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Yu S, Yang H, Wang B, Guo X, Li G, Sun Y. Nomogram for predicting risk of mild renal dysfunction among general residents from rural Northeast China. J Transl Int Med 2024; 12:244-252. [PMID: 39081277 PMCID: PMC11284527 DOI: 10.2478/jtim-2023-0003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2024] Open
Abstract
Background and objectives Cumulative evidence confirms that mild renal dysfunction (MRD) is correlated with many cardiovascular risk factors and increases cardiovascular morbidity and mortality. The purpose of this study was to establish an effective nomogram for predicting the risk of MRD in the rural population of Northeast China. Methods We analyzed the reports of 4944 subjects from the Northeast China Rural Cardiovascular Health Study (NCRCHS). All the participants completed the questionnaires, anthropometric measurements, and blood tests during the baseline study (2012-2013) and the follow-up study during 2015-2017 (an average of 4.6 years). The Chronic Kidney Disease Epidemiology (CKD-EPI) equation was used to calculate the estimated glomerular filtration rate (eGFR), and eGFR in the range of 60-90 mL/min/1.73m2 was defined as MRD. Results The study revealed that a total of 889 subjects (18.0%) had MRD. Multivariate logistic analysis showed that annual income, abdominal obesity, hypertension, hyperglycemia, and frequent tea consumption were the independent risk factors (P < 0.05) for MRD. Thereafter, a nomogram with an area under the receiver operating characteristic curve (AUC) of 0.705 was constructed to accurately predict MRD. The calibration plot also showed an excellent consistency between the probability of prediction and observation. Conclusion We constructed a nomogram based on epidemiological data, which could provide an individual prediction of MRD with good accuracy.
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Affiliation(s)
- Shasha Yu
- Department of Cardiology, First Hospital of China Medical University, Shenyang110001, Liaoning Province, China
| | - Hongmei Yang
- Department of Cardiology, First Hospital of China Medical University, Shenyang110001, Liaoning Province, China
| | - Bo Wang
- Department of Cardiology, First Hospital of China Medical University, Shenyang110001, Liaoning Province, China
| | - Xiaofan Guo
- Department of Cardiology, First Hospital of China Medical University, Shenyang110001, Liaoning Province, China
| | - Guangxiao Li
- Department of Clinical Epidemiology, Institute of Cardiovascular Diseases, First Hospital of China Medical University, Shenyang110001, Liaoning Province, China
| | - Yingxian Sun
- Department of Cardiology, First Hospital of China Medical University, Shenyang110001, Liaoning Province, China
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Di Bonito P, Mozzillo E, Rosanio FM, Maltoni G, Piona CA, Franceschi R, Ripoli C, Ricciardi MR, Tornese G, Arnaldi C, Iovane B, Iafusco D, Zanfardino A, Suprani T, Savastio S, Cherubini V, Tiberi V, Piccinno E, Schiaffini R, Delvecchio M, Casertano A, Maffeis C, Franzese A. Albuminuric and non-albuminuric reduced eGFR phenotypes in youth with type 1 diabetes: Factors associated with cardiometabolic risk. Nutr Metab Cardiovasc Dis 2021; 31:2033-2041. [PMID: 34083127 DOI: 10.1016/j.numecd.2021.03.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 03/21/2021] [Accepted: 03/23/2021] [Indexed: 01/11/2023]
Abstract
BACKGROUND AND AIM Albuminuria and reduced eGFR are hallmarks of Diabetic Kidney Disease in adults. Our aim was to analyze factors associated with albuminuric and non-albuminuric mildly reduced eGFR phenotypes in youths with type 1 diabetes. METHODS AND RESULTS This multicenter cross-sectional study included 1549 youths (age 5-17 years) with type 1 diabetes enrolled at 14 Italian Pediatric Diabetes Centers. Albuminuria, creatinine, glycosylated hemoglobin (HbA1c), lipids, blood pressure (BP), neutrophils (N) and lymphocytes (L) count were analyzed. Uric acid (UA) was available in 848 individuals. Estimated GFR (eGFR) was calculated using bedside Schwartz's equation. The sample was divided in three phenotypes: 1) normoalbuminuria and eGFR ≥90 mL/min/1.73 m2 (reference category, n = 1204), 2) albuminuric and normal GFR phenotype (n = 106), 3) non-albuminuric mildly reduced GFR (MRGFR) phenotype (eGFR 60-89 mL/min/1.73 m2, n = 239). Albuminuric and non-albuminuric reduced eGFR phenotypes were significantly associated with autoimmune thyroiditis (P =0.028 and P=0.044, respectively). Albuminuric phenotype showed high risk of high HbA1c (P=0.029), high BP (P < 0.001), and low HDL-C (P =0.045) vs reference category. Non-albuminuric MRGFR phenotype showed high risk of high BP (P < 0.0001), low HDL-C (P =0.042), high Triglycerides/HDL-C ratio (P =0.019), and high UA (P < 0.0001) vs reference category. CONCLUSION Non albuminuric MRGFR phenotype is more prevalent than albuminuric phenotype and shows a worst cardiometabolic risk (CMR) profile). Both phenotypes are associated with autoimmune thyroiditis. Our data suggest to evaluate both albuminuria and eGFR earlier in type 1 diabetes to timely identify young people with altered CMR profile.
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Affiliation(s)
- Procolo Di Bonito
- Department of Internal Medicine, "S. Maria Delle Grazie", Pozzuoli Hospital, Naples, Italy
| | - Enza Mozzillo
- Department of Translational Medical Science, Section of Pediatrics, Regional Center of Pediatric Diabetes, Federico II University of Naples, Naples, Italy.
| | - Francesco M Rosanio
- Department of Translational Medical Science, Section of Pediatrics, Regional Center of Pediatric Diabetes, Federico II University of Naples, Naples, Italy
| | - Giulio Maltoni
- Department of Woman, Child and Urological Diseases, S. Orsola-Malpighi University Hospital, Bologna, Italy
| | - Claudia A Piona
- Pediatric Diabetes and Metabolic Disorders Unit, University of Verona, Verona, Italy
| | | | - Carlo Ripoli
- Pediatric Diabetology Unit, Pediatric and Microcytemia Department, AO Brotzu, Cagliari, Italy
| | - Maria R Ricciardi
- Pediatric Diabetology Unit, Pediatric and Microcytemia Department, AO Brotzu, Cagliari, Italy
| | - Gianluca Tornese
- Institute for Maternal and Child Health IRCCS 'Burlo Garofolo', Trieste, Italy
| | | | - Brunella Iovane
- Regional Diabetes Center, Children Hospital "Pietro Barilla", University Hospital of Parma, Parma, Italy
| | - Dario Iafusco
- Department of Woman, Child and General and Specialized Surgery, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Angela Zanfardino
- Department of Woman, Child and General and Specialized Surgery, University of Campania "Luigi Vanvitelli", Naples, Italy
| | | | - Silvia Savastio
- SCDU of Pediatrics, University Hospital Maggiore Della Carità, Novara, Italy
| | - Valentino Cherubini
- Regional Center for Diabetes in Children and Adolescents, Department of Woman and Child Health, AOU Salesi Hospital, Ancona, Italy
| | - Valentino Tiberi
- Regional Center for Diabetes in Children and Adolescents, Department of Woman and Child Health, AOU Salesi Hospital, Ancona, Italy
| | - Elvira Piccinno
- Metabolic Diseases, Clinical Genetics and Diabetology Unit, Giovanni XXIII Children's Hospital, Bari, Italy
| | | | - Maurizio Delvecchio
- Metabolic Diseases, Clinical Genetics and Diabetology Unit, Giovanni XXIII Children's Hospital, Bari, Italy
| | - Alberto Casertano
- Department of Translational Medical Science, Section of Pediatrics, Regional Center of Pediatric Diabetes, Federico II University of Naples, Naples, Italy
| | - Claudio Maffeis
- Pediatric Diabetes and Metabolic Disorders Unit, University of Verona, Verona, Italy
| | - Adriana Franzese
- Department of Translational Medical Science, Section of Pediatrics, Regional Center of Pediatric Diabetes, Federico II University of Naples, Naples, Italy
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Fujita H, Matsuoka S, Awazu M. Visit-to-visit blood pressure variability in children and adolescents with renal disease. Clin Exp Nephrol 2018. [PMID: 29536392 DOI: 10.1007/s10157-018-1557-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Increase in blood pressure (BP) variability (BPV) is associated with cardiovascular events, target organ damage, and arterial stiffness in adults. We previously reported that 24-h BPV may be associated with arterial stiffness and underlie white-coat hypertension (WCH). In this study, we examined whether visit-to-visit variability (VVV) could predict WCH and whether VVV correlated with eGFR, eGFR slope, and albuminuria/proteinuria in children and adolescents with renal diseases. METHODS VVV was determined as average real variability of office BP measurements between visits, and 24-h BPV as the standard deviation of 24-h ambulatory BP. In 35 renal patients (25 boys and 10 girls, 7-18 years of age), divided into normotension (NT), WCH, and hypertension (HTN), the relationships between VVV and 24-h BPV and VVV in each BP category were studied. In separate 48 renal patients (24 boys and 24 girls, 2-18 years of age), the correlation between VVV and eGFR, eGFR slope, urine albumin or protein excretion was examined. RESULTS Systolic VVV was significantly correlated with systolic office BP index. There was no correlation between VVV and 24-h BPV or 24-h pulse pressure. In addition, VVV was not different among NT, WCH, and HTN. Systolic VVV was significantly negatively correlated with eGFR but not with eGFR slope, albuminuria, or proteinuria. A cut-off value of systolic VVV for detecting eGFR < 60 ml/min per 1.73 m2 was 8.5. CONCLUSION VVV could not predict WCH. Systolic VVV correlated with eGFR but not with eGFR slope, albuminuria/proteinuria. Increased VVV could be a marker of decreased eGFR.
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Affiliation(s)
- Hisayo Fujita
- Department of Pediatrics, Tokyo Medical Center, Tokyo, Japan
| | | | - Midori Awazu
- Department of Pediatrics, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan.
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Mena LJ, Felix VG, Melgarejo JD, Maestre GE. 24-Hour Blood Pressure Variability Assessed by Average Real Variability: A Systematic Review and Meta-Analysis. J Am Heart Assoc 2017; 6:e006895. [PMID: 29051214 PMCID: PMC5721878 DOI: 10.1161/jaha.117.006895] [Citation(s) in RCA: 130] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 08/29/2017] [Indexed: 12/31/2022]
Abstract
BACKGROUND Although 24-hour blood pressure (BP) variability (BPV) is predictive of cardiovascular outcomes independent of absolute BP levels, it is not regularly assessed in clinical practice. One possible limitation to routine BPV assessment is the lack of standardized methods for accurately estimating 24-hour BPV. We conducted a systematic review to assess the predictive power of reported BPV indexes to address appropriate quantification of 24-hour BPV, including the average real variability (ARV) index. METHODS AND RESULTS Studies chosen for review were those that presented data for 24-hour BPV in adults from meta-analysis, longitudinal or cross-sectional design, and examined BPV in terms of the following issues: (1) methods used to calculate and evaluate ARV; (2) assessment of 24-hour BPV determined using noninvasive ambulatory BP monitoring; (3) multivariate analysis adjusted for covariates, including some measure of BP; (4) association of 24-hour BPV with subclinical organ damage; and (5) the predictive value of 24-hour BPV on target organ damage and rate of cardiovascular events. Of the 19 assessed studies, 17 reported significant associations between high ARV and the presence and progression of subclinical organ damage, as well as the incidence of hard end points, such as cardiovascular events. In all these cases, ARV remained a significant independent predictor (P<0.05) after adjustment for BP and other clinical factors. In addition, increased ARV in systolic BP was associated with risk of all cardiovascular events (hazard ratio, 1.18; 95% confidence interval, 1.09-1.27). Only 2 cross-sectional studies did not find that high ARV was a significant risk factor. CONCLUSIONS Current evidence suggests that ARV index adds significant prognostic information to 24-hour ambulatory BP monitoring and is a useful approach for studying the clinical value of BPV.
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Affiliation(s)
- Luis J Mena
- Academic Unit of Computing, Master Program in Applied Sciences, Universidad Politecnica de Sinaloa, Mazatlan, Mexico
| | - Vanessa G Felix
- Academic Unit of Computing, Master Program in Applied Sciences, Universidad Politecnica de Sinaloa, Mazatlan, Mexico
| | - Jesus D Melgarejo
- Neurosciences Laboratory, Biological Research Institute and Research Institute of Cardiovascular Diseases, Faculty of Medicine, Universidad del Zulia, Maracaibo, Venezuela
| | - Gladys E Maestre
- Neurosciences Laboratory, Biological Research Institute and Research Institute of Cardiovascular Diseases, Faculty of Medicine, Universidad del Zulia, Maracaibo, Venezuela
- Department of Biomedical Sciences, Division of Neurosciences, University of Texas Rio Grande Valley School of Medicine, Brownsville, TX
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Hu W, Wu XJ, Ni YJ, Hao HR, Yu WN, Zhou HW. Metabolic syndrome is independently associated with a mildly reduced estimated glomerular filtration rate: a cross-sectional study. BMC Nephrol 2017; 18:192. [PMID: 28610620 PMCID: PMC5470228 DOI: 10.1186/s12882-017-0597-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Accepted: 05/19/2017] [Indexed: 01/28/2023] Open
Abstract
Background Association between metabolic syndrome (MS) and mildly reduced estimated glomerular filtration rates (eGFRs) remains unclear. Therefore, we aimed to evaluate the association between MS and a mildly reduced eGFR in Chinese adults. Methods Anthropometric and biochemical examinations were performed in 2992 individuals. The eGFR was calculated from the creatinine level. MS was defined according to the Adult Treatment Panel III criteria as the presence of three or more risk factors. Mildly reduced eGFR was defined as a value between 60 and 90 mL/min/1.73 m2. Multiple linear regression and multiple logistic regression analysis were used to evaluate association between metabolic syndrome and estimate glomerular filtration rate. Results After adjusting for several potential confounders, the participants with MS showed a 1.29-fold increased odds ratio for a mildly reduced eGFR compared with those without MS. Additionally, the odds ratios (and 95% confidence intervals (CIs)) for mildly reduced eGFR in participants with elevated triglycerides (TG), decreased high-density lipoprotein (HDL), obesity and elevated fasting blood glucose (FPG) after multivariable adjustment were 1.25 (1.05–1.49), 1.23 (1.03–1.48), 1.22 (1.03–1.45) and 0.64 (0.52–0.78), respectively. The odds ratios (95% CIs) for hyperfiltration in participants with elevated FPG and HbA1c levels after multivariable adjustment were 1.53 (1.30–1.81) and 2.86 (2.00–4.09), respectively. Conclusions MS is associated with an increased risk of a mildly reduced eGFR in the Chinese population, and several individual components of MS have different impacts on eGFR levels. MS had dual roles on renal damage. Trial registration ChiCTR-TRC-14005029. Registered 28 July 2014. Electronic supplementary material The online version of this article (doi:10.1186/s12882-017-0597-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Wen Hu
- Department of Endocrinology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210029, China.,Department of Endocrinology and Metabolism, Huai'an Hospital Affiliated to Xuzhou Medical University and Huai'an Second People's Hospital, Huai'an, 223001, China
| | - Xiao-Juan Wu
- Department of Endocrinology and Metabolism, Huai'an Hospital Affiliated to Xuzhou Medical University and Huai'an Second People's Hospital, Huai'an, 223001, China
| | - Yao-Jun Ni
- Department of Cardiothoracic Surgery, Hospital Affiliated to Nanjing Medical University and Huai'an First People's Hospital, Huai'an, 223001, China
| | - Hai-Rong Hao
- Department of Endocrinology and Metabolism, Huai'an Hospital Affiliated to Xuzhou Medical University and Huai'an Second People's Hospital, Huai'an, 223001, China
| | - Wei-Nan Yu
- Department of Endocrinology and Metabolism, Huai'an Hospital Affiliated to Xuzhou Medical University and Huai'an Second People's Hospital, Huai'an, 223001, China
| | - Hong-Wen Zhou
- Department of Endocrinology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210029, China. .,Department of Endocrinology, The First Affiliated Hospital of Nanjing Medical University, No. 300 Guangzhou Road, Nanjing, 210029, China.
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CROMWELL CHRISTINAM, AICHELE KRISTINR, OAKMAN JOYANNE, NEAL MICHAELP, LENZO JESSICAM, PEREZ AVERYN, BYE NAOMIL, SANTANIELLO ERICAL, HILL JESSICAA, EVANS RACHELC, THIELE KARLAA, CHAVIS LAURENN, GETTY ALLYSONK, WISDO TIAR, FEAIRHELLER DEBORAHL. Carotid Artery IMT, Blood Pressure, and Cardiovascular Risk Factors in Males and Females. INTERNATIONAL JOURNAL OF EXERCISE SCIENCE 2016; 9:482-490. [PMID: 27766134 PMCID: PMC5065332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
Previous studies have investigated carotid artery intima-media thickness (IMT) and blood pressure and found a direct correlation between the two. It is known that adult females have better cardiovascular health than males until a certain stage of life, yet limited research has examined gender differences in vascular function. Thus, the purpose of this study was to investigate vascular structure and function, blood pressure, and blood glucose/cholesterol levels in relation to gender differences in young healthy adults. On three separate days, 44 adults (26.30 ± 11.9yrs; 24M, 20F) completed a carotid IMT ultrasound, a flow-mediated dilation (FMD), a fasted glucose and cholesterol test, a 24hr ambulatory blood pressure monitoring, a VO2max test, and a body composition measurement. Females had lower systolic blood pressure, lower diastolic blood pressure, lower LDL/HDL ratios, lower body mass index, a higher HDL count, and lower plasma glucose levels than males (p < 0.05 for all), all of which suggest better cardiovascular health. However, we found no gender differences in vascular health measures, IMT and FMD. Our results suggest that while young adult females have better cardiovascular health than males, endothelial function may not yet be affected in the young adult years.
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Vascular Health in American Football Players: Cardiovascular Risk Increased in Division III Players. Int J Vasc Med 2016; 2016:6851256. [PMID: 26904291 PMCID: PMC4745823 DOI: 10.1155/2016/6851256] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Revised: 12/29/2015] [Accepted: 01/03/2016] [Indexed: 01/17/2023] Open
Abstract
Studies report that football players have high blood pressure (BP) and increased cardiovascular risk. There are over 70,000 NCAA football players and 450 Division III schools sponsor football programs, yet limited research exists on vascular health of athletes. This study aimed to compare vascular and cardiovascular health measures between football players and nonathlete controls. Twenty-three athletes and 19 nonathletes participated. Vascular health measures included flow-mediated dilation (FMD) and carotid artery intima-media thickness (IMT). Cardiovascular measures included clinic and 24 hr BP levels, body composition, VO2 max, and fasting glucose/cholesterol levels. Compared to controls, football players had a worse vascular and cardiovascular profile. Football players had thicker carotid artery IMT (0.49 ± 0.06 mm versus 0.46 ± 0.07 mm) and larger brachial artery diameter during FMD (4.3 ± 0.5 mm versus 3.7 ± 0.6 mm), but no difference in percent FMD. Systolic BP was significantly higher in football players at all measurements: resting (128.2 ± 6.4 mmHg versus 122.4 ± 6.8 mmHg), submaximal exercise (150.4 ± 18.8 mmHg versus 137.3 ± 9.5 mmHg), maximal exercise (211.3 ± 25.9 mmHg versus 191.4 ± 19.2 mmHg), and 24-hour BP (124.9 ± 6.3 mmHg versus 109.8 ± 3.7 mmHg). Football players also had higher fasting glucose (91.6 ± 6.5 mg/dL versus 86.6 ± 5.8 mg/dL), lower HDL (36.5 ± 11.2 mg/dL versus 47.1 ± 14.8 mg/dL), and higher body fat percentage (29.2 ± 7.9% versus 23.2 ± 7.0%). Division III collegiate football players remain an understudied population and may be at increased cardiovascular risk.
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Relationship between blood pressure variability and renal activity of the renin-angiotensin system. J Hum Hypertens 2015. [PMID: 26223347 DOI: 10.1038/jhh.2015.71] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Local renin-angiotensin system (RAS) activity in the kidneys is a pathogenetic factor in patients with primary hypertension. This study aimed to determine the relationship between local kidney RAS activity and blood pressure variability, as the literature currently lacks any such study. The study included 73 consecutive primary hypertensive patients. All patients underwent 24-h ambulatory blood pressure monitoring to determine the average real variability (ARV) index, as an indicator of blood pressure variability. Local RAS activity was determined using the urine angiotensinogen/creatinine (UAGT/UCre) ratio. The high UAGT/UCre ratio group had significantly higher mean 24-h systolic ARV than the low UAGT/UCre ratio group (13.2±3.4 vs 11.0±2.6, P=0.003). Similarly, the high UAGT/UCre ratio group had significantly higher mean 24-h diastolic ARV than the low UAGT/UCre ratio group (10.8±3.2 vs 8.7±2.2, P=0.001). Multivariate regression analysis showed that Log(UAGT/UCre) was an independent predictor of both 24-h diastolic ARV and 24-h systolic ARV. Local RAS activity in the kidneys might have a role in blood pressure variability. On the basis of these findings, we think that additional prospective studies are needed to more fully discern the effect of local RAS activity on blood pressure variability.
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Feairheller DL, Diaz KM, Kashem MA, Thakkar SR, Veerabhadrappa P, Sturgeon KM, Ling C, Williamson ST, Kretzschmar J, Lee H, Grimm H, Babbitt DM, Vin C, Fan X, Crabbe DL, Brown MD. Effects of moderate aerobic exercise training on vascular health and blood pressure in African Americans. J Clin Hypertens (Greenwich) 2014; 16:504-10. [PMID: 24779748 DOI: 10.1111/jch.12328] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Revised: 03/17/2014] [Accepted: 03/20/2014] [Indexed: 01/22/2023]
Abstract
As healthcare progresses toward individualized medicine, understanding how different racial groups respond to lifestyle interventions is valuable. It is established that African Americans have disproportionate levels of cardiovascular disease and impaired vascular health, and clinical practice guidelines suggest lifestyle interventions as the first line of treatment. Recently, the authors reported that 6 months of aerobic exercise improved inflammatory markers, flow-mediated dilation (FMD), and levels of circulating endothelial microparticles (EMPs) in African American adults. This study is a subgroup analysis of the aerobic exercise-induced changes in vascular health and blood pressure (BP) measures, including carotid artery intima-media thickness (IMT), nitroglycerin-mediated dilation (NMD), ambulatory BP, and office BP. Sedentary African American adults (53.4±6.2 years; 21 women and 5 men) showed improved vascular health but no change in BP. Carotid artery IMT decreased 6.4%, plasma nitric oxide levels increased 76.6%, plasma EMP levels decreased, percentage of FMD increased 59.6%, and FMD/NMD ratio increased 36.2% (P<.05 for all). Six months of aerobic exercise training is sufficient to elicit improvements in vascular structure and function in African Americans, even without improvements in BP measures or NMD (ie, smooth muscle function). To our knowledge, this is the first study to report such findings in African Americans.
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Affiliation(s)
- Deborah L Feairheller
- Hypertension and Endothelial Function with Aerobic and Resistance Training (HEART) Laboratory, Health & Exercise Physiology Department, Ursinus College, Collegeville, PA; Hypertension, Molecular and Applied Physiology Laboratory, Department of Kinesiology, Temple University, Philadelphia, PA
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Visit-to-visit and 24-h blood pressure variability: association with endothelial and smooth muscle function in African Americans. J Hum Hypertens 2013; 27:671-7. [PMID: 23615389 PMCID: PMC3745784 DOI: 10.1038/jhh.2013.33] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2012] [Revised: 03/23/2013] [Accepted: 03/27/2013] [Indexed: 11/30/2022]
Abstract
The purpose of this study was to investigate the association of visit-to-visit and 24-h BP variability with markers of endothelial injury and vascular function. We recruited 72 African Americans who were non-diabetic, non-smoking, and free of cardiovascular and renal disease. Office BP was measured at three visits and 24-h ambulatory BP monitoring was conducted to measure visit-to-visit and 24-h BP variability, respectively. The 5-min time-course of brachial artery flow-mediated dilation and nitroglycerin-mediated dilation were assessed as measures of endothelial and smooth muscle function. Fasted blood samples were analyzed for circulating endothelial microparticles. Significantly lower CD31+CD42− endothelial microparticles were found in participants with high visit-to-visit SBP variability or high 24-h DBP variability. Participants with high visit-to-visit DBP variability had significantly lower flow-mediated dilation and higher nitroglycerin-mediated dilation at multiple time-points. When analyzed as continuous variables, 24-h mean arterial pressure variability was inversely associated with CD62+ endothelial microparticles; visit-to-visit DBP variability was inversely associated with flow-mediated dilation normalized by smooth muscle function and was positively associated with nitroglycerin-mediated dilation; and 24-h DBP variability was positively associated with nitroglycerin-mediated dilation. All associations were independent of age, gender, BMI, and mean BP. In conclusion, in this cohort of African Americans visit-to-visit and 24-h BP variability were associated with measures of endothelial injury, endothelial function, and smooth muscle function. These results suggest that BP variability may influence the pathogenesis of cardiovascular disease, in part, through influences on vascular health.
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Diaz KM, Veerabhadrappa P, Kashem MA, Feairheller DL, Sturgeon KM, Williamson ST, Crabbe DL, Brown MD. Relationship of visit-to-visit and ambulatory blood pressure variability to vascular function in African Americans. Hypertens Res 2011; 35:55-61. [PMID: 21814215 DOI: 10.1038/hr.2011.135] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Visit-to-visit clinic blood pressure variability (BPV) and 24-h BPV have both been identified as independent risk factors for cardiovascular (CV) morbidity and mortality; however, the mechanisms contributing to the increased CV risk as yet are unclear. The purpose of this study was to assess the relationship between BPV and endothelial function in a cohort of putatively healthy African Americans. A total of 36 African Americans who were sedentary, non-diabetic, non-smoking, free of CV and renal disease and not on antihypertensive medication followed an American Heart Association low fat, low salt diet for 6 weeks. Upon completion of the 6-week dietary stabilization period, participants underwent 24-h ambulatory BP monitoring and had their office blood pressure (BP) measured on 3 separate days. Right brachial artery diameter was assessed at rest, during reactive hyperemia (flow-mediated vasodilation: FMD), and after nitroglycerin administration (nitroglycerin-mediated vasodilation: NMD). Participants classified as having decreased endothelial function according to either %FMD or the FMD/NMD ratio had significantly higher 24-h BPV and a trend for higher visit-to-visit BPV when compared with participants with normal endothelial function. Continuous variable analyses revealed a significant positive association between NMD and 24-h diastolic BPV (DBPV). Visit-to-visit systolic BPV (SBPV), 24-h SBPV and 24-h DBPV were all negatively associated with the FMD/NMD ratio. All relationships remained significant after adjustment for age, body mass index and mean BP levels. These results may suggest that BPV is increased in African Americans with decreased endothelial function and is associated with the vascular smooth muscle response to nitric oxide.
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Affiliation(s)
- Keith M Diaz
- Hypertension, Molecular and Applied Physiology Laboratory, Department of Kinesiology, College of Health Professions, Temple University, Philadelphia, PA 19122, USA.
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