scholarly journals Blood Pressure Load: An Effective Indicator of Systemic Circulation Status in Individuals With Acute Altitude Sickness

2022 ◽  
Vol 8 ◽  
Author(s):  
Renzheng Chen ◽  
Xiaowei Ye ◽  
Mengjia Sun ◽  
Jie Yang ◽  
Jihang Zhang ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Healthy Subjects ◽  
Acute Mountain Sickness ◽  
Clinical Information ◽  
Systemic Circulation ◽  
Load Variations ◽  
Altitude Exposure ◽  
Independent Risk Factors ◽  
Blood Pressure Device ◽  
The Relationship

Background: Acute high altitude (HA) exposure results in blood pressure (BP) variations in most subjects. Previous studies have demonstrated that higher BP is potentially correlated with acute mountain sickness (AMS). The BP load may be of clinical significance regarding systemic circulation status.Objectives: This study aimed to examine HA-induced BP changes in patients with AMS compared to those in healthy subjects. Further, we provided clinical information about the relationship between variations in 24-h ambulatory parameters (BP level, BP variability, and BP load) and AMS.Methods: Sixty-nine subjects were enrolled and all participants ascended Litang (4,100 m above sea level). They were monitored using a 24-h ambulatory blood pressure device and underwent echocardiography within 24 h of altitude exposure. The 2018 Lake Louise questionnaire was used to evaluate AMS.Results: The AMS group comprised more women than men [15 (65.2%) vs. 13 (28.3%), P < 0.001] and fewer smokers [4 (17.4%) vs. 23 (50.0%), P = 0.009]. The AMS group exhibited significant increases in 24-h BP compared to the non-AMS group (24-h SBP variation: 10.52 ± 6.48 vs. 6.03 ± 9.27 mmHg, P = 0.041; 24-h DBP variation: 8.70 ± 4.57 vs. 5.03 ± 4.98 mmHg, P = 0.004). The variation of mean 24-h cBPL (cumulative BP load) (mean 24-h cSBPL: 10.58 ± 10.99 vs. 4.02 ± 10.58, P = 0.016; 24-h mean cDBPL: 6.03 ± 5.87 vs. 2.89 ± 4.99, P = 0.034) was also obviously higher in AMS subjects than in non-AMS subjects after HA exposure. 24-h mean cSBPL variation (OR = 1.07, P = 0.024) and 24-h mean cDBPL variation (OR = 1.14, P = 0.034) were independent risk factors of AMS. Moreover, variation of 24-h mean cSBPL showed a good correlation with AMS score (R = 0.504, P < 0.001).Conclusions: Our study demonstrated that patients with AMS had higher BP and BP load changes after altitude exposure than healthy subjects. Excessive BP load variations were associated with AMS. Thus, BP load could be an effective indicator regarding systemic circulation status of AMS.

scholarly journals Cardiovascular Indicators of Systemic Circulation and Acute Mountain Sickness: An Observational Cohort Study

2021 ◽  
Vol 12 ◽  
Author(s):  
Renzheng Chen ◽  
Mengjia Sun ◽  
Jie Yang ◽  
Chuan Liu ◽  
Jihang Zhang ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Cohort Study ◽  
Acute Mountain Sickness ◽  
Cardiovascular Function ◽  
Systemic Circulation ◽  
Arterial Elastance ◽  
Headache Severity ◽  
Observational Cohort ◽  
Independent Risk Factors ◽  
Mountain Sickness

Background: Acute high-altitude (HA) exposure results in blood pressure (BP) and cardiac function variations in most subjects, some of whom suffer from acute mountain sickness (AMS). Several previous studies have found that cardiovascular function indicators are potentially correlated with AMS.Objectives: This study aims to examine HA-induced cardiovascular adaptations in AMS patients and compare them with healthy subjects. It also aims to investigate the relationship between cardiovascular function indicators and AMS, as well as to provide some insightful information about the prevention and treatment of AMS.Methods: Seventy-two subjects were enrolled in this cohort study. All the subjects ascended Litang (4,100 m above sea level). They were monitored by a 24-h ambulatory blood pressure (ABP) device and underwent echocardiography examination within 24 h of altitude exposure. The 2018 Lake Louise questionnaire was used to evaluate AMS.Results: Acute mountain sickness group consisted of more women (17 [60.7%] vs. 10 [22.7%], p = 0.001) and fewer smokers (5 [17.9%] vs. 23 [52.3%], p = 0.003). Compared with subjects without AMS, subjects with AMS had lower pulse pressure (PP) (daytime PP, 45.23 ± 7.88 vs. 52.14 ± 4.75, p < 0.001; nighttime PP, 42.81 ± 5.92 vs. 49.39 ± 7.67, p < 0.001) and lower effective arterial elastance (Ea) (1.53 ± 0.24 vs. 1.73 ± 0.39, p = 0.023). Multivariate regression indicated that female sex (OR = 0.23, p = 0.024), lower daytime PP (OR = 0.86, p = 0.004), and lower Ea (OR = 0.03, p = 0.015) at low altitude (LA) were independent risk factors for AMS. Combined daytime PP and Ea at LA had a high predictive value for AMS (AUC = 0.873; 95% CI: 0.789–0.956). Correlation analysis showed that AMS-induced headache correlated with daytime PP (R = −0.401, p < 0.001) and nighttime PP at LA (R = −0.401, p < 0.001).Conclusion: Our study demonstrated that AMS patients had a lower PP and Ea at LA. These baseline indicators of vasodilation at LA were closely associated with AMS, which may explain the higher headache severity in subjects with higher PP at LA.

scholarly journals Relationship between neutrophil/lymphocyte ratio and epicardial fat tissue thickness in patients with newly diagnosed hypertension

2018 ◽  
Vol 46 (3) ◽  
pp. 940-950 ◽  
Author(s):  
Mehmet Ali Derya ◽  
Vahit Demir ◽  
Huseyin Ede
Keyword(s):  
Blood Pressure ◽  
Healthy Subjects ◽  
Control Group ◽  
Newly Diagnosed ◽  
Fat Tissue ◽  
Tissue Thickness ◽  
Neutrophil Lymphocyte Ratio ◽  
Lymphocyte Ratio ◽  
Epicardial Fat Tissue ◽  
The Relationship

Objective Epicardial fat tissue thickness (EFT) and the neutrophil/lymphocyte ratio (NLR) are associated with atherosclerosis. Few studies have focused on the relationship between these parameters in patients with newly diagnosed hypertension. In this study, we examined the relationship between EFT and the NLR in patients with newly diagnosed hypertension detected by 24-hour ambulatory blood pressure monitoring (ABPM). Methods Eighty consecutive patients without chronic illness who were diagnosed with hypertension according to ABPM results and 80 otherwise healthy subjects were enrolled in the study. EFT of each participant was measured echocardiographically. The C-reactive protein (CRP) concentration and NLR were measured from venous blood samples. Results The 24-hour average systolic blood pressure was significantly higher in the hypertension group than in the control group (143±17 vs. 117±7 mmHg, respectively). There were no significant differences in age, sex, or body mass index between the two groups. EFT, the NLR, and the CRP concentration were significantly higher in the hypertension group than control group. Additionally, a significantly positive correlation between EFT and the NLR was found in both the control group and hypertension group. Conclusion A higher EFT and NLR were detected in patients with newly diagnosed hypertension than in healthy subjects.

Lower diastolic blood pressure in healthy subjects with vitamin K deficiency: a preliminary cross-sectional study

10.20883/181 ◽  
2016 ◽  
Vol 85 (4) ◽  
pp. 276
Author(s):  
Jan Krzysztof Nowak ◽  
Andrzej Wykrętowicz ◽  
Patrycja Krzyżanowska ◽  
Agnieszka Górna ◽  
Jarosław Tobolski ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Diastolic Blood Pressure ◽  
Vitamin K ◽  
Healthy Subjects ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Vitamin K Deficiency ◽  
Cross Sectional ◽  
K Deficiency ◽  
The Relationship

Introduction. There is a growing body of evidence for the role of vitamin K in cardiovascular health. As a cofactor of carboxylation of the matrix Gla protein it prevents arterial calcification. However, the data on the relationship between vitamin K status and the blood pressure are scarce, and particularly so in persons without the burden of cardiovascular risk factors. Material and Methods. We performed a pilot cross‑sectional study, in which we hypothesized that vitamin K deficiency is associated with a higher blood pressure in young, healthy people. The concentration of protein induced by vitamin K absence‑II (PIVKA‑II) larger than 2 ng/mL was chosen as a proxy for vitamin K deficiency; it was assessed in serum using ELISA. Blood pressure was measured using a validated, automated oscillometric monitor in triplicate.Results. Twenty‑three healthy subjects were enrolled (16 female; mean age 21.3 ± 1.6 years; body mass index 20.6 ± 2.4 kg/m2). The diastolic blood pressure (DBP) was lower in vitamin K‑deficient subjects (58 ± 9 vs. 67 ± 5 mmHg, p = 0.01). The mean arterial blood pressure also differed (75 ± 9 vs. 83 ± 6, p = 0.02). PIVKA‑II levels correlated with DBP only (Pearson’s R = -0.41, p < 0.05; Spearman’s ρ ns.). Stepwise regression identified PIVKA‑II concentrations as the only independent parameter associated with DBP (adjusted R2 = 13.1%; PIVKA‑II: β = -0.41; 95%CI -1.87-(-0.00098), t = -2.08, p < 0.05).Conclusions. The relationship between vitamin K deficiency and low DBP in young adults should be investigated further.

scholarly journals Lower diastolic blood pressure in healthy subjects with vitamin K deficiency: a preliminary cross-sectional study

2016 ◽  
Vol 85 (4) ◽  
pp. 276-280
Author(s):  
Jan Krzysztof Nowak ◽  
Andrzej Wykrętowicz ◽  
Patrycja Krzyżanowska ◽  
Agnieszka Górna ◽  
Jarosław Tobolski ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Diastolic Blood Pressure ◽  
Vitamin K ◽  
Healthy Subjects ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Vitamin K Deficiency ◽  
Cross Sectional ◽  
K Deficiency ◽  
The Relationship

Introduction. There is a growing body of evidence for the role of vitamin K in cardiovascular health. As a cofactor of carboxylation of the matrix Gla protein it prevents arterial calcification. However, the data on the relationship between vitamin K status and the blood pressure are scarce, and particularly so in persons without the burden of cardiovascular risk factors. Material and Methods. We performed a pilot cross-sectional study, in which we hypothesized that vitamin K deficiency is associated with a higher blood pressure in young, healthy people. The concentration of protein induced by vitamin K absence-II (PIVKA-II) larger than 2 ng/mL was chosen as a proxy for vitamin K deficiency; it was assessed in serum using ELISA. Blood pressure was measured using a validated, automated oscillometric monitor in triplicate.Results. Twenty-three healthy subjects were enrolled (16 female; mean age 21.3 ± 1.6 years; body mass index 20.6 ± 2.4 kg/m2). The diastolic blood pressure (DBP) was lower in vitamin K-deficient subjects (58 ± 9 vs. 67 ± 5 mmHg, p = 0.01). The mean arterial blood pressure also differed (75 ± 9 vs. 83 ± 6, p = 0.02). PIVKA-II levels correlated with DBP only (Pearson’s R = -0.41, p < 0.05; Spearman’s ? ns.). Stepwise regression identified PIVKA-II concentrations as the only independent parameter associated with DBP (adjusted R2 = 13.1%; PIVKA-II: ß = -0.41; 95%CI -1.87-(-0.00098), t = -2.08, p < 0.05).Conclusions. The relationship between vitamin K deficiency and low DBP in young adults should be investigated further.

scholarly journals Prevalence of Albuminuria in Cardiology and Endocrinology Departments and Its Influencing Factors: A Multicenter, Real-World Evidence Study in China

2020 ◽  
Vol 2020 ◽  
pp. 1-7 ◽  
Author(s):  
Qian Ren ◽  
Changsheng Ma ◽  
Jiguang Wang ◽  
Xiaohui Guo ◽  
Linong Ji
Keyword(s):  
Risk Factors ◽  
Blood Pressure ◽  
Reference Level ◽  
Immunochemical Method ◽  
Cross Sectional ◽  
Real World Evidence ◽  
Independent Risk Factors ◽  
Relationship Of ◽  
The Relationship ◽  
Concomitant Hypertension

Aims. To evaluate the prevalence of albuminuria and compare its risk factors in diabetic and hypertensive patients. Methods. This was an observational, cross-sectional, multicenter registry across China. Consecutive patients were registered with the Cardiology and Endocrine departments in 40 centers. Clinical characteristics were collected, and urinary albumin-to-creatinine ratio (UACR) was measured using the immunochemical method. Results. Of the 2510 patients enrolled in the study, 1515 underwent UACR testing and were included in the present analysis. The prevalence of microalbuminuria was 13.0% and 16.1% while that of macroalbuminuria was 2.5% and 5.0%, in the Cardiology and Endocrinology departments, respectively. HbA1c and systolic blood pressure (SBP) were independent risk factors for albuminuria. The relationship of blood pressure (BP) and HbA1c with albuminuria was continuous and graded. Compared with the reference level of SBP 130–139 mm Hg, an SBP level of <130 mmHg was significantly associated with a lower risk of albuminuria in all subjects (OR = 0.60; 95% CI: 0.40–0.89; P<0.001) and in subjects with concomitant hypertension and diabetes (OR = 0.48; 95% CI: 0.25–0.92; P<0.001). Conclusions. In China, nearly one-fifth of patients in the Cardiology and Endocrinology departments have albuminuria although ACEI/ARB were widely used. More effective therapy is needed in this population.

Decreased contrast sensitivity at high altitude

2019 ◽  
Author(s):  
Katrin Gekeler ◽  
Andreas Schatz ◽  
Manuel Dominik Fischer ◽  
Kai Schommer ◽  
Katrin Boden ◽  
...  
Keyword(s):  
Visual Acuity ◽  
High Altitude ◽  
Contrast Sensitivity ◽  
Visual Processing ◽  
Repeated Measures ◽  
Healthy Subjects ◽  
Acute Mountain Sickness ◽  
Clinical Importance ◽  
Peripheral Oxygen Saturation ◽  
Altitude Exposure

Background/aimsThe aim of this study was to investigate a change in visual acuity and contrast sensitivity (CS) during high altitude exposure in healthy subjects due to the effects of hypobaric hypoxia. This study is related to the Tübingen High Altitude Ophthalmology study.MethodsVisual acuity and Weber CS were tested monocularly using the Freiburger Visual Acuity and Contrast Test under standardised conditions in 14 healthy subjects at high altitude at the Capanna Margherita (4559 m, Italy) and compared with baseline measurements in Tübingen (341 m, Germany). Intraindividual differences between baseline and follow-up examinations were calculated by multivariate analysis of variance for repeated measures. Clinical parameters of peripheral oxygen saturation (SpO2) and heart rate (HR) as well as scores for acute mountain sickness (AMS) were correlated to psychophysical tests by Pearson’s correlation coefficient.ResultsA significant decrease in CS with a mean effect size of −0.13 logCS was found for Weber CS (day 1=−0.16±0.22, p=0.01; day 2=−0.10±0.2, p=0.049; day 3=−0.12±0.19, p=0.03) at high altitude compared with baseline. Visual acuity remained unchanged. Decreased CS correlated with SpO2 (r=0.53, p=0.046) but not with HR (r=− 0.16, p=0.59) and occurred irrespective of AMS at high altitude.ConclusionHigh altitude exposure leads to decreased CS. Changes occur independent of AMS. This finding is of clinical importance to trekkers and mountaineers exposed to high altitude as visual processing in particular under mesopic conditions at dusk and dawn is altered. Furthermore, it provides novel insight into hypoxia related changes in CS function.

scholarly journals Sex-Dependent Association Between Early Morning Ambulatory Blood Pressure Variations and Acute Mountain Sickness

2021 ◽  
Vol 12 ◽  
Author(s):  
Renzheng Chen ◽  
Jie Yang ◽  
Chuan Liu ◽  
Mengjia Sun ◽  
Jingbin Ke ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Propensity Score ◽  
Prospective Study ◽  
Acute Mountain Sickness ◽  
Early Morning ◽  
Demographic Parameters ◽  
Female Group ◽  
Males And Females ◽  
Mountain Sickness ◽  
The Relationship

BackgroundAcute high altitude (HA) exposure elicits blood pressure (BP) responses in most subjects, and some of them suffer from acute mountain sickness (AMS). However, a 24-h ambulatory BP (ABP) change and the correlation with the occurrence of AMS in different sexes are still unclear.ObjectivesThis prospective study aimed to investigate HA induced BP responses in males and females and the relationship between AMS and 24-h ABP.MethodsForty-six subjects were matched according to demographic parameters by propensity score matching with a ratio of 1:1. All the subjects were monitored by a 24-h ABP device; the measurement was one period of 24 h BP. 2018 Lake Louise questionnaire was used to evaluate AMS.ResultsBoth the incidence of AMS (14 [60.9%] vs. 5 [21.7%], P = 0.007) and headache (18 [78.3%] vs. 8 [34.8%], P = 0.003) were higher in females than in males. All subjects showed an elevated BP in the early morning [morning systolic BP (SBP), 114.72 ± 13.57 vs. 120.67 ± 11.10, P = 0.013]. The elevation of morning SBP variation was more significant in females than in males (11.95 ± 13.19 vs. −0.05 ± 14.49, P = 0.005), and a higher morning BP surge increase (4.69 ± 18.09 vs. −9.66 ± 16.96, P = 0.005) was observed after acute HA exposure in the female group. The increase of morning SBP was associated with AMS occurrence (R = 0.662, P &lt; 0.001) and AMS score (R = 0.664, P = 0.001). Among the AMS symptoms, we further revealed that the incidence (R = 0.786, P &lt; 0.001) and the severity of headache (R = 0.864, P &lt; 0.001) are closely correlated to morning SBP.ConclusionsOur study demonstrates that females are more likely to suffer from AMS than males. AMS is closely associated with elevated BP in the early morning period, which may be correlated to higher headache incidence in subjects with higher morning SBP.

scholarly journals Sympathetic Activation Does Not Affect the Cardiac and Respiratory Contribution to the Relationship between Blood Pressure and Pial Artery Pulsation Oscillations in Healthy Subjects

PLoS ONE ◽  
2015 ◽  
Vol 10 (8) ◽  
pp. e0135751 ◽  
Author(s):  
Pawel J. Winklewski ◽  
Yurii Tkachenko ◽  
Kamila Mazur ◽  
Jacek Kot ◽  
Marcin Gruszecki ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Healthy Subjects ◽  
Sympathetic Activation ◽  
Pial Artery ◽  
The Relationship

scholarly journals The prognostic value of arginase-1 and glypican-3 expression levels in patients after surgical intrahepatic cholangiocarcinoma resection

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Zeyuan Qiang ◽  
Haofeng Zhang ◽  
Shuai Jin ◽  
Cao Yan ◽  
Zhen Li ◽  
...  
Keyword(s):  
Intrahepatic Cholangiocarcinoma ◽  
Prognostic Value ◽  
Multivariate Analyses ◽  
Clinical Information ◽  
Prognostic Biomarkers ◽  
Expression Levels ◽  
Arginase 1 ◽  
Kaplan Meier ◽  
Independent Risk Factors ◽  
The Relationship

Abstract Background The aim of this study was to investigate the prognostic value of arginase-1 (Arg-1) and glypican-3 (GPC-3) in patients with intrahepatic cholangiocarcinoma (ICC). Methods Two hundred and thirty-seven patients with ICC were included in this study. All patients had undergone radical surgery and had complete clinical information. Immunohistochemistry was used to assess the levels of Arg-1 and GPC-3 in ICC tissues. Univariate and multivariate analyses were conducted to identify independent risk factors in ICC. The relationship between Arg-1 and GPC-3 levels and patient survival was determined using the Kaplan-Meier method. Results High Arg-1 and GPC-3 expression levels were associated with poor prognosis in patients with ICC, and they could be as new prognostic biomarkers in ICC. Conclusion Arg-1 and GPC-3 can serve as independent prognostic biomarkers in ICC.

Sign in / Sign up

Export Citation Format

Share Document