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Sun Y, Ma J, Yan T, Tian D, Zhang C, Zhang F, Zhao Y, Fu S, Yan C. Evaluation of cardiac index and right ventricular hypertrophy index in rats under a chronic hypoxic environment at high altitude. Heliyon 2024; 10:e25229. [PMID: 38333787 PMCID: PMC10850543 DOI: 10.1016/j.heliyon.2024.e25229] [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: 09/07/2023] [Revised: 01/03/2024] [Accepted: 01/23/2024] [Indexed: 02/10/2024] Open
Abstract
High-altitude areas are characterized by low pressure and hypoxia, which have a significant impact on various body systems. This study aimed to investigate the alterations in cardiac index and right ventricular hypertrophy index(RVHI) in rats at different altitudes.Twenty-one male Sprague-Dawley (SD) rats aged 4 weeks were randomly divided into three groups based on altitude. The rats were raised for 28 weeks and then transferred to Qinghai University Plateau Medicine Laboratory. Body weight was measured, heart organs were isolated and weighed, and cardiac index and right ventricular hypertrophy index were determined. Statistical analysis was performed on the data from the three groups. Compared with the plain group, the body weight of the middle-altitude group was significantly decreased (P < 0.05), and cardiac index, RVHI-1, RVHI-2 increased significantly ((P < 0.05). The body weight, whole heart mass, right ventricular mass were significantly decreased in high-altitude group (P < 0.05), RVHI-1 and RVHI-2 were significantly increased (P < 0.05). Compared with the middle-altitude group, the body weight, whole heart mass and right ventricular mass of the high-altitude group were significantly decreased (P < 0.05), and RVHI-1 and RVHI-2 were significantly increased (P < 0.05). Increasing altitude led to a decrease in body weight, whole heart mass, and right ventricular mass in rats, indicating structural changes in the right heart. Additionally, the proportion of right heart to body weight and whole heart increased with altitude.
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Affiliation(s)
- Yanqiu Sun
- Department of Radiology, Qinghai Provincial People's Hospital, Xining, China
- Suzhou Medical College of Soochow University, Suzhou, China
| | - Jinfeng Ma
- Department of Hematology, Jining No.1 People's Hospital, Jining, China
| | | | - Dengfeng Tian
- Department of Radiology, Qinghai Provincial People's Hospital, Xining, China
| | - Chenhong Zhang
- Department of Radiology, Qinghai Provincial People's Hospital, Xining, China
| | - Fengjuan Zhang
- Department of Radiology, Qinghai Provincial People's Hospital, Xining, China
- Graduate School of Qinghai University, Xining, China
| | - Yuchun Zhao
- Department of Radiology, Qinghai Provincial People's Hospital, Xining, China
- Graduate School of Qinghai University, Xining, China
| | - Shihan Fu
- Department of Radiology, Qinghai Provincial People's Hospital, Xining, China
- Graduate School of Qinghai University, Xining, China
| | - Chunlong Yan
- Department of Radiology, Jining No.1 People's Hospital, Jining, China
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Yan C, Tian D, Zhang C, Zhang Q, Sun Y. Evaluation of blood cellular and biochemical parameters in rats under a chronic hypoxic environment at high altitude. Ann Med 2023; 55:898-907. [PMID: 36896573 PMCID: PMC10796155 DOI: 10.1080/07853890.2023.2184859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 02/21/2023] [Indexed: 03/11/2023] Open
Abstract
BACKGROUND The purpose of this study was to explore the changes in blood cellular and biochemical parameters of rats in a natural environment of low pressure and low oxygen on the plateau. METHODS Male Sprague-Dawley rats in two groups were raised in different environments from 4 weeks of age for a period of 24 weeks. They were raised to 28 weeks of age and then transported to the plateau medical laboratory of Qinghai University. Blood cellular and biochemical parameters were measured and the data of the two groups were statistically analyzed. RESULTS 1. RBC in the HA group was higher than that in the Control group, but there was no significant difference between the two groups (p > 0.05), Compared with the Control group, HGB, MCV, MCH, MCHC and RDW in the HA group were significantly higher (p < 0.05). 2. Compared with the Control group, WBC, LYMP, EO, LYMP% and EO% in the HA group decreased significantly (p < 0.05), and ANC% increased significantly (p < 0.05). 3. In the platelet index, compared with the Control group, PLT in the HA group was significantly reduced (p < 0.05), PDW, MRV, P-LCR were significantly increased (p < 0.05). 4. In blood biochemical indicators, compared with the Control group, AST, TBIL, IBIL, LDH in the HA group decreased significantly (p < 0.05), CK in the HA group increased significantly (p < 0.05). CONCLUSIONS 1. The indexes related to red blood cells, white blood cells, platelets and some biochemical indexes in the blood of rats at high altitude have changed. 2. Under the high altitude environment, the oxygen carrying capacity of SD rats is improved, the resistance to disease may be reduced, the coagulation and hemostasis functions may be affected, and there is a risk of bleeding. The liver function, renal function, heart function and skeletal muscle energy metabolism may be affected. 3. This study can provide an experimental basis for the research on the pathogenesis of high-altitude diseases from the perspective of blood.KEY MESSAGESIn this study, red blood cells, white blood cells, platelets and blood biochemical indicators were included in the real plateau environment to comprehensively analyze the changes of blood cellular and biochemical parameters in rats under the chronic plateau hypobaric hypoxia environment.From the perspective of blood, this study can provide an experimental basis for research on the pathogenesis of high-altitude diseases.Explore the data support of oxygen-carrying capacity, disease resistance and energy metabolism of the body in the natural environment at high altitude.
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Affiliation(s)
- Chunlong Yan
- Suzhou Medical College of Soochow University, suzhou, China
- Department of Radiology, Jining No.1 People’s Hospital, Jining, China
- Department of Radiology, Qinghai Provincial People’s Hospital, Xining, China
| | - Dengfeng Tian
- Department of Radiology, Qinghai Provincial People’s Hospital, Xining, China
| | - Chenhong Zhang
- Department of Radiology, Qinghai Provincial People’s Hospital, Xining, China
| | - Qiang Zhang
- Department of Neurosurgery, Qinghai Provincial People's Hospital, Xining, China
| | - Yanqiu Sun
- Department of Radiology, Qinghai Provincial People’s Hospital, Xining, China
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Derstine M, Jean D, Beidleman BA, Pichler Hefti J, Hillebrandt D, Horakova L, Kriemler S, Mateikaitė-Pipirienė K, Paal P, Rosier AJ, Andjelkovic M, Keyes LE. Acute Mountain Sickness and High Altitude Cerebral Edema in Women: A Scoping Review-UIAA Medical Commission Recommendations. High Alt Med Biol 2023; 24:259-267. [PMID: 37870579 DOI: 10.1089/ham.2023.0043] [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] [Indexed: 10/24/2023] Open
Abstract
Derstine, Mia, Dominique Jean, Beth A. Beidleman, Jacqueline Pichler Hefti, David Hillebrandt, Lenka Horakova, Susi Kriemler, Kasté Mateikaité-Pipiriené, Peter Paal, Alison Rosier, Marija Andjelkovic, and Linda E. Keyes. Acute mountain sickness and high altitude cerebral edema in women: A scoping review-UIAA Medical Commission recommendations. High Alt Med Biol. 24:259-267, 2023. Background: Acute mountain sickness (AMS) and high-altitude cerebral edema (HACE) are illnesses associated with rapid ascent to altitudes over 2,500 m in unacclimatized lowlanders. The aim of this scoping review is to summarize the current knowledge on sex differences in the epidemiology, pathophysiology, symptomatology, and treatment of AMS and HACE, especially in women. Methods and Results: The UIAA Medical Commission convened an international author team to review women's health issues at high altitude and to publish updated recommendations. Pertinent literature from PubMed and Cochrane was identified by keyword search combinations (including AMS, HACE, and high altitude), with additional publications found by hand search. The primary search focus was for articles assessing lowland women sojourning at high altitude. Results: The literature search yielded 7,165 articles, 37 of which were ultimately included. The majority of publications included did not find women at increased risk for AMS or HACE. There was extremely limited sex-specific data on risk factors or treatment. Conclusions: There is a limited amount of data on female-specific findings regarding AMS and HACE, with most publications addressing only prevalence or incidence with regard to sex. As such, general prevention and treatment strategies for AMS and HACE should be used regardless of sex.
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Affiliation(s)
- Mia Derstine
- Department of Emergency Medicine, University of Colorado, Aurora, Colorado, USA
| | - Dominique Jean
- Medical Commission of the International Climbing and Mountaineering Federation (UIAA), Bern, Switzerland
- Paediatrics, Infectious Diseases and Altitude Medicine, Grenoble, France
| | - Beth A Beidleman
- US Army Research Institute of Environmental Medicine, Military Performance Division, Natick, Massachusetts, USA
| | | | - David Hillebrandt
- Medical Commission of the International Climbing and Mountaineering Federation (UIAA), Bern, Switzerland
- General Medical Practitioner, Holsworthy, United Kingdom
| | - Lenka Horakova
- Medical Commission of the International Climbing and Mountaineering Federation (UIAA), Bern, Switzerland
- Department of Biomedical Technology, Faculty of Biomedical Engineering, Czech Technical University in Prague, Kladno, Czech Republic
| | - Susi Kriemler
- Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland
| | - Kastė Mateikaitė-Pipirienė
- Medical Commission of the International Climbing and Mountaineering Federation (UIAA), Bern, Switzerland
- Diaverum Clinics, Elektrėnai Division, Lithuania
| | - Peter Paal
- Medical Commission of the International Climbing and Mountaineering Federation (UIAA), Bern, Switzerland
- Department of Anaesthesiology and Intensive Care Medicine, St. John of God Hospital, Paracelesus Medical University, Salzburg, Austria
| | - Alison J Rosier
- Medical Commission of the International Climbing and Mountaineering Federation (UIAA), Bern, Switzerland
| | - Marija Andjelkovic
- Medical Commission of the International Climbing and Mountaineering Federation (UIAA), Bern, Switzerland
- Pharmacy, Singidunum University, Belgrade, Serbia
| | - Linda E Keyes
- Department of Emergency Medicine, University of Colorado, Aurora, Colorado, USA
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Tang X, Li X, Xin Q, Wang Q, Li S, Yang Y. Anxiety as a Risk Factor for Acute Mountain Sickness Among Young Chinese Men After Exposure at 3800 M: A cross‒sectional Study. Neuropsychiatr Dis Treat 2023; 19:2573-2583. [PMID: 38046832 PMCID: PMC10693273 DOI: 10.2147/ndt.s436438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 11/16/2023] [Indexed: 12/05/2023] Open
Abstract
Purpose We aimed to explore whether anxiety is a risk factor for acute mountain sickness [AMS] in a young Chinese male population. Patients and Methods A total of 143 young Chinese men with a median age of 23 years (IQR, 21-25) were employed in the present study, and they were divided into the AMS+ and AMS- groups according to the Lake Louise AMS score [AMS-S] after exposure at 3800 m for two days. Participants' pulse oximeter saturation [SpO2] and heart rate [HR] were measured. AMS was evaluated using the AMS-S. The anxiety and sleep quality of the subjects were assessed using the Zung Self-Rating Anxiety Scale [SAS] and the Athens Insomnia Scale [AIS], respectively. Outcomes were analysed using Spearman's partial correlation and logistic regression analysis. Results After two days of exposure at 3800 m, the overall prevalence of AMS was 54% in the whole group. The HR was significantly higher in the AMS+ group than in the AMS- group, as well as the SAS score and AIS score. A converse pattern was observed for SpO2. A significant difference was observed for the change in SAS and AIS score between the AMS+ and AMS- groups. Correlation analysis showed that AMS-S was positively correlated with SAS score, AIS score, HR, ΔSAS score, ΔAIS score, and ΔHR but negatively correlated with SpO2. AIS score was positively correlated with SAS score. After logistic regression analysis was adjusted for HR, SpO2, ΔAIS and ΔHR, SAS score (OR=1.446, 95% CI 1.200-1.744, p<0.001), AIS score (OR=1.216, 95% CI 1.033-1.432) and ΔSAS score (OR=1.158, 95% CI 1.012-1.327) were identified as independent risk factors for AMS. Conclusion The present study suggests that anxiety is a risk factor for AMS among young Chinese men, and poor sleep quality may partially mediate the association.
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Affiliation(s)
- Xugang Tang
- Department of Cardiology, The General Hospital of Western Theater Command, Chengdu, Sichuan, People’s Republic of China
- Department of Cardiology, The No. 37 Hospital of Chinese PLA, Ya’an, Sichuan, People’s Republic of China
| | - Xiuchuan Li
- Department of Cardiology, The General Hospital of Western Theater Command, Chengdu, Sichuan, People’s Republic of China
| | - Qian Xin
- Department of Cardiology, The Sixth Medical Center of Chinese PLA General Hospital, Beijing, People’s Republic of China
| | - Qiang Wang
- Department of Cardiology, The General Hospital of Western Theater Command, Chengdu, Sichuan, People’s Republic of China
| | - Shuang Li
- Department of Cardiology, The General Hospital of Western Theater Command, Chengdu, Sichuan, People’s Republic of China
| | - Yongjian Yang
- Department of Cardiology, The General Hospital of Western Theater Command, Chengdu, Sichuan, People’s Republic of China
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Yan C, Ma J, Tian D, Zhang C, Zhang F, Zhao Y, Fu S, Sun Y, Zhang Q. Evaluation of Myocardial Microcirculation in Rats under a High-Altitude Hypoxic Environment by Computed Tomography Myocardial Perfusion Imaging. Int Heart J 2023; 64:928-934. [PMID: 37778996 DOI: 10.1536/ihj.23-100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
This study aims to examine the changes in myocardial microcirculation in rats in a high-altitude hypoxic environment via computed tomography (CT) myocardial perfusion imaging technology. Rats in two groups were raised in different environments from 4 weeks of age for a period of 24 weeks. At 28 weeks of age, both groups underwent CT myocardial perfusion scanning, and the following myocardial perfusion parameters were measured: time to peak (TTP), mean transit time (MTT), blood flow (BF), and blood volume (BV). Following the scan, the rats were sacrificed, the cardiac index and right ventricular hypertrophy index were obtained, and hematoxylin-eosin (HE) staining was utilized to observe the pathological changes in the myocardium. In the group of rats that are subject to a high-altitude hypoxic environment for 24 weeks (the high-altitude group), the TTP and MTT values were increased (P < 0.05), the BF and BV values were lower (P < 0.05), the right heart mass was higher (P < 0.05) than that in the low-altitude group. As shown by the pathological results of HE staining, the gap between cardiomyocytes in the high-altitude group was widened, the arrangement of cardiomyocytes was irregular, and the cells were filled with a few fat vacuoles. The myocardial microcirculation is altered in a high-altitude hypoxic environment. In particular, the myocardium is in a state of inadequate perfusion, the BF in the myocardium slows down, and the right heart displays compensatory hypertrophy.
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Affiliation(s)
- Chunlong Yan
- Suzhou Medical College of Soochow University
- Department of Radiology, Qinghai Provincial People's Hospital
- Department of Radiology, Jining No.1 People's Hospital
| | - Jinfeng Ma
- Suzhou Medical College of Soochow University
- Department of Hematology, Jining No.1 People's Hospital
| | - Dengfeng Tian
- Department of Radiology, Qinghai Provincial People's Hospital
| | - Chenhong Zhang
- Department of Radiology, Qinghai Provincial People's Hospital
| | - Fengjuan Zhang
- Department of Radiology, Qinghai Provincial People's Hospital
- Graduate School of Qinghai University
| | - Yuchun Zhao
- Department of Radiology, Qinghai Provincial People's Hospital
- Graduate School of Qinghai University
| | - Shihan Fu
- Department of Radiology, Qinghai Provincial People's Hospital
- Graduate School of Qinghai University
| | - Yanqiu Sun
- Suzhou Medical College of Soochow University
- Department of Radiology, Qinghai Provincial People's Hospital
| | - Qiang Zhang
- Department of Neurosurgery, Qinghai Provincial People's Hospital
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