunes de Melo, 1000, 60430-275 Fortaleza, CE, Brazil
| | - Manoel O DE Moraes Filho
- Universidade Federal do Ceará, Departamento de Fisiologia e Farmacologia, Núcleo de Pesquisa e Desenvolvimento de Medicamentos, Rua Coronel Nunes de Melo, 1000, 60430-275 Fortaleza, CE, Brazil
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Khodadadi F, Ketabchi F, Khodabandeh Z, Tavassoli A, Lewis GF, Bahaoddini A. The effect of subdiaphragmatic vagotomy on heart rate variability and lung inflammation in rats with severe hemorrhagic shock. BMC Cardiovasc Disord 2022; 22:181. [PMID: 35439928 PMCID: PMC9020113 DOI: 10.1186/s12872-022-02594-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 03/28/2022] [Indexed: 11/10/2022] Open
Abstract
Background The influence of cutting the sub-diaphragmatic branch of the vagus nerve on heart rate variability (HRV) and inflammatory reaction to severe hemorrhagic shock has not been determined prior to this study. Methods Male Sprague–Dawley rats were divided into four groups of Sham, sub-diaphragmatic vagotomized (Vag), subacute (135 ± 2 min) hemorrhagic shock (SHS), and sub-diaphragmatic vagotomized with SHS (Vag + SHS). Hemodynamic parameters were recorded and HRV calculated during multiple phases in a conscious model of hemorrhagic shock. The expressions of TNF-α and iNOS were measured in the spleen and lung tissues at the conclusion of the protocol. Results Decreases in blood pressure during blood withdrawal were identical in the SHS and Vag + SHS groups. However, heart rate only decreased in the Nadir-1 phase of the SHS group. HRV indicated increased power in the very-low, low, and high (VLF, LF, and HF) frequency bands during the Nadir-1 phase of the SHS and Vag + SHS groups, albeit the values were higher in the SHS group. In the recovery phase, the HF bands were only lower in the SHS group. After hemorrhagic shock followed by resuscitation, the expression of TNF-α and iNOS increased in the spleen and lung of the SHS group, and the expression of these genes was significantly lower in the Vag + SHS group than in the SHS group. Conclusion Parasympathetic activity increases during the hypotensive phase of hemorrhagic shock, whereas the cardiac vagal tone decreases in the recovery phase. Sub-diapragmatic vagotomy blunts the cardiac vagal tone during hemorrhagic shock, but its effect is reversed in the recovery phase. The vagus nerve plays a role in proinflammatory responses in the lungs and spleen in subacute hemorrhagic shock followed by resuscitation.
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Affiliation(s)
- Fateme Khodadadi
- Department of Biology, College of Sciences, Shiraz University, Shiraz, Iran
| | - Farzaneh Ketabchi
- Department of Physiology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Zahra Khodabandeh
- Stem Cell Technology Research Center, Shiraz University of Medical Science, Shiraz, Iran
| | - Alireza Tavassoli
- Department of Pathology, Fasa University of Medical Sciences, Fasa, Iran
| | - Gregory F Lewis
- Intelligent Systems Engineering, Indiana University, Bloomington, IN, USA.,The Traumatic Stress Research Consortium at the Kinsey Institute, Indiana University, Bloomington, IN, USA
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Wen X, Song DX, Li KX, Wang LN, Xiong X, Li HD, Cui CP, Lu XL, Li BY, Liu Y. Ah-type baroreceptor neurons expressing estrogen dependent mGluR7 mediate descending inhibition of cardiac nociception. Neuroscience 2022; 492:18-31. [DOI: 10.1016/j.neuroscience.2022.04.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 04/03/2022] [Accepted: 04/08/2022] [Indexed: 11/28/2022]
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Wen X, Yu X, Huo R, Yan QX, Wu D, Feng Y, Li Y, Sun X, Li XY, Sun J, Li KX, Li QY, Han LM, Lu XL, Liu Y, Shou W, Li BY. Serotonin-Mediated Cardiac Analgesia via Ah-Type Baroreceptor Activation Contributes to Silent Angina and Asymptomatic Infarction. Neuroscience 2019; 411:150-163. [DOI: 10.1016/j.neuroscience.2019.05.045] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 05/20/2019] [Accepted: 05/22/2019] [Indexed: 12/14/2022]
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