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Rioux AV, Nsimba-Batomene TR, Slimani S, Bergeron NAD, Gravel MAM, Schreiber SV, Fiola MJ, Haydock L, Garneau AP, Isenring P. Navigating the multifaceted intricacies of the Na +-Cl - cotransporter, a highly regulated key effector in the control of hydromineral homeostasis. Physiol Rev 2024; 104:1147-1204. [PMID: 38329422 DOI: 10.1152/physrev.00027.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 01/01/2024] [Accepted: 02/03/2024] [Indexed: 02/09/2024] Open
Abstract
The Na+-Cl- cotransporter (NCC; SLC12A3) is a highly regulated integral membrane protein that is known to exist as three splice variants in primates. Its primary role in the kidney is to mediate the cosymport of Na+ and Cl- across the apical membrane of the distal convoluted tubule. Through this role and the involvement of other ion transport systems, NCC allows the systemic circulation to reclaim a fraction of the ultrafiltered Na+, K+, Cl-, and Mg+ loads in exchange for Ca2+ and [Formula: see text]. The physiological relevance of the Na+-Cl- cotransport mechanism in humans is illustrated by several abnormalities that result from NCC inactivation through the administration of thiazides or in the setting of hereditary disorders. The purpose of the present review is to discuss the molecular mechanisms and overall roles of Na+-Cl- cotransport as the main topics of interest. On reading the narrative proposed, one will realize that the knowledge gained in regard to these themes will continue to progress unrelentingly no matter how refined it has now become.
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Affiliation(s)
- A V Rioux
- Department of Medicine, Nephrology Research Group, Laval University, Quebec City, Quebec, Canada
| | - T R Nsimba-Batomene
- Department of Medicine, Nephrology Research Group, Laval University, Quebec City, Quebec, Canada
| | - S Slimani
- Department of Medicine, Nephrology Research Group, Laval University, Quebec City, Quebec, Canada
| | - N A D Bergeron
- Department of Medicine, Nephrology Research Group, Laval University, Quebec City, Quebec, Canada
| | - M A M Gravel
- Department of Medicine, Nephrology Research Group, Laval University, Quebec City, Quebec, Canada
| | - S V Schreiber
- Department of Medicine, Nephrology Research Group, Laval University, Quebec City, Quebec, Canada
| | - M J Fiola
- Department of Medicine, Nephrology Research Group, Laval University, Quebec City, Quebec, Canada
| | - L Haydock
- Department of Medicine, Nephrology Research Group, Laval University, Quebec City, Quebec, Canada
- Service de Néphrologie-Transplantation Rénale Adultes, Hôpital Necker-Enfants Malades, AP-HP, INSERM U1151, Université Paris Cité, Paris, France
| | - A P Garneau
- Department of Medicine, Nephrology Research Group, Laval University, Quebec City, Quebec, Canada
- Service de Néphrologie-Transplantation Rénale Adultes, Hôpital Necker-Enfants Malades, AP-HP, INSERM U1151, Université Paris Cité, Paris, France
| | - P Isenring
- Department of Medicine, Nephrology Research Group, Laval University, Quebec City, Quebec, Canada
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Dahle N, Ärnlöv J, Leppert J, Hedberg P. Nondipping blood pressure pattern predicts cardiovascular events and mortality in patients with atherosclerotic peripheral vascular disease. Vasc Med 2023; 28:274-281. [PMID: 37036102 PMCID: PMC10408241 DOI: 10.1177/1358863x231161655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
Abstract
BACKGROUND Patients with peripheral vascular disease (PVD) are often underdiagnosed and undertreated. Nocturnal nondipping blood pressure (BP) pattern, as diagnosed by ambulatory BP monitoring (ABPM), is associated with increased cardiovascular risk, but has not been studied in patients with PVD. We aimed to investigate if a nondipping BP pattern predicts cardiovascular events or all-cause death in outpatients with PVD. METHODS Consecutive outpatients with carotid or lower-extremity PVD were examined with 24-hour ABPM (n = 396). Nondipping was defined as a < 10% fall in systolic BP level during night-time. We used Cox regression models adjusting for potential confounders. We also evaluated the incremental prognostic value of dipping status in the COPART risk score. Our primary composite outcome was cardiovascular events or all-cause death. RESULTS In the cohort (mean age 70; 40% women), 137 events occurred during a 5.1-year median follow-up; incident rate of 7.35 events per 100 person-years. Nondipping was significantly associated with outcome (hazard ratio 1.55, 95% CI 1.07-2.26, p = 0.021) in a fully adjusted model. When adding nondipping to the risk markers in the COPART risk score, the model fit significantly improved (χ2 7.91, p < 0.005) and the C-statistic increased from 0.65 to 0.67. CONCLUSION In a cohort of outpatients with PVD, nondipping was an independent risk factor for future cardiovascular events or mortality and seemed to be a strong predictor in patients with carotid artery disease but not in lower-extremity PVD. Additional studies are needed to evaluate the clinical utility of ABPM for improved prevention in these high-risk patients. (ClinicalTrials.gov Identifier: NCT01452165).
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Affiliation(s)
- Nina Dahle
- Center for Clinical Research Dalarna, Uppsala University, Falun, Sweden
- Primary Health Care Center Britsarvet-Grycksbo, County of Dalarna, Falun, Sweden
| | - Johan Ärnlöv
- Department of Neurobiology, Division of Family Medicine and Primary Care, Care Sciences and Society, Karolinska Institutet, Huddinge, Sweden
- School of Health and Social Studies, Dalarna University, Falun, Sweden
| | - Jerzy Leppert
- Center for Clinical Research, Uppsala University, Västmanland County Hospital, Västerås, Sweden
| | - Pär Hedberg
- Center for Clinical Research, Uppsala University, Västmanland County Hospital, Västerås, Sweden
- Department of Clinical Physiology, Västmanland County Hospital, Västerås, Sweden
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3
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Habas E, Akbar RA, Alfitori G, Farfar KL, Habas E, Errayes N, Habas A, Al Adab A, Rayani A, Geryo N, Elzouki ANY. Effects of Nondipping Blood Pressure Changes: A Nephrologist Prospect. Cureus 2023; 15:e42681. [PMID: 37649932 PMCID: PMC10464654 DOI: 10.7759/cureus.42681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/30/2023] [Indexed: 09/01/2023] Open
Abstract
Blood pressure (BP) variations depend on various internal, environmental, and behavioral factors. BP fluctuations occur both in normotensive and hypertensive people. Although it fluctuates over the 24-hr day and night, the morning BP increases after waking up and declines throughout sleep. It is typical for BP to decrease by 10% to 20%, while sleeping, known as dipping BP. However, if there is no decrease in nighttime mean systolic BP or a drop of less than 10 mmHg, it is called nondipping BP. Conversely, reverse dipping BP means an increase in mean systolic BP instead of a drop during the night. Reverse dipping is observed in hypertension (HTN), diabetes mellitus (DM), chronic kidney disease (CKD), and obstructive sleep apnea (OSA) syndrome. The introduction of ambulatory BP monitoring (ABPM) led to the emergence of identifying normal and elevated BP patterns. Non-dipping BP increases the risk of cardiovascular system (CVS) complications such as left ventricular hypertrophy, proteinuria, glomerular filtration rate (GFR) reduction, and CKD progression. A loss or blunting of the normal BP profile is recognized as a deleterious variant, and restoring abnormal BP patterns has been reported to significantly impact end-organ damage, morbidity, and mortality. In this non-systematic clinically-oriented, comprehensive review, we aim to update the BP variables and the pathophysiology of nondipping BP and point out the areas which need more investigation from a nephrology perspective because the nondipping BP increases the risk of proteinuria, GFR reduction, and CKD progression. A literature search of PubMed, Google, EMBASE, and Google Scholar was conducted. Checks of selected papers and relevant reviews complemented the electronic search. With improved BP measurement methods, the physiology of BP profile variations is readily detectable during the day and night. A nondipping BP profile is a distinct BP pattern that may have significant end-organ damage effects and therapeutic importance for nephrologists. The pathophysiology of the nondipping BP variant must be clarified to prevent complications, and further investigations are required. Furthermore, there is debate about the best BP index to utilize: systolic BP, diastolic BP, mean arterial pressure, or a mixture of all. All these areas are important and need new research projects.
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Affiliation(s)
| | - Raza A Akbar
- Internal Medicine, Hamad General Hospital, Doha, QAT
| | | | | | - Eshrak Habas
- Internal Medicine, Tripoli University, Tripoli, LBY
| | - Nada Errayes
- Medical Education, University of Lincoln, Lincoln, GBR
| | - Aml Habas
- Renal and Dialysis, Tripoli Pediatric Hospital, Tripoli, LBY
| | - Aisha Al Adab
- Pulmonary Medicine, Hamad General Hospital, Doha, QAT
| | - Amnna Rayani
- Hemato-Oncology, Tripoli Pediatric Hospital, Tripoli University, Tripoli, LBY
| | - Nagat Geryo
- Internal Medicine, Hamad General Hospital, Doha, QAT
| | - Abdel-Naser Y Elzouki
- Medicine, Hamad General Hospital, Doha, QAT
- Internal Medicine, Hamad Medical Corporation, Doha, QAT
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Huart J, Persu A, Lengelé JP, Krzesinski JM, Jouret F, Stergiou GS. Pathophysiology of the Nondipping Blood Pressure Pattern. Hypertension 2023; 80:719-729. [PMID: 36606502 DOI: 10.1161/hypertensionaha.122.19996] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The nondipping blood pressure (BP) pattern corresponds to a disruption in the circadian BP rhythm with an insufficient decrease in BP levels during nighttime sleep as observed using 24-hour ambulatory BP monitoring. Patients with nondipping BP pattern have poorer renal and cardiovascular outcomes, independent of their average 24-hour BP levels. The pathophysiology of nondipping BP is complex and involves numerous mechanisms: perturbations of (1) the circadian rhythm, (2) the autonomic nervous system, and (3) water and sodium regulation. This review provides an outline of the pathways potentially involved in the nondipping BP profile in different conditions. A recent hypothesis is also discussed involving the role of gut microbiota in the dipping/nondipping patterns, via the fecal diet-derived short chain fatty acids.
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Affiliation(s)
- Justine Huart
- Division of Nephrology, University of Liège Hospital (ULiège CHU), University of Liège, Belgium (J.H., J.-M.K., F.J.).,Groupe Interdisciplinaire de Génoprotéomique Appliquée (GIGA), Cardiovascular Sciences, University of Liège, Belgium (J.H., J.-M.K., F.J.)
| | - Alexandre Persu
- Division of Cardiology, Department of Cardiovascular Diseases, Cliniques Universitaires Saint-Luc and Pole of Cardiovascular Research, Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, Brussels, Belgium (A.P., J.-P.L.)
| | - Jean-Philippe Lengelé
- Division of Cardiology, Department of Cardiovascular Diseases, Cliniques Universitaires Saint-Luc and Pole of Cardiovascular Research, Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, Brussels, Belgium (A.P., J.-P.L.).,Department of Nephrology, Grand Hôpital de Charleroi, Gilly, Belgium (J.-P.L.)
| | - Jean-Marie Krzesinski
- Division of Nephrology, University of Liège Hospital (ULiège CHU), University of Liège, Belgium (J.H., J.-M.K., F.J.).,Groupe Interdisciplinaire de Génoprotéomique Appliquée (GIGA), Cardiovascular Sciences, University of Liège, Belgium (J.H., J.-M.K., F.J.)
| | - François Jouret
- Division of Nephrology, University of Liège Hospital (ULiège CHU), University of Liège, Belgium (J.H., J.-M.K., F.J.).,Groupe Interdisciplinaire de Génoprotéomique Appliquée (GIGA), Cardiovascular Sciences, University of Liège, Belgium (J.H., J.-M.K., F.J.)
| | - George S Stergiou
- Hypertension Center STRIDE-7, National and Kapodistrian University of Athens, School of Medicine, Third Department of Medicine, Sotiria Hospital, Athens, Greece (G.S.S.)
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5
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Drugescu A, Roca M, Zota IM, Costache AD, Leon-Constantin MM, Gavril OI, Gavril RS, Vasilcu TF, Mitu O, Ghiciuc CM, Mitu F. Relationships between Easily Available Biomarkers and Non-Dipper Blood Pressure Pattern in Patients with Stable Coronary Artery Disease. Life (Basel) 2023; 13:life13030640. [PMID: 36983796 PMCID: PMC10057299 DOI: 10.3390/life13030640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 02/09/2023] [Accepted: 02/23/2023] [Indexed: 03/03/2023] Open
Abstract
Introduction. Chronic inflammation plays an essential role in the pathophysiology of both arterial hypertension (HTN) and coronary artery disease (CAD), and is more pronounced in individuals with a non-dipper circadian blood pressure (BP) pattern. A non-dipping BP pattern is in turn is associated with increased cardiovascular morbi-mortality, and a higher risk of atherosclerotic events. Neutrophil to lymphocyte ratio (NLR), monocyte to lymphocyte ratio (MLR) and platelet to lymphocyte ratio (PLR) are readily available predictors of systemic inflammation and cardiovascular risk. The purpose of our study is to evaluate whether NLR, MLR and PLR can be used as cost-effective predictors of a non-dipping blood pressure pattern in hypertensive patients with stable CAD. Materials and Methods: We performed a cross-sectional retrospective analysis that included 80 patients with hypertension and stable CAD (mean age 55.51 ± 11.83 years, 71.3% male) referred to a cardiovascular rehabilitation center. All patients underwent clinical examination, 24 h ambulatory blood pressure monitoring (ABPM) and standard blood analysis. Results: Baseline demographic characteristics were similar in both groups. Patients with non-dipper pattern had significantly higher NLR (median = 2, IR (2–3), p < 0.001), MLR (median = 0.31, IR (0.23–0.39), p < 0.001) and PLR (median = 175, IR (144–215), p < 0.001) compared to dippers. Conclusion: Our results suggest that MLR and PLR are inexpensive and easily accessible biomarkers that predict a non-dipping pattern in hypertensive patients with stable CAD.
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Affiliation(s)
- Andrei Drugescu
- Medical I Department, Faculty of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Mihai Roca
- Medical I Department, Faculty of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania
- Correspondence: (M.R.); (I.M.Z.)
| | - Ioana Mădălina Zota
- Medical I Department, Faculty of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania
- Correspondence: (M.R.); (I.M.Z.)
| | - Alexandru-Dan Costache
- Medical I Department, Faculty of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania
| | | | - Oana Irina Gavril
- Medical I Department, Faculty of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Radu Sebastian Gavril
- Medical I Department, Faculty of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Teodor Flaviu Vasilcu
- Medical I Department, Faculty of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Ovidiu Mitu
- Medical I Department, Faculty of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Cristina Mihaela Ghiciuc
- Morpho-Functional Sciences II Department, Faculty of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Florin Mitu
- Medical I Department, Faculty of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania
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6
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Havelkova A, Dvorak P, Siegelova J, Dobsak P, Filipensky P, Cornelissen G. Possibilities of Interpreting the Night-to-Day Ratio Specified by 24-Hour Blood Pressure Monitoring. Int J Clin Pract 2023; 2023:6530295. [PMID: 36793927 PMCID: PMC9908340 DOI: 10.1155/2023/6530295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 11/29/2022] [Accepted: 01/20/2023] [Indexed: 02/04/2023] Open
Abstract
AIM Specify the risk rate of incorrect patient classification based on the night-to-day ratio specification from singular 24-h ABPM in comparison to the results of 7-day ABPM monitoring. MATERIALS AND METHODS 1197 24 h cycles were enrolled in 171 subjects in the study and divided into 4 groups: group 1 (40 healthy men and women without exercise), group 2 (40 healthy exercise-training men and women), group 3 (40 patients with ischemic coronary artery disease without exercise), and group 4 (51 patients with ischemic coronary artery disease following cardiovascular rehabilitation). The subject of the evaluation was the percentage rate of incorrect subject classification (dipper, nondipper, extreme dipper, and riser) based on the mean blood pressure values for 7 days and from seven independent 24-hour cycles (the mean value mode). RESULTS In the case of the individuals included in the monitored groups, the mean night-to-day ratio-based (mode for the 7 days versus the individual days of 24-hour monitoring) classification accordance ranged between 59% and 62%. Only in singular cases did the accordance reach 0% or 100%. The accordance size was not dependent on the health or cardiovascular disease (p < 0.594; 56% vs. 54%) or physical activity (p < 0.833; 55% vs. 54%) of the monitored individuals. CONCLUSION The specification of the night-to-day ratio of each individual for each day of the 7-day ABPM monitoring would be the most convenient option. In many patients, diagnosing could thus be based on the most frequently occurring values (mode specification).
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Affiliation(s)
- Alena Havelkova
- Department of Physiotherapy, Faculty of Medicine, Masaryk University, Brno, Czech Republic
- St. Anne's Teaching Hospital, Brno, Czech Republic
| | - Petr Dvorak
- Department of Biology, Faculty of Veterinary Hygiene and Ecology, University of Veterinary Sciences, Brno, Czech Republic
| | - Jarmila Siegelova
- Department of Physiotherapy, Faculty of Medicine, Masaryk University, Brno, Czech Republic
- St. Anne's Teaching Hospital, Brno, Czech Republic
| | - Petr Dobsak
- Department of Physiotherapy, Faculty of Medicine, Masaryk University, Brno, Czech Republic
- St. Anne's Teaching Hospital, Brno, Czech Republic
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7
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Erdoğan G, Arslan U, Yenerçağ M, Şahin O, Arslan H, Yavuz MB, Karagöz A, Şahin İ. The association between nondipper pattern and perioperative hypertension in patients with controlled hypertension. Blood Press Monit 2022; 27:105-112. [PMID: 34855651 DOI: 10.1097/mbp.0000000000000575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Perioperative hypertension is a frequent complication even in preoperatively normotensive or controlled hypertensive patients and there is a lack of data regarding the effect of nondipping pattern on perioperative hypertension. OBJECTIVE In this study, we aimed to investigate the possible effect of nondipping blood pressure pattern on the risk of perioperative hypertension. MATERIALS AND METHODS 234 hypertensive patients who underwent surgery with general anesthesia were evaluated prospectively. The study enrolled patients with well-controlled preoperative blood pressure. The 24-h ambulatory blood pressure monitoring results were used to classify patients as dippers and nondippers. Perioperative hypertension is defined as a systolic/diastolic arterial blood pressure greater than or equal to 160/90 mmHg or systolic blood pressure elevated by more than 20% from the patient's baseline level for more than 15 min perioperatively. RESULTS There were 61 (26%) nondipper patients [mean age: 62.1 ± 7.1 years, 25 (40.9%) men] and 173 (74%) dipper patients [mean age: 61.4 ± 8.1 years, 83 (47.9%) men]. In the nondipper group, perioperative hypertension was observed in 31 (51.3%) patients, whereas in the dipper group, 33 (19.3%) patients experienced a hypertensive attack (P < 0.001). The independent predictors of perioperative hypertension were the presence of the nondipping pattern [odds ratio (OR) 3.084; 95% confidence interval (CI) 1.831-5.195; P < 0.001], the presence of diabetes mellitus (OR 2.059; 95% CI 1.215-3.490; P = 0.007), and the number of drugs (OR 2.317; 95% CI 1.102-5.097; P = 0.027). CONCLUSION The frequency of perioperative hypertension was higher in preoperative normotensive and known hypertensive patients who were identified as nondippers. In addition, diabetes mellitus and number of drugs were found to be predictors of perioperative hypertension.
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Affiliation(s)
- Güney Erdoğan
- Department of Cardiology, Samsun Training and Research Hospital, Samsun University Faculty of Medicine, Samsun
| | - Uğur Arslan
- Department of Cardiology, Samsun Training and Research Hospital, Samsun University Faculty of Medicine, Samsun
| | - Mustafa Yenerçağ
- Department of Cardiology, Training and Research Hospital, Ordu University, Ordu
| | - Osman Şahin
- Department of Cardiology, Konya Seydisehir State Hospital, Konya
| | - Hande Arslan
- Department of Otorhinolaryngology, Ankara Dişkapi Training and Research Hospital, University of Health Sciences, Ankara
| | - Mustafa Baran Yavuz
- Department of Anesthesiology and Reanimation, Bağcilar Training and Research Hospital, University of Health Sciences, Istanbul
| | - Ali Karagöz
- Department of Cardiology, Kartal Kosuyolu Research and Training Hospital, University of Health Sciences, İstanbul
| | - İrfan Şahin
- Department of Cardiology, Bağcilar Training and Research Hospital, University of Health Sciences, Istanbul, Turkey
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8
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Shirahama R, Tanigawa T, Ida Y, Fukuhisa K, Tanaka R, Tomooka K, Lan FY, Ikeda A, Wada H, Kales SN. Long-term effect of continuous positive airway pressure therapy on blood pressure in patients with obstructive sleep apnea. Sci Rep 2021; 11:19101. [PMID: 34580352 PMCID: PMC8476592 DOI: 10.1038/s41598-021-98553-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 09/08/2021] [Indexed: 11/13/2022] Open
Abstract
Obstructive sleep apnea (OSA) is a common cause of hypertension. Previous studies have demonstrated beneficial short-term effects of continuous positive airway pressure (CPAP) therapy on blood pressure. However, long-term antihypertensive effects of CPAP have not been properly verified. This study examined the longitudinal effect of CPAP therapy adherence on blood pressure among OSA patients. All patients diagnosed with OSA and undergoing subsequent CPAP therapy at a Kanagawa-area sleep clinic were clinically followed for 24 months to examine CPAP adherence, as well as longitudinal changes in blood pressure and body weight because it may become a confound factor for changes in blood pressure. The hours of CPAP usage were collected over the course of 30 nights prior to each follow-up visit (1st, 3rd, 6th, 12th, and 24th month). The relationship between CPAP adherence and blood pressure was analyzed using mixed-effect logistic regression models. A total of 918 OSA patients were enrolled in the study. We found a significant reduction in diastolic blood pressure among patients with good CPAP adherence during the 24-month follow-up period (β = − 0.13, p = 0.03), when compared to the group with poor CPAP adherence. No significant association was found between CPAP adherence and weight loss (β = − 0.02, p = 0.59). Long-term, good CPAP therapy adherence was associated with lower diastolic blood pressure without significant weight loss.
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Affiliation(s)
- Ryutaro Shirahama
- Department of Public Health, Graduate School of Medicine, Juntendo University, 2-1-1, Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan.,Faculty of Science and Technology, Keio University, Kanagawa, Japan
| | - Takeshi Tanigawa
- Department of Public Health, Graduate School of Medicine, Juntendo University, 2-1-1, Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan.
| | - Yoshifumi Ida
- Department of Public Health, Graduate School of Medicine, Juntendo University, 2-1-1, Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Kento Fukuhisa
- Department of Public Health, Graduate School of Medicine, Juntendo University, 2-1-1, Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Rika Tanaka
- Department of Public Health, Graduate School of Medicine, Juntendo University, 2-1-1, Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Kiyohide Tomooka
- Department of Public Health, Graduate School of Medicine, Juntendo University, 2-1-1, Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Fan-Yun Lan
- Environmental and Occupational Medicine and Epidemiology, Environmental Health, Harvard TH Chan School of Public Health, Boston, MA, USA
| | - Ai Ikeda
- Department of Public Health, Graduate School of Medicine, Juntendo University, 2-1-1, Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Hiroo Wada
- Department of Public Health, Graduate School of Medicine, Juntendo University, 2-1-1, Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Stefanos N Kales
- Environmental and Occupational Medicine and Epidemiology, Environmental Health, Harvard TH Chan School of Public Health, Boston, MA, USA.,Occupational Medicine, Cambridge Health Alliance/Harvard Medical School, Cambridge, MA, USA
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9
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Huart J, Cirillo A, Taminiau B, Descy J, Saint-Remy A, Daube G, Krzesinski JM, Melin P, de Tullio P, Jouret F. Human Stool Metabolome Differs upon 24 h Blood Pressure Levels and Blood Pressure Dipping Status: A Prospective Longitudinal Study. Metabolites 2021; 11:metabo11050282. [PMID: 33946722 PMCID: PMC8146767 DOI: 10.3390/metabo11050282] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 04/20/2021] [Accepted: 04/26/2021] [Indexed: 02/07/2023] Open
Abstract
Dysbiosis of gut microbiota (GM) has been involved in the pathophysiology of arterial hypertension (HT), via a putative role of short chain fatty acids (SCFAs). Its role in the circadian regulation of blood pressure (BP), also called “the dipping profile”, has been poorly investigated. Sixteen male volunteers and 10 female partners were subjected to 24 h ambulatory BP monitoring and were categorized in normotensive (NT) versus HT, as well as in dippers versus non-dippers. Nuclear magnetic resonance (NMR)-based metabolomics was performed on stool samples. A 5-year comparative follow-up of BP profiles and stool metabolomes was done in men. Significant correlations between stool metabolome and 24 h mean BP levels were found in both male and female cohorts and in the entire cohort (R2 = 0.72, R2 = 0.79, and R2 = 0.45, respectively). Multivariate analysis discriminated dippers versus non-dippers in both male and female cohorts and in the entire cohort (Q2 = 0.87, Q2 = 0.98, and Q2 = 0.68, respectively). Fecal amounts of acetate, propionate, and butyrate were higher in HT versus NT patients (p = 0.027; p = 0.015 and p = 0.015, respectively), as well as in non-dippers versus dippers (p = 0.027, p = 0.038, and p = 0.036, respectively) in the entire cohort. SCFA levels were significantly different in patients changing of dipping status over the 5-year follow-up. In conclusion, stool metabolome changes upon global and circadian BP profiles in both genders.
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Affiliation(s)
- Justine Huart
- Division of Nephrology, University of Liège Hospital (ULg CHU), University of Liège, B-4000 Liège, Belgium; (A.S.-R.); (J.-M.K.); (F.J.)
- Groupe Interdisciplinaire de Génoprotéomique Appliquée (GIGA), Cardiovascular Sciences, University of Liège, B-4000 Liège, Belgium
- Correspondence:
| | - Arianna Cirillo
- Center for Interdisciplinary Research on Medicines (CIRM), Metabolomics Group, University of Liège, B-4000 Liège, Belgium; (A.C.); (P.d.T.)
| | - Bernard Taminiau
- Fundamental and Applied Research Center for Animal & Health (FARAH), Veterinary Public Health, University of Liège, B-4000 Liège, Belgium; (B.T.); (G.D.)
- Laboratory for Food Microbiology, Department of Food Sciences, Faculty of Veterinary Medicine, University of Liège, B-4000 Liège, Belgium
| | - Julie Descy
- Clinical Microbiology, University of Liège Hospital (ULg CHU), University of Liège, B-4000 Liège, Belgium; (J.D.); (P.M.)
| | - Annie Saint-Remy
- Division of Nephrology, University of Liège Hospital (ULg CHU), University of Liège, B-4000 Liège, Belgium; (A.S.-R.); (J.-M.K.); (F.J.)
| | - Georges Daube
- Fundamental and Applied Research Center for Animal & Health (FARAH), Veterinary Public Health, University of Liège, B-4000 Liège, Belgium; (B.T.); (G.D.)
- Laboratory for Food Microbiology, Department of Food Sciences, Faculty of Veterinary Medicine, University of Liège, B-4000 Liège, Belgium
| | - Jean-Marie Krzesinski
- Division of Nephrology, University of Liège Hospital (ULg CHU), University of Liège, B-4000 Liège, Belgium; (A.S.-R.); (J.-M.K.); (F.J.)
- Groupe Interdisciplinaire de Génoprotéomique Appliquée (GIGA), Cardiovascular Sciences, University of Liège, B-4000 Liège, Belgium
| | - Pierrette Melin
- Clinical Microbiology, University of Liège Hospital (ULg CHU), University of Liège, B-4000 Liège, Belgium; (J.D.); (P.M.)
| | - Pascal de Tullio
- Center for Interdisciplinary Research on Medicines (CIRM), Metabolomics Group, University of Liège, B-4000 Liège, Belgium; (A.C.); (P.d.T.)
| | - François Jouret
- Division of Nephrology, University of Liège Hospital (ULg CHU), University of Liège, B-4000 Liège, Belgium; (A.S.-R.); (J.-M.K.); (F.J.)
- Groupe Interdisciplinaire de Génoprotéomique Appliquée (GIGA), Cardiovascular Sciences, University of Liège, B-4000 Liège, Belgium
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Casagrande M, Favieri F, Langher V, Guarino A, Di Pace E, Germanò G, Forte G. The Night Side of Blood Pressure: Nocturnal Blood Pressure Dipping and Emotional (dys)Regulation. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17238892. [PMID: 33265925 PMCID: PMC7729863 DOI: 10.3390/ijerph17238892] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 11/22/2020] [Accepted: 11/27/2020] [Indexed: 12/15/2022]
Abstract
Introduction: The dipping phenomenon is a physiological drop in blood pressure (around 10-20%) during sleep and represents an event related to the circadian blood pressure trend. This phenomenon, in some cases, is characterized by some alterations that can be expressed by an increase (extreme dipping), a decrease (non-dipping), or a reverse (i.e., higher blood pressure during sleep compared to awake state; reverse-dipping) physiological decline of blood pressure. Few studies focused on the association between the circadian variation of blood pressure and psychological variables, although this information could help understanding how psychological characteristics (e.g., emotional regulation or dysregulation) interact with individuals' physiological processes. Given the association between emotional dysregulation and essential hypertension, this study aimed to investigate the relationship between alexithymia and dipping status in a sample of healthy and hypertensive adults in the absence of other medical conditions. Methods: Two hundred and ten adults took part in the study and were classified, according to ambulatorial blood pressure measure (ABPM), into three groups: dippers (n = 70), non-dippers (n = 70), and extreme dippers (n = 70). The participants completed a socio-demographic and anamnestic interview and the Toronto Alexithymia Scale-20 (TAS-20). Results: The ANOVAs on the TAS-20 subscales showed that the groups differed in the difficulty identifying feelings and difficulty describing feelings. In both the subscales, dippers showed lower scores than non-dippers and extreme dippers. The ANOVA on the global score of TAS-20 confirmed that dippers were less alexithymic than both extreme dippers and non-dippers. Conclusions: This study confirms that some psychological factors, like alexithymia, could represent a characteristic of patients who fail to exhibit an adaptive dipping phenomenon. Moreover, an association between an excessive reduction of BP (extreme dipping) or a lack of the decrease of BP during sleep (non-dipping) and a worse emotional regulation, considering alexithymia construct, was highlighted for the first time, confirming the relevant role of the emotional process in the modulation of an essential psychophysiological process such as the circadian variation of BP.
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Affiliation(s)
- Maria Casagrande
- Dipartimento di Psicologia Dinamica e Clinica, Università di Roma “Sapienza”, 00185 Roma, Italy;
- Correspondence:
| | - Francesca Favieri
- Dipartimento di Psicologia, Università di Roma “Sapienza”, 00185 Roma, Italy; (F.F.); (A.G.); (E.D.P.); (G.F.)
| | - Viviana Langher
- Dipartimento di Psicologia Dinamica e Clinica, Università di Roma “Sapienza”, 00185 Roma, Italy;
| | - Angela Guarino
- Dipartimento di Psicologia, Università di Roma “Sapienza”, 00185 Roma, Italy; (F.F.); (A.G.); (E.D.P.); (G.F.)
| | - Enrico Di Pace
- Dipartimento di Psicologia, Università di Roma “Sapienza”, 00185 Roma, Italy; (F.F.); (A.G.); (E.D.P.); (G.F.)
| | - Giuseppe Germanò
- Dipartimento di Scienze Cardiovascolari, Respiratorie, Nefrologiche e Geriatriche, Università di Roma “Sapienza”, 00815 Roma, Italy;
| | - Giuseppe Forte
- Dipartimento di Psicologia, Università di Roma “Sapienza”, 00185 Roma, Italy; (F.F.); (A.G.); (E.D.P.); (G.F.)
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Casagrande M, Favieri F, Guarino A, Di Pace E, Langher V, Germanò G, Forte G. The Night Effect of Anger: Relationship with Nocturnal Blood Pressure Dipping. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:E2705. [PMID: 32326399 PMCID: PMC7216280 DOI: 10.3390/ijerph17082705] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 03/29/2020] [Accepted: 04/13/2020] [Indexed: 12/18/2022]
Abstract
INTRODUCTION The circadian pattern of blood pressure is characterized by a physiological drop occurring after sleep onset. The alteration of this phenomenon (non-dipping, extreme dipping, or reverse dipping) is associated with an increased cardiovascular risk. Besides altered autonomic and endocrine circadian rhythms, psychological aspects seem to play a role in this modification. However, the few studies that have analyzed the influence of psychological dimensions on the dipping phenomenon have reported inconsistent results. This study aimed to examine the relationship between anger expression and blood pressure (BP) dipping. METHODS We obtained 24 h ambulatory BP measurements from 151 participants and used them to define three groups according to their dipping status: Dippers (N = 65), Non-Dippers (N = 42), and Extreme Dippers (N = 44). Sociodemographic and anamnestic information was collected, and the State-Trait Anger Expression Inventory was used to assess anger. RESULTS Analysis of variance evidenced significant higher scores for Trait Anger Temperament and Anger Expression in Extreme Dippers than in both Dippers and Non-Dippers. However, after controlling for confounding variables, there was no significant relationship with trait anger, and only the result concerning the suppression of anger was confirmed. CONCLUSIONS These findings suggest that the analysis of some psychological factors, such as anger, could be necessary to better understand differences in nocturnal BP alterations. Trait anger and suppression of anger may contribute to the description and classification of patients who exhibit a maladaptive dipping phenomenon. However, modifiable (i.e., cigarette consumption) and unmodifiable (i.e., age) risk factors appear to mediate this relationship. Although further studies are necessary to explore this association, these results highlight that some aspects of anger can represent risk factors or markers of maladaptive modulation of the dipping phenomenon.
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Affiliation(s)
- Maria Casagrande
- Dipartimento di Psicologia Dinamica e Clinica–Università di Roma “Sapienza”, Via degli Apuli 1, 00185 Roma, Italy;
| | - Francesca Favieri
- Dipartimento di Psicologia—Università di Roma “Sapienza”, Via dei Marsi 78, 00185 Roma, Italy; (F.F.); (A.G.); (E.D.P.)
| | - Angela Guarino
- Dipartimento di Psicologia—Università di Roma “Sapienza”, Via dei Marsi 78, 00185 Roma, Italy; (F.F.); (A.G.); (E.D.P.)
| | - Enrico Di Pace
- Dipartimento di Psicologia—Università di Roma “Sapienza”, Via dei Marsi 78, 00185 Roma, Italy; (F.F.); (A.G.); (E.D.P.)
| | - Viviana Langher
- Dipartimento di Psicologia Dinamica e Clinica–Università di Roma “Sapienza”, Via degli Apuli 1, 00185 Roma, Italy;
| | - Giuseppe Germanò
- Dipartimento di Scienze Cardiovascolari, Respiratorie, Nefrologiche e Geriatriche–Università di Roma “Sapienza”, Piazzale Aldo Moro, 00185 Roma, Italy;
| | - Giuseppe Forte
- Dipartimento di Psicologia—Università di Roma “Sapienza”, Via dei Marsi 78, 00185 Roma, Italy; (F.F.); (A.G.); (E.D.P.)
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Zupo R, Castellana F, Boninfante B, Lampignano L, Lattanzio A, Sardone R, Giannelli G, De Pergola G. Uric Acid and Potassium Serum Levels Are Independent Predictors of Blood Pressure Non-Dipping in Overweight or Obese Subjects. Nutrients 2019; 11:nu11122970. [PMID: 31817392 PMCID: PMC6950029 DOI: 10.3390/nu11122970] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 12/02/2019] [Accepted: 12/03/2019] [Indexed: 01/07/2023] Open
Abstract
Background: Obesity and sleeping blood pressure (BP) abnormalities are well recognized as some of the main risk factors for hypertension and cardiovascular diseases (CVDs). The primary objective of this study was to evaluate the prevalence of hypertension and non-dipping profile in overweight/obese subjects. Methods: A sample of 100 consecutive healthy overweight/obese subjects, aged 20–69 years and never treated with antihypertensive drugs was examined. Ambulatory 24 h BP monitoring was performed to diagnose hypertension and a non-dipping profile. Anthropometric, metabolic and routine hematochemical parameters were assessed. All subjects underwent ultrasound measurement of common carotid intima–media thickness. Results: Hypertension was demonstrated in 69% (n = 69) and 27% of the sample (n = 27) had a non-dipping profile. Among the hematochemical variables, estimated glomerular filtration rate (eGFR) (p = 0.02) and FT4 (p = 0.01) serum levels were higher in the hypertensive group than in the normotensive group. Lower potassium and uric acid serum levels (p = 0.05) were independent predictive factors of a non-dipping BP profile. Conclusions: This study shows, for the first time, that 1) an unexpectedly high percentage (69%) of overweight/obese subjects is affected by hypertension; 2) early hypertensive subjects have an increased eGFR and higher FT4 serum levels; 3) lower potassium and uric acid levels are independent predictors of pathological nocturnal non-dipping.
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Affiliation(s)
- Roberta Zupo
- Research Unit on Frailty Phenotypes, National Institute of Gastroenterology “Saverio de Bellis”, Research Hospital, Castellana Grotte, 70013 Bari, Italy; (R.Z.); (F.C.); (L.L.); (R.S.)
| | - Fabio Castellana
- Research Unit on Frailty Phenotypes, National Institute of Gastroenterology “Saverio de Bellis”, Research Hospital, Castellana Grotte, 70013 Bari, Italy; (R.Z.); (F.C.); (L.L.); (R.S.)
| | | | - Luisa Lampignano
- Research Unit on Frailty Phenotypes, National Institute of Gastroenterology “Saverio de Bellis”, Research Hospital, Castellana Grotte, 70013 Bari, Italy; (R.Z.); (F.C.); (L.L.); (R.S.)
| | - Antonio Lattanzio
- Clinical Nutrition Unit, Medical Oncology, Department of Biomedical Science and Human Oncology, University of Bari, School of Medicine, Policlinico, 70124 Bari, Italy;
| | - Rodolfo Sardone
- Research Unit on Frailty Phenotypes, National Institute of Gastroenterology “Saverio de Bellis”, Research Hospital, Castellana Grotte, 70013 Bari, Italy; (R.Z.); (F.C.); (L.L.); (R.S.)
| | - Gianluigi Giannelli
- Scientific Direction, National Institute of Gastroenterology “Saverio de Bellis”, Research Hospital, Castellana Grotte, 70013 Bari, Italy;
| | - Giovanni De Pergola
- Clinical Nutrition Unit, Medical Oncology, Department of Biomedical Science and Human Oncology, University of Bari, School of Medicine, Policlinico, 70124 Bari, Italy;
- Correspondence: ; Tel.: +39-080-5592909; Fax: +39-080-5478831
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Mice overexpressing chromogranin A display hypergranulogenic adrenal glands with attenuated ATP levels contributing to the hypertensive phenotype. J Hypertens 2019; 36:1115-1128. [PMID: 29389743 DOI: 10.1097/hjh.0000000000001678] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE Elevated circulating chromogranin A (CHGA) is observed in human hypertension. CHGA is critical for granulogenesis and exocytosis of catecholamine stores from secretory large dense core vesicles (LDCV). This study aims to understand the morphological, molecular and phenotypic changes because of excess CHGA and the mechanistic link eventuating in hyper-adrenergic hypertension. METHODS Blood pressure and heart rate was monitored in mouse models expressing normal and elevated level of CHGA by telemetry. Catecholamine and oxidative stress radicals were measured. Adrenal ultrastructure, LDCV content and mitochondrial abundance were compared and respiration analyzed by Seahorse assay. Effect of CHGA dosage on adrenal ATP content, electron transport chain components and uncoupling protein 2 (UCP-2) were compared in vivo and in vitro. RESULTS Mice with excess-CHGA displayed hypertensive phenotype, higher heart rate and increased sympathetic tone. They had elevated plasma catecholamine and adrenal ROS levels. Excess-CHGA caused an increase in size and abundance of LDCV and adrenal mitochondria. Nonetheless, they had attenuated levels of ATP. Isolated adrenal mitochondria from mice with elevated CHGA showed higher maximal respiration rates in the presence of protonophore, which uncouples oxidative phosphorylation. Elevated CHGA resulted in overexpression of UCP2 and diminished ATP. In vitro in chromaffin cells overexpressing CHGA, concomitant increase in UCP2 protein and decreased ATP was detected. CONCLUSION Elevated CHGA expression resulted in underlying bioenergetic dysfunction in ATP production despite higher mitochondrial mass. The outcome was unregulated negative feedback of LDCV exocytosis and secretion, resulting in elevated levels of circulating catecholamine and consequently the hypertensive phenotype.
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Lovshin JA, Škrtić M, Bjornstad P, Moineddin R, Daneman D, Dunger D, Reich HN, Mahmud F, Scholey J, Cherney DZI, Sochett E. Hyperfiltration, urinary albumin excretion, and ambulatory blood pressure in adolescents with Type 1 diabetes mellitus. Am J Physiol Renal Physiol 2018; 314:F667-F674. [PMID: 29357443 PMCID: PMC5966760 DOI: 10.1152/ajprenal.00400.2017] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 11/10/2017] [Accepted: 12/07/2017] [Indexed: 12/15/2022] Open
Abstract
Adolescents with Type 1 diabetes mellitus (T1DM) are at risk for hyperfiltration and elevated urinary albumin-to-creatinine ratio (ACR), which are early indicators of diabetic nephropathy. Adolescents with T1DM also develop early changes in blood pressure, cardiovascular structure, and function. Our aims were to define the relationships between hyperfiltration, ACR, and 24-h ambulatory blood pressure over time in adolescents with T1DM. Normotensive, normoalbuminuric adolescents ( n = 98) with T1DM underwent baseline and 2-yr 24-h ambulatory blood pressure monitoring, glomerular filtration rate (eGFR) estimated by cystatin C (Larsson equation), and ACR measurements. Linear regression models adjusted for diabetes duration, sex, and HbA1c were used to determine associations. Hyperfiltration (eGFR ≥ 133 ml/min) was present in 31% at baseline and 21% at 2-yr follow-up. Hyperfiltration was associated with greater odds of rapid GFR decline (>3 ml·min-1·yr-1) [OR: 5.33, 95%; CI: 1.87-15.17; P = 0.002] over 2 yr. Natural log of ACR at baseline was associated with greater odds of hyperfiltration (OR: 1.71, 95% CI: 1.00-2.92; P = 0.049) and 2-yr follow-up (OR: 2.14, 95%; CI: 1.09-4.19; P = 0.03). One SD increase in eGFR, but not ln ACR, at 2-yr follow-up conferred greater odds of nighttime nondipping pattern (OR: 1.96, 95% CI: 1.06-3.63; P = 0.03). Hyperfiltration was prevalent at baseline and at 2-yr follow-up, predicted rapid decline in GFR, and was related to ACR. Elevated GFR at 2-yr follow-up was associated with nighttime nondipping pattern. More work is needed to better understand early relationships between renal hemodynamic and systemic hemodynamic changes in adolescents with T1DM to reduce future cardiorenal complications.
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Affiliation(s)
- Julie A Lovshin
- Division of Endocrinology and Metabolism, Department of Medicine, Sunnybrook Health Sciences Centre, University of Toronoto , Toronto, Ontario , Canada
| | - Marko Škrtić
- Division of Nephrology, Department of Medicine, University Health Network, University of Toronto , Toronto, Ontario , Canada
| | - Petter Bjornstad
- Division of Nephrology, Department of Medicine, University Health Network, University of Toronto , Toronto, Ontario , Canada
- Division of Endocrinology, Department of Pediatrics, University of Colorado School of Medicine , Aurora, Colorado
| | - Rahim Moineddin
- Department of Family and Community Medicine, University of Toronto , Toronto, Ontario , Canada
| | - Denis Daneman
- Division of Endocrinology and Metabolism, Department of Pediatrics, Hospital for Sick Children, University of Toronto , Toronto, Ontario , Canada
| | - David Dunger
- Department of Pediatrics, University of Cambridge , Cambridge , United Kingdom
| | - Heather N Reich
- Division of Nephrology, Department of Medicine, University Health Network, University of Toronto , Toronto, Ontario , Canada
| | - Farid Mahmud
- Division of Endocrinology and Metabolism, Department of Pediatrics, Hospital for Sick Children, University of Toronto , Toronto, Ontario , Canada
| | - James Scholey
- Division of Nephrology, Department of Medicine, University Health Network, University of Toronto , Toronto, Ontario , Canada
| | - David Z I Cherney
- Division of Nephrology, Department of Medicine, University Health Network, University of Toronto , Toronto, Ontario , Canada
| | - Etienne Sochett
- Division of Endocrinology and Metabolism, Department of Pediatrics, Hospital for Sick Children, University of Toronto , Toronto, Ontario , Canada
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Zullig LL, Diamantidis CJ, Bosworth HB, Bhapkar MV, Barnhart H, Oakes MM, Pendergast JF, Miller JJ, Patel UD. Racial differences in nocturnal dipping status in diabetic kidney disease: Results from the STOP-DKD (Simultaneous Risk Factor Control Using Telehealth to Slow Progression of Diabetic Kidney Disease) study. J Clin Hypertens (Greenwich) 2017; 19:1327-1335. [PMID: 28834119 PMCID: PMC5722697 DOI: 10.1111/jch.13088] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Revised: 05/30/2017] [Accepted: 06/04/2017] [Indexed: 11/29/2022]
Abstract
While racial variation in ambulatory blood pressure (BP) is known, patterns of diurnal dipping in the context of diabetic kidney disease have not been well defined. The authors sought to determine the association of race with nocturnal dipping status among participants with diabetic kidney disease enrolled in the STOP-DKD (Simultaneous Risk Factor Control Using Telehealth to Slow Progression of Diabetic Kidney Disease) trial. The primary outcome was nocturnal dipping-percent decrease in average systolic BP from wake to sleep-with categories defined as reverse dippers (decrease <0%), nondippers (0%-<10%), and dippers (≥10%). Twenty-four-hour ambulatory BP monitoring was completed by 108 participants (54% were nondippers, 24% were dippers, and 22% were reverse dippers). In adjusted models, the common odds of reverse dippers vs nondippers/dippers and reverse dippers/nondippers vs dippers was 2.6 (95% confidence interval, 1.2-5.8) times higher in blacks than in whites. Without ambulatory BP monitoring data, interventions that target BP in black patients may be unable to improve outcomes in this high-risk group.
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Affiliation(s)
- Leah L. Zullig
- Center of Excellence for Health Services Research in Primary CareDurham Veterans Affairs Health Care CenterDurhamNCUSA
- Division of General Internal MedicineDuke UniversityDurhamNCUSA
| | | | - Hayden B. Bosworth
- Center of Excellence for Health Services Research in Primary CareDurham Veterans Affairs Health Care CenterDurhamNCUSA
- Division of General Internal MedicineDuke UniversityDurhamNCUSA
- Department of Psychiatry and School of NursingDuke UniversityDurhamNCUSA
| | | | - Huiman Barnhart
- Department of Biostatistics and BioinformaticsDuke UniversityDurhamNCUSA
| | - Megan M. Oakes
- Division of General Internal MedicineDuke UniversityDurhamNCUSA
| | - Jane F. Pendergast
- Department of Biostatistics and BioinformaticsDuke UniversityDurhamNCUSA
| | - Julie J. Miller
- Division of General Internal MedicineDuke UniversityDurhamNCUSA
| | - Uptal D. Patel
- Division of NephrologyDuke UniversityDurhamNCUSA
- Gilead SciencesSan FranciscoCAUSA
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Endothelin contributes to the blood pressure rise triggered by hypoxia in severe obstructive sleep apnea. J Hypertens 2017; 35:118-124. [PMID: 27906839 DOI: 10.1097/hjh.0000000000001134] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
BACKGROUND Obstructive sleep apnea (OSA) is strongly correlated with an increased risk of systemic hypertension. However, the link between systemic hypertension and nocturnal apneas remains incompletely understood. Animal studies suggest an implication of the endothelin system. The aim of the present study is to determine if endogenous endothelin plays a role in the increase in blood pressure observed during hypoxic episodes in OSA patients, in addition to peripheral chemoreflex and neural sympathetic activation. METHODS We assessed the effects of the nonspecific endothelin antagonist bosentan (500 mg; Tracleer; Actelion; Basel, Switzerland) on ventilation, hemodynamics, and muscle sympathetic nerve activity (MSNA) during normoxia and isocapnic hypoxia using a randomized, crossover, double-blinded, placebo-controlled study design, and in 13 severely untreated sleep apneic patients (age 50 ± 9 years, apnea-hypopnea index 35 ± 21/h). RESULTS Hypoxia increased blood pressure, MSNA, and minute ventilation as oxygen saturation decreased. Bosentan suppressed completely the increase in SBP during a 5-min hypoxic challenge (143 ± 5 mmHg during hypoxia vs. 133 ± 5 mmHg during normoxia with placebo and 127 ± 3 mmHg during hypoxia vs. 125 ± 3 mmHg during normoxia under bosentan, P = 0.023). DBP as well as the rise in MSNA and ventilation during isocapnic hypoxia did not differ between bosentan and placebo. CONCLUSION Endothelin contributes to the rise in SBP in response to acute hypoxia in patients with severely untreated OSA. This was not due to lower chemoreflex activation with bosentan.
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Mvunzi TS, Lubenga Y, Lepira FB, Makulo JR, Nkodila A, Kuntonda DK, Samafundu Y, Nlandu YM, Engole YM, Kianu BP, Kintoki F, Mupepe D, Buila N, Kongo RM, Kintoki EV. Prevalence of Circadian Blood Pressure Patterns and Factors Associated with Non-Dipping among Black Patients with Untreated and Treated Hypertension: A Cross-Sectional Study. ACTA ACUST UNITED AC 2017. [DOI: 10.4236/wjcd.2017.711038] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Abstract
OBJECTIVE A nighttime dip in blood pressure is associated with decreased risk of cardiovascular morbidity and mortality. We examined whether personality traits predict nighttime dipping blood pressure. METHODS A community-based sample of 2848 adults from Sardinia (Italy) completed the Revised NEO Personality Inventory and 7 years later were examined with 24-hour ambulatory blood pressure monitoring. The primary analyses examined the associations of personality traits with continuous and categorical measures of mean arterial, systolic, and diastolic blood pressure nighttime dipping. RESULTS Agreeableness and conscientiousness were associated with more nocturnal blood pressure dipping (β = .05 [p = .025] and β = .07 [p < .001], respectively) and lower systolic blood pressure at night (β = -.05 [p = .018] and β = -.03 [p = .072], respectively). Nondippers were particularly more impulsive (p = .009), less trusting (p = .004), and less self-disciplined (p = .001), but there was no significant association between nocturnal dipping blood pressure and trait anxiety (p = .78) or depression (p = .59). The associations were stronger when comparing extreme dippers (nighttime drop ≥ 20%) to reverse dippers (nighttime increase in blood pressure). Indeed, scoring 1 standard deviation higher on conscientiousness was associated with approximately 40% reduced risk of reverse dipping (odds ratio = 1.43, confidence interval = 1.08-1.91). CONCLUSIONS We found evidence that reduced nighttime blood pressure dipping is associated with antagonism and impulsivity-related traits but not with measures of emotional vulnerability. The strongest associations were found with conscientiousness, a trait that may have a broad impact on cardiovascular health.
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Jindal A, Garcia-Touza M, Jindal N, Whaley-Connell A, Sowers JR. Diabetic kidney disease and the cardiorenal syndrome: old disease, new perspectives. Endocrinol Metab Clin North Am 2013; 42:789-808. [PMID: 24286950 PMCID: PMC4251585 DOI: 10.1016/j.ecl.2013.06.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
In this article, the literature is reviewed regarding the role of blood pressure variability and nocturnal nondipping of blood pressure as well as the presence of diabetic kidney disease (DKD), in the absence of albuminuria, as risk predictors for progressive DKD. The importance of glycemic and blood pressure control in patients with diabetes and chronic kidney disease, and the use of oral hypoglycemic agents and antihypertensive agents in this patient cohort, are also discussed.
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Affiliation(s)
- Ankur Jindal
- Hospital Medicine, Department of Internal Medicine, University of Missouri, Columbia, Missouri, USA
- Diabetes and Cardiovascular Research Center, University of Missouri, Columbia, Missouri, USA
| | - Mariana Garcia-Touza
- Diabetes and Cardiovascular Research Center, University of Missouri, Columbia, Missouri, USA
- Division of Endocrinology, Diabetes & Metabolism, Department of Internal Medicine University of Missouri Columbia School of Medicine, Columbia, Missouri, USA
| | - Nidhi Jindal
- Division of Nephrology and Hypertension, Department of Internal Medicine University of Missouri Columbia School of Medicine, Columbia, Missouri, USA
| | - Adam Whaley-Connell
- Diabetes and Cardiovascular Research Center, University of Missouri, Columbia, Missouri, USA
- Division of Endocrinology, Diabetes & Metabolism, Department of Internal Medicine University of Missouri Columbia School of Medicine, Columbia, Missouri, USA
- Division of Nephrology and Hypertension, Department of Internal Medicine University of Missouri Columbia School of Medicine, Columbia, Missouri, USA
- Harry S Truman Memorial Veterans Hospital, Columbia, Missouri, USA
| | - James R. Sowers
- Diabetes and Cardiovascular Research Center, University of Missouri, Columbia, Missouri, USA
- Division of Endocrinology, Diabetes & Metabolism, Department of Internal Medicine University of Missouri Columbia School of Medicine, Columbia, Missouri, USA
- Department of Medical Physiology and Pharmacology, University of Missouri, Columbia, Missouri, USA
- Harry S Truman Memorial Veterans Hospital, Columbia, Missouri, USA
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Nocturnal Blood Pressure, 3-Methoxy-4-hydroxyphenylglycol and Carotid Intima-media Thickness: The SABPA Study. Heart Lung Circ 2013; 22:917-23. [DOI: 10.1016/j.hlc.2012.12.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2012] [Revised: 07/31/2012] [Accepted: 12/16/2012] [Indexed: 11/30/2022]
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Geraldes V, Gonçalves-Rosa N, Liu B, Paton JFR, Rocha I. Chronic depression of hypothalamic paraventricular neuronal activity produces sustained hypotension in hypertensive rats. Exp Physiol 2013; 99:89-100. [PMID: 24142454 DOI: 10.1113/expphysiol.2013.074823] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Changes in the sympathetic nervous system are responsible for the initiation, development and maintenance of hypertension. An important central sympathoexcitatory region is the paraventricular nucleus (PVN) of the hypothalamus, which may become more active in hypertensive conditions, as shown in acute studies previously. Our objective was to depress PVN neuronal activity chronically by the overexpression of an inwardly rectifying potassium channel (hKir2.1), while evaluating the consequences on blood pressure (BP) and its reflex regulation. In spontaneously hypertensive rats (SHRs) and Wistar rats (WKY) lentiviral vectors (LVV-hKir2.1; LV-TREtight-Kir-cIRES-GFP5 4 × 10(9) IU and LV-Syn-Eff-G4BS-Syn-Tetoff 6.2 × 10(9) IU in a ratio 1:4) were stereotaxically microinjected bilaterally into the PVN. Sham-treated SHRs and WKY received bilateral PVN microinjections of LVV-eGFP (LV-Syn-Eff-G4BS-Syn-Tetoff 6.2 × 10(9) IU and LV-TREtight-GFP 5.7 × 10(9) IU in a ratio 1:4). Blood pressure was monitored continuously by radio-telemetry and evaluated over 75 days. Baroreflex gain was evaluated using phenylephrine (25 μg ml(-1), i.v.), whereas lobeline (25 μg ml(-1), i.v.) was used to stimulate peripheral chemoreceptors. In SHRs but not normotensive WKY rats, LVV-hKir2.1 expression in the PVN produced time-dependent and significant decreases in systolic (from 158 ± 3 to 132 ± 6 mmHg; P < 0.05) and diastolic BP (from 135 ± 4 to 113 ± 5 mmHg; P < 0.05). The systolic BP low-frequency band was reduced (from 0.79 ± 0.13 to 0.42 ± 0.09 mmHg(2); P < 0.05), suggesting reduced sympathetic vasomotor tone. Baroreflex gain was increased and peripheral chemoreflex depressed after PVN microinjection of LVV-hKir2.1. We conclude that the PVN plays a major role in long-term control of BP and sympathetic nervous system activity in SHRs. This is associated with reductions in both peripheral chemosensitivity and respiratory-induced sympathetic modulation and an improvement in baroreflex sensitivity. Our results support the PVN as a powerful site to control BP in neurogenic hypertension.
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Affiliation(s)
- Vera Geraldes
- I. Rocha: Instituto de Fisiologia, Faculdade de Medicina de Lisboa, Av Prof Egas Moniz, 1649-028 Lisbon, Portugal.
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Garcia CEV, Drager LF, Krieger EM, Negrão CE, Bortolotto LA, Lorenzi-Filho G, Ueno LM. Arousals are frequent and associated with exacerbated blood pressure response in patients with primary hypertension. Am J Hypertens 2013; 26:617-23. [PMID: 23547035 DOI: 10.1093/ajh/hps065] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Spontaneous arousals are relatively common during sleep, and induce hemodynamic responses. We sought to investigate the frequency and magnitude of blood pressure (BP) increases triggered by spontaneous arousals in patients with primary hypertension. METHODS We conducted a study in which we divided 18 nonobese, sedentary adults without sleep-disordered breathing into two groups, consisting of: (i) hypertensive (HT, n = 8) patients; and (ii) normotensive (NT, n = 10) controls. The groups were matched for age and body mass index. All subjects underwent full polysomnography with simultaneous monitoring of heart rate (HR) and beat-by-beat BP. Each subject's BP and HR were analyzed immediately before BP peaks triggered by spontaneous arousals during stage 2 of nonrapid eye movement sleep. RESULTS The total sleep time, sleep efficiency, and sleep structure in the two study groups were similar. In contrast, the number of arousals was significantly higher in the HT than in the NT group, at 25 ± 5 vs. 12 ± 3 events/h, respectively (P < 0.05). The HR of the HT and NT groups was similar before arousal (65 ± 3 bpm vs. 67 ± 3 bpm, respectively, P < 0.01) and increased significantly and similarly in the two groups upon arousal (to 79 ± 6 bpm vs. 74 ± 4 bpm, respectively, P < 0.01). Systolic and diastolic BPs were significantly higher throughout sleep in the HT than in the NT group. During spontaneous arousals, BP increased in both groups (P < 0.05). However, the magnitude of the increase in systolic BP was significantly greater in the HT than in the NT group (22 ± 3 mm Hg vs. 15 ± 3 mm Hg, P < 0.05). CONCLUSIONS Patients with hypertension who do not have sleep-disordered breathing have an increased cardiovascular burden during sleep, which may be due to the greater number of arousals and exacerbated systolic BP response that they experience during sleep. These novel findings may have cardiovascular implications in patients with hypertension.
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Chrysant SG, Germino FW, Neutel JM. Olmesartan medoxomil-based antihypertensive therapy evaluated by ambulatory blood pressure monitoring: efficacy in high-risk patient subgroups. Am J Cardiovasc Drugs 2012; 12:375-89. [PMID: 23116225 DOI: 10.1007/bf03262472] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Hypertension affects approximately 26% of the world's adult population and is a recognized major risk factor for morbidity and mortality associated with cardiovascular, cerebrovascular, and renal diseases. However, despite the availability of a range of effective antihypertensive agents and a growing awareness of the consequences of high blood pressure (BP), the treatment and control of hypertension remains suboptimal. A number of patient subgroups are categorized as 'high risk' and may have hypertension that is more difficult to treat, including obese individuals, patients with stage 2 hypertension, those with type 2 diabetes mellitus (T2DM), patients with coronary artery disease or a history of stroke, and Black patients. As the benefits of lowering BP in patients with hypertension are unequivocal, particularly in high-risk patients, treating high-risk patients with hypertension to BP goals and maintaining 24-hour BP control is important to help reduce cardiovascular risk and improve outcomes. Although the BP goals recommended in current consensus guidelines for the management of patients with hypertension are based on cuff BP measurements, ambulatory BP monitoring (ABPM) provides a valuable diagnostic tool and allows a more accurate assessment of BP levels throughout the 24-hour dosing period. ABPM is a better predictor of prognosis than office BP measurement and is also useful for assessing whether antihypertensive therapy remains effective in the critical last few hours of the dosing period, which usually coincides with the morning BP surge associated with arousal and arising. ABPM has been adopted by new evidence-based guidelines in the United Kingdom to confirm a suspected diagnosis of hypertension, which is an indication of the growing importance of ABPM in the management of hypertension. This review provides an overview of the efficacy and safety of antihypertensive therapy based on olmesartan medoxomil ± hydrochlorothiazide and amlodipine/olmesartan medoxomil in high-risk patient populations enrolled in studies that reported ambulatory BP endpoints. The studies identified in this review showed that a titrate-to-BP goal strategy using olmesartan medoxomil- or amlodipine/olmesartan medoxomil-based antihypertensive therapy was an effective and well-tolerated approach for maintaining BP control throughout the full 24-hour dosing period in high-risk patients with difficult-to-treat hypertension.
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Affiliation(s)
- Steven G Chrysant
- Oklahoma Cardiovascular and Hypertension Center and the University of Oklahoma School of Medicine, Oklahoma City, OK 73132, USA.
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Abstract
BACKGROUND Psoriasis vulgaris is one of the most prevalent chronic, inflammatory skin disorders. Patients with psoriasis carry an excess risk of hypertension and adverse cardiovascular (CV) events. Blood pressure (BP) has a circadian rhythm characterised with lower values at night. A blunted nocturnal BP decline defined as non-dipping accelerates the development of hypertension and CV diseases. The aim of this study is to evaluate circadian variation of blood pressure in normotensive middle-aged patients with psoriasis vulgaris. METHODS Seventy adult patients with psoriasis vulgaris (group 1) and 70 age and sex-matched healthy individuals (group 2) were included in the study. Ambulatory BP monitoring was performed in all participants over a 24-h period. Non-dippers are defined as those who show a reduction in BP of less than 10 % between the average day and night systolic BP. RESULTS Although mean 24-h BPs were similar in both groups, night-time BPs were significantly higher in psoriatic patients (115.1 ± 7.7 vs. 109.9 ± 6.0 mmHg and 72.1 ± 7.0 vs. 67.6 ± 5.5 mmHg, respectively; p < 0.05). The non-dipping pattern of BP changes was significantly more common in patients with psoriasis vulgaris compared with the control group (65.9 vs. 34.1 %, p < 0.01). Psoriasis severity and BMI are independent predictors of impaired nocturnal BP regulation. CONCLUSIONS Patients with psoriasis vulgaris had increased nocturnal BP and heart rate. This is the first study to demonstrate a blunted nocturnal BP decrease in normotensive patients with psoriasis.
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Korkmaz S, Yilmaz A, Yildiz G, Kiliçli F, Içağasioğlu S. Relationship between homocysteine and non-dipper pattern in patients with type 2 diabetes mellitus. ARQUIVOS BRASILEIROS DE ENDOCRINOLOGIA E METABOLOGIA 2012; 56:285-290. [PMID: 22911280 DOI: 10.1590/s0004-27302012000500002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2011] [Accepted: 12/07/2011] [Indexed: 06/01/2023]
Abstract
OBJECTIVE The rate of reduction of nocturnal blood pressure (NBP) is lesser than normal in patients with type 2 diabetes mellitus (type 2 DM). Hyperhomocysteinemia (HHC) disrupts vascular structure and function, no matter the underlying causes. The risk of development of vascular disease is greater in diabetic patients with hyperhomocysteinemia than in patients with normal homocystein levels. The aim of the study was to investigate whether there are differences of homocystein levels in dipper and non-dippers patients with type 2 DM. SUBJECTS AND METHODS We compared 50 patien-ts (33 females, 17 males) with type 2 DM and 35 healthy individuals (18 females, 17 males ) in a control group. Ambulatory blood pressure monitoring (ABPM) was performed and homocysteine levels were measured in all patients. RESULTS We found that the percentage of non-dipper pattern was 72% in patients with type 2 DM and 57% in control group. In diabetic and control individuals, homocystein levels were higher in non-dipper (respectively 13.4 ± 8.1 µmol/L and 11.8 ± 5 µmol/L) than in dipper subjects (respectively, 11.8 ± 5.8 µmol/L and 10.1 ± 4.2 µmol/L), but there was no significant difference between the two groups (respectively, p = 0.545, p = 0.294). CONCLUSION In both groups, homocystein levels were higher in non-dipper than in dipper participants, but there was no significant difference between the groups. High homocystein levels and the non-dipper pattern increases cardiovascular risk. Therefore, the relationship between nocturnal blood pressure changes and homocystein levels should be investigated in a larger study.
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Affiliation(s)
- Serdal Korkmaz
- Division of Hematology, Cumhuriyet University School of Medicine, Sivas, Turkey
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Sasaki N, Ozono R, Yamauchi R, Teramen K, Munemori M, Hamada H, Edahiro Y, Ishii K, Seto A, Kihara Y. Age-Related Differences in the Mechanism of Nondipping Among Patients with Obstructive Sleep Apnea Syndrome. Clin Exp Hypertens 2012; 34:270-7. [DOI: 10.3109/10641963.2012.681083] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Kanbay M, Turkmen K, Ecder T, Covic A. Ambulatory blood pressure monitoring: from old concepts to novel insights. Int Urol Nephrol 2011; 44:173-82. [DOI: 10.1007/s11255-011-0027-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2011] [Accepted: 06/22/2011] [Indexed: 11/29/2022]
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Coleman CT, Stowasser M, Jenkins C, Marwick TH, Sharman JE. Central Hemodynamics and Cardiovascular Risk in Nondippers. J Clin Hypertens (Greenwich) 2011; 13:557-62. [DOI: 10.1111/j.1751-7176.2011.00480.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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29
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Understanding the connection between spiritual well-being and physical health: an examination of ambulatory blood pressure, inflammation, blood lipids and fasting glucose. J Behav Med 2011; 34:477-88. [DOI: 10.1007/s10865-011-9343-7] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2010] [Accepted: 03/29/2011] [Indexed: 10/18/2022]
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Cardiovascular prognostic value of ambulatory blood pressure monitoring in a Portuguese hypertensive population followed up for 8.2 years. Blood Press Monit 2011; 15:240-6. [PMID: 20616705 DOI: 10.1097/mbp.0b013e32833c8b08] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
AIM We investigated the cardiovascular (CV) prognostic value of 24-h ambulatory blood pressure (ABP) and blood pressure (BP) during the six 4-h periods of the 24-h ABP length in a cohort of 1200 Portuguese hypertensive patients (aged 51±12 years) without earlier CV events. METHOD The presence of CV events were followed for 9.833 patient years and analyzed using a cox hazard model. RESULTS During the 15.2 (mean 8.2) years follow-up, there were 152 CV events (11% fatal) including 79 strokes and 52 coronary events. After adjustment for risk factors and office BP (OBP), a 1-standard deviation increment of 24-h, daytime and night-time systolic BP (SBP) significantly predicted any CV event with hazard ratios (HR) 1.41, 1.33 and 1.57, respectively, and stroke with HR 1.67, 1.58, 1.67, respectively (all P<0.01), but not coronary events. Prognostic significance of these SBP values and of night-time ABP persisted after adjustment for diastolic BP and daytime ABP, respectively, whereas the opposite did not occur. SBP night-time fall (%) inversely predicted total CV events after adjustment for diastolic BP night-time fall. Among all six 4-h periods of 24-h, increment of SBP during the first 4 h of night-time was the most powerful predictor of any CV event (HR 1.64) and stroke (HR 2.02) (both P<0.01) even after adjustment for daytime and 24-h BP. CONCLUSION In predicting CV events and stroke, ABP is superior to office BP, ABP systolic is superior to ABP diastolic, and night-time BP is superior to daytime BP particularly during the first 4 h of sleep.
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van der Meer IM, Ruggenenti P, Remuzzi G. The diabetic CKD patient--a major cardiovascular challenge. J Ren Care 2010; 36 Suppl 1:34-46. [PMID: 20586898 DOI: 10.1111/j.1755-6686.2010.00165.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The diabetic patient with chronic kidney disease (CKD) is at very high risk of cardiovascular disease (CVD). Primary and secondary CVD prevention is of major importance and should be targeted at both traditional cardiovascular risk factors and risk factors specific for patients with CKD, such as albuminuria, anaemia and CKD--mineral and bone disorder. However, treatment goals have largely been derived from clinical trials including patients with no or only mild CKD and may not be generalizable to patients with advanced renal disease. Moreover, in patients on renal replacement therapy, the association between traditional CVD risk factors and the incidence of CVD may be reversed, and pharmaceutical interventions that are beneficial in the general population may be ineffective or even harmful in this high-risk population. Those involved in the delivery of care to patients with diabetes and CKD need to be aware of these issues and should adopt an individualised approach to treatment.
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Affiliation(s)
- Irene M van der Meer
- Unit of Nephrology, Azienda Ospedaliera Ospedali Riuniti di Bergamo, Bergamo, Italy.
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Tsioufis C, Andrikou I, Thomopoulos C, Syrseloudis D, Stergiou G, Stefanadis C. Increased nighttime blood pressure or nondipping profile for prediction of cardiovascular outcomes. J Hum Hypertens 2010; 25:281-93. [DOI: 10.1038/jhh.2010.113] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Intranasal benzo[a]pyrene alters circadian blood pressure patterns and causes lung inflammation in rats. Arch Toxicol 2010; 85:337-46. [DOI: 10.1007/s00204-010-0589-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2010] [Accepted: 09/01/2010] [Indexed: 01/22/2023]
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Kereiakes DJ, Neutel J. Efficacy of an olmesartan medoxomil-based treatment algorithm in patients with hypertension and type 2 diabetes: analysis of diurnal blood pressure control as assessed by 24-hour ambulatory blood pressure monitoring. Ther Adv Cardiovasc Dis 2010; 4:285-93. [DOI: 10.1177/1753944710378675] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Objective: Secondary, prespecified analysis of a single-arm, open-label study evaluating the efficacy of olmesartan medoxomil (OM) plus hydrochlorothiazide (HCTZ) in patients with hypertension and type 2 diabetes. Methods: After placebo run-in, 192 patients received OM 20 mg/day for 3 weeks. If blood pressure (BP) remained ≥120/70 mmHg, patients were uptitrated every 3 weeks to OM 40 mg/day, OM/HCTZ 40/12.5 mg/day, and OM/HCTZ 40/25 mg/day. Efficacy was evaluated by 24-hour ambulatory BP monitoring. Secondary endpoints included changes in ambulatory systolic BP (SBP) and diastolic BP (DBP) during daytime (08:00 to 16:00) and nighttime (22:00 to 06:00), as well as achievement of prespecified ambulatory BP targets in the total cohort and subgroups based on gender, race, hypertension severity, and age (≥65 or <65 years). Dipper status (nocturnal decrease in BP ≥10% of mean daytime BP) was assessed. Results: At baseline, mean ambulatory BP was 151.2 ± 12.7/87.6 ± 9.0 mmHg during the daytime and 140.3 ± 13.1/78.1 ± 8.6 mmHg during the nighttime. Mean daytime and nighttime ambulatory BP was reduced from baseline by 22.3 ± 13.7/12.0 ± 8.9 mmHg and 18.8 ± 12.4/ 10.2 ± 7.2 mmHg, respectively. The reduction in daytime ambulatory SBP was 24.4 ± 11.8 mmHg in Blacks, 21.7 ± 14.2 mmHg in non-Blacks, 23.6 ± 12.3 mmHg in females, 21.2 ± 14.8 mmHg in males, 23.4 ± 11.6 mmHg in patients aged ≥65 years, and 21.9 ± 14.4 mmHg in those aged <65 years. Ambulatory BP targets of <130/80, <125/75, and <120/80 mmHg were reached by 51.7%, 36.0%, and 32.6% of patients during the daytime and 69.8%, 60.5%, and 50.6% of patients during the nighttime. After 12 weeks of treatment, 36.4% of baseline nondippers converted to dippers. Conclusions: OM ± HCTZ effectively lowered ambulatory BP in patients with type 2 diabetes and hypertension, enabling them to achieve ambulatory BP targets during both the daytime and nighttime.
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Affiliation(s)
- Dean J. Kereiakes
- The Carl and Edyth Lindner Center for Research and Education at The Christ Hospital, 2123 Auburn Avenue, Suite 424, Cincinnati, OH 45219, USA,
| | - Joel Neutel
- Orange County Research Center, Tustin, CA, USA
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Schwimmer H, Stauss HM, Abboud F, Nishino S, Mignot E, Zeitzer JM. Effects of sleep on the cardiovascular and thermoregulatory systems: a possible role for hypocretins. J Appl Physiol (1985) 2010; 109:1053-63. [PMID: 20705949 DOI: 10.1152/japplphysiol.00516.2010] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Sleep influences the cardiovascular, endocrine, and thermoregulatory systems. Each of these systems may be affected by the activity of hypocretin (orexin)-producing neurons, which are involved in the etiology of narcolepsy. We examined sleep in male rats, either hypocretin neuron-ablated orexin/ataxin-3 transgenic (narcoleptic) rats or their wild-type littermates. We simultaneously monitored electroencephalographic and electromyographic activity, core body temperature, tail temperature, blood pressure, electrocardiographic activity, and locomotion. We analyzed the daily patterns of these variables, parsing sleep and circadian components and changes between states of sleep. We also analyzed the baroreceptor reflex. Our results show that while core temperature and heart rate are affected by both sleep and time of day, blood pressure is mostly affected by sleep. As expected, we found that both blood pressure and heart rate were acutely affected by sleep state transitions in both genotypes. Interestingly, hypocretin neuron-ablated rats have significantly lower systolic and diastolic blood pressure during all sleep stages (non-rapid eye movement, rapid eye movement) and while awake (quiet, active). Thus, while hypocretins are critical for the normal temporal structure of sleep and wakefulness, they also appear to be important in regulating baseline blood pressure and possibly in modulating the effects of sleep on blood pressure.
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Affiliation(s)
- H Schwimmer
- Department of Psychiatry and Behavioral Sciences, Stanford University, Palo Alto, California, USA.
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Ali K, Leong KMW, Houlder S, Getov S, Lee R, Rajkumar C. The relationship between dipping profile in blood pressure and neurologic deficit in early acute ischemic stroke. J Stroke Cerebrovasc Dis 2010; 20:10-15. [PMID: 20538485 DOI: 10.1016/j.jstrokecerebrovasdis.2009.09.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2009] [Revised: 09/15/2009] [Accepted: 09/21/2009] [Indexed: 11/18/2022] Open
Abstract
Blood pressure (BP) in healthy individuals exhibits a diurnal variation, with a nighttime dip of 10%-20%. A persistently high nighttime BP is associated with increased cardiovascular morbidity. The effects of diurnal BP variations on the neurologic deficit in acute stroke at presentation and in the first few weeks poststroke are unclear. We hypothesized that persistently elevated BP results in poor outcome. Patients with an acute ischemic stroke presenting within 48 hours of onset underwent 24-hour ambulatory monitoring of systolic, diastolic, and mean BP. There were a total of 35 patients (16 males; mean age, 74 ± 14 years). The percentage change between mean day and night BP classified patients into dippers (> 10% change), nondippers (0-10% change), or reverse-dippers (< 0% change). The Scandinavian Stroke Scale (SSS) and the National Institute of Health Stroke Scale (NIHSS) were assessed on admission, at week 1, and at week 3. The relationship between neurologic score and dipping classification was analyzed using analysis of variance and analysis of covariance, with age and baseline score as covariates. Based on both the SSS and NIHSS, the reverse-dippers had the lowest neurologic scores at baseline, week 1, and week 3, followed by the nondippers. The dippers performed the best in comparison. No significant differences in demographics and/or other BP characteristics among the groups that could account for these differences in outcome were noted. A reverse-dipping profile in diastolic BP was associated with poor neurologic state at baseline and weeks 1 and 3 compared with both dippers and nondippers.
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Affiliation(s)
- Khalid Ali
- Academic Department of Geriatrics, Brighton and Sussex Medical School, Brighton, UK.
| | | | | | - Spas Getov
- Brighton & Sussex University Hospitals Trust, Brighton, UK
| | - Richard Lee
- Brighton & Sussex University Hospitals Trust, Brighton, UK
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Simple renal cysts and circadian blood pressure: are they related to each other in patients with hypertension? Int Urol Nephrol 2010; 43:157-65. [PMID: 20390353 DOI: 10.1007/s11255-010-9734-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2010] [Accepted: 03/28/2010] [Indexed: 10/19/2022]
Abstract
Previous studies have shown that the presence of simple renal cysts was related to hypertension. However, the relationship between simple renal cysts and circadian blood pressure was not studied before. Our study population comprised of newly diagnosed patients with essential hypertension. Medical history, physical examination and office blood pressure measurements, laboratory analysis, ambulatory blood pressure measurements, renal ultrasonography, and 24-h urine specimens were collected. In total, the study included 190 patients (male/female ratio 77/113; mean age 50.3 ± 11.3). Overall, 127 (66.8%) patients were dippers and 92 (48.4%) had at least one simple renal cyst. Thirty-five patients had solitary cysts and 57 patients had multiple cysts. Cysts were bilateral in 47 of patients. Most of ambulatory blood pressure recordings were higher in patients with at least one simple cyst when compared to patients without cysts. In multivariate logistic regression analysis, serum uric acid (P: 0.047, OR: 1.287, CI: 1.011-1.658), lower creatinine clearance (P: 0.001, OR: 1.030, CI: 1.012-1.049), presence of diabetes (P: 0.029, OR: 2.451, CI: 1.094-5.491), and presence of at least one cyst in each kidney (P: 0.002, OR: 3.087, CI: 1.533-6.212) were found to be independently related to nocturnal non-dipping. In conclusion, the presence of simple renal cysts is related to higher ambulatory BP and is associated with non-dipping phenomenon in patients with essential hypertension.
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Vukolic A, Antic V, Van Vliet BN, Yang Z, Albrecht U, Montani JP. Role of mutation of the circadian clock gene Per2 in cardiovascular circadian rhythms. Am J Physiol Regul Integr Comp Physiol 2010; 298:R627-34. [PMID: 20053965 DOI: 10.1152/ajpregu.00404.2009] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Alterations in the circadian blood pressure pattern are frequently observed in hypertension and lead to increased cardiovascular morbidity. However, there are no studies that have investigated a possible implication of the Period2 gene, a key component of the molecular circadian clock, on the circadian rhythms of blood pressure and heart rate. To address this question, we monitored blood pressure, heart rate, and locomotor activity 24 h a day by telemetry in mice carrying a mutation in the Period2 gene and in wild-type control mice. Under a standard 12:12-h light-dark cycle, mutant mice showed a mild cardiovascular phenotype with an elevated 24-h heart rate, a decreased 24-h diastolic blood pressure, and an attenuation of the dark-light difference in blood pressure and heart rate. Locomotor activity was similar in both groups and did not appear to explain the observed hemodynamic differences. When mice were placed under constant darkness during eight consecutive days, wild-type mice maintained 24-h rhythms, whereas there was an apparent progressive loss of 24-h rhythm of blood pressure, heart rate, and locomotor activity in mutant mice. However, a chi square periodogram revealed that circadian rhythms were preserved under complete absence of any light cue, but with shorter periods by approximately 40 min, leading to a cumulative phase shift toward earlier times of approximately 5 h and 20 min by the end of the 8th day. When heart rate, mean arterial pressure, and activity were recalculated according to the endogenous circadian periods of each individual mouse, the amplitudes of the circadian rhythms ("subjective night"-"subjective day" differences) were maintained for all variables studied. Our data show that mutation of the Period2 gene results in an attenuated dipping of blood pressure and heart rate during both light-dark cycles and constant darkness, and in shorter circadian periods during constant darkness.
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Affiliation(s)
- Ana Vukolic
- Dept. of Medicine/Division of Physiology, Univ. of Fribourg, Chemin du Musée 5, CH-1700 Fribourg/Switzerland
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Relationship between self-reported sleep duration and changes in circadian blood pressure. Am J Hypertens 2009; 22:1205-11. [PMID: 19745817 DOI: 10.1038/ajh.2009.165] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Abnormalities in sleep duration and circadian blood pressure (BP) rhythm are both independently associated with increased risk of death and cardiovascular disease. The relationship, however, between these two entities remains unclear. This study was undertaken to determine whether abnormal sleep duration is associated with nondipping status and elevated morning surge. METHODS In a cross-sectional study, we assessed the relationship between self-reported sleep duration and circadian BP profiles from 24-h ambulatory BP monitoring (ABPM) in 108 normotensive and 417 hypertensive subjects, independent of relevant sociodemographic, anthropometric, and medical factors. RESULTS On average, subjects reported sleeping 6.5 +/- 1.7 h with 18.5% sleeping < or =5 h and 7.6%, > or =9 h. There were 199 (37.9%) nondippers in our cohort and the mean morning surge was 18.7 +/- 1.7 mm Hg. The adjusted odds ratio for nondipping (<10% nocturnal systolic BP fall) associated with a 1-h decrement in sleep duration was 1.12 (P = 0.04) and with age per 5-year increment, 1.15 (P = 0.0003). The adjusted odds ratio for an elevated morning surge (> or =18.0 mm Hg) associated with a 1-h increment in sleep duration was 1.13 (P = 0.02). CONCLUSIONS Our study indicates that a sleep deficit is associated with nondipping and a decreased morning surge, whereas a sleep surfeit is associated with less nondipping and an increased morning surge. These findings provide a possible link for the heightened risk of cardiovascular disease associated with disturbances in circadian BP rhythm and the extremes of sleep quantity.
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Friedman O, Logan AG. Nocturnal blood pressure profiles among normotensive, controlled hypertensive and refractory hypertensive subjects. Can J Cardiol 2009; 25:e312-6. [PMID: 19746250 DOI: 10.1016/s0828-282x(09)70142-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Nocturnal blood pressure abnormalities are independently associated with an increased risk of death and cardiovascular disease. It is unclear, however, whether they are related to the presence or severity of hypertension. OBJECTIVES To determine and compare the prevalence of sleep pattern disturbances in normotensive (NT) and hypertensive patients. METHODS The present cross-sectional study assessed the nocturnal blood pressure profiles from 24 h ambulatory blood pressure monitoring of refractory hypertensive (RH) (n=26), controlled hypertensive (CH) (n=52) and NT (n=52) subjects who were matched for age, sex and body mass index. Results are expressed as mean +/- SD or proportion, as appropriate. RESULTS During sleep, the percentage fall in mean arterial pressure was 15.1+/-6.1% in the NT group, 11.5+/-7.0% in the CH group and 7.7+/-7.7% in the RH group (P<0.0001). The corresponding proportions of nondipping were 25.0%, 42.3% and 61.5%, respectively (P=0.006), and those of nocturnal hypertension were 9.6%, 23.1% and 84.6%, respectively (P<0.0001). All pairwise comparisons of nocturnal blood pressure fall were significant. The proportion of subjects in the RH group who experienced a rise in nocturnal blood pressure (19.2%) was significantly greater than the proportions in the NT and CH groups (P=0.001), as was the proportion of subjects with nocturnal hypertension (P<0.0001). There was less extreme dipping in RH, although the difference was not statistically significant (P=0.08). CONCLUSIONS A significantly higher prevalence of nondipping, nocturnal hypertension and nocturnal blood pressure rising in RH was demonstrated. These sleep disturbances or independently, their cause, may account for the difficulties in attaining blood pressure control.
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Affiliation(s)
- Oded Friedman
- Samuel Lunenfeld Research Institute, Mount Sinai Hospital, Toronto, Ontario M5G 1X5, Canada
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Friedman O, Logan AG. Can nocturnal hypertension predict cardiovascular risk? Integr Blood Press Control 2009; 2:25-37. [PMID: 21949613 PMCID: PMC3172086 DOI: 10.2147/ibpc.s4364] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2009] [Indexed: 11/23/2022] Open
Abstract
Nocturnal hypertension and non-dipping of blood pressure during sleep are distinct entities that often occur together and are regarded as important harbingers of poor cardiovascular prognosis. This review addresses several aspects related to these blood pressure abnormalities including definitions, diagnostic limitations, pathogenesis and associated patient profiles, prognostic significance, and therapeutic strategies. Taken together, persistent nocturnal hypertension and non-dipping blood pressure pattern, perhaps secondary to abnormal renal sodium handling and/or altered nocturnal sympathovagal balance, are strongly associated with deaths, cardiovascular events, and progressive loss of renal function, independent of daytime and 24-hour blood pressure. Several pharmacological and non-pharmacological approaches may restore nocturnal blood pressure and circadian blood pressure rhythm to normal; however, whether this translates to a clinically meaningful reduction in unfavorable cardiovascular and renal consequences remains to be seen.
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Affiliation(s)
- Oded Friedman
- Samuel Lunenfeld Research Institute, Division of Nephrology, Mount Sinai Hospital
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Abstract
Patients with chronic kidney disease have less than expected decline in blood pressure during sleep (nondipping) and commonly experience the vexing symptom of nocturia. To better understand the relationship among nocturia, nighttime physical activity, and nondipping, we studied 98 patients with chronic kidney disease on 2 occasions, 1 month apart, with 24-hour ambulatory blood pressure monitoring and simultaneous activity monitoring with wrist actigraphy. Patients with nocturia had greater actigraphically recorded nighttime physical activity compared to those with no nocturia. The drop in activity from wake to sleep was reduced to a similar extent whether the patients had nocturia once or twice, but patients who had nocturia ≥3 times had the least reduction from wake to sleep activity (
P
<0.001 versus those with less degrees of nocturia). Those with nocturia had a lesser drop in systolic ambulatory blood pressure during sleep compared with those without nocturia. The average fall in sleep systolic blood pressure was 9.8 mm Hg (95% CI: 8.0 to 11.6 mm Hg) in those without nocturia compared with 3.4 mm Hg (95% CI: 2.7 to 4.1 mm Hg) in those with any severity of nocturia (
P
<0.001 for difference). Nondipping in patients with nocturia was mediated by nighttime physical activity. These differences were independent of estimated glomerular filtration rate, albuminuria, or use of diuretics. Thus, nocturia, which may reflect impaired renal tubular function, is associated with nondipping in patients with chronic kidney disease and appears to be mediated by increased nocturnal activity. Whether nocturia itself or the resulting nondipping associated with nocturia is of prognostic importance for cardiorenal events in patients with chronic kidney disease should be tested in future studies.
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Affiliation(s)
- Rajiv Agarwal
- From the Indiana University School of Medicine (R.A., R.P.L., J.E.B., L.A.H.) and Richard L. Roudebush Veterans’ Administration Medical Center (R.A.), Indianapolis, Ind
| | - Robert P. Light
- From the Indiana University School of Medicine (R.A., R.P.L., J.E.B., L.A.H.) and Richard L. Roudebush Veterans’ Administration Medical Center (R.A.), Indianapolis, Ind
| | - Jennifer E. Bills
- From the Indiana University School of Medicine (R.A., R.P.L., J.E.B., L.A.H.) and Richard L. Roudebush Veterans’ Administration Medical Center (R.A.), Indianapolis, Ind
| | - Lindsey A. Hummel
- From the Indiana University School of Medicine (R.A., R.P.L., J.E.B., L.A.H.) and Richard L. Roudebush Veterans’ Administration Medical Center (R.A.), Indianapolis, Ind
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Tai MK, Meininger JC, Frazier LQ, Chan W. Ambulatory blood pressure and physical activity in heart failure. Biol Res Nurs 2009; 11:269-79. [PMID: 19617234 DOI: 10.1177/1099800409337731] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
This observational study used repeated measures over 24 hr to investigate ambulatory blood pressure (BP) and physical activity (PA) profiles in community-based individuals with heart failure (HF). The aims were to (a) compare BP dipping and PA between two groups of HF patients with different functional statuses, and (b) determine whether the strength of the association between ambulatory BP and PA varies by functional status in HF. Ambulatory BP was measured every 30 min with a SpaceLabs 90207; a Basic Motionlogger actigraph was used to measure PA minute-by-minute. Fifty-six participants (54% female, age 66.96 + or - 12.35 years) completed data collection. Functional status was based on New York Heart Association (NYHA) ratings. Twenty-seven patients had no limitation of PA (NYHA Class I HF), whereas 29 had some limitation of PA but no discomfort at rest (NYHA Class II or III HF). Patients with Class I HF had a significantly greater degree of BP dipping than those with Class II/III HF after controlling for left ventricular ejection fraction. In a mixed-model analysis, PA was significantly related to ambulatory systolic and diastolic BP and mean arterial pressure. The strength of the association between PA and BP was not significantly different for the two groups of patients. These findings demonstrate differences between Class I and Class II/II HF in BP dipping status and ambulatory BP but not PA. Longitudinal research is recommended to improve understanding of the influence of disease progression on changes in 24-hr PA and BP profiles of patients with HF.
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Affiliation(s)
- Mei-Kuei Tai
- Department of Nursing, Kaohsiung Medical University Hospital and School of Nursing, Kaohsiung Medical University, Kaohsiung, Taiwan.
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Routledge FS, McFetridge-Durdle JA, Dean CR. Stress, menopausal status and nocturnal blood pressure dipping patterns among hypertensive women. Can J Cardiol 2009; 25:e157-63. [PMID: 19536383 DOI: 10.1016/s0828-282x(09)70089-3] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND A less than 10% decline in blood pressure during the night is known as a nondipping blood pressure (BP) pattern. Nondipping BP has been shown to be associated with target organ damage and poorer cardiovascular outcomes. Additionally, some evidence suggests that hyper-tensive nondipping women are at greater risk for target organ damage than hypertensive nondipping men. OBJECTIVE To determine whether stress, demographics, menopausal status or sleep quality are associated with nondipping BP among hyperten-sive women. METHODS A cross-sectional study design was used to describe the rela-tionship between stress and dipping status among a sample of hypertensive women and to describe the sample by age, ethnicity, marital status, meno-pausal status, current medications and sleep quality. RESULTS The study sample consisted of 47 women (mean [+/- SD] age 57+/-13.9 years) with essential or office hypertension who underwent 24 h ambulatory BP monitoring, and completed stress and sleep quality measurements. Thirty-one women (66%) were classified as dippers and 16 (34%) were classified as nondippers. Nondippers were older (P=0.04), postmenopausal (P=0.003) and had lower stress scores (P=0.02) than their dipper counterparts. Postmenopausal status sig-nificantly predicted nondipping (OR 16; 95% CI 1.9 to 136.4). CONCLUSION These findings were of interest given that some women had a nondipping BP pattern and significantly lower stress scores. It is pos-sible that there are fundamentally different physiological mechanisms that explain this nondipping phenomenon. In the future, the identification of specific hemodynamic mechanisms associated with nondipping could potentially influence the choice of antihypertensive treatment regimens for nondipper hypertensive patients.
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Yilmaz MB, Yalta K, Turgut OO, Yilmaz A, Yucel O, Bektasoglu G, Tandogan I. Sleep quality among relatively younger patients with initial diagnosis of hypertension: Dippers versus non‐dippers. Blood Press 2009; 16:101-5. [PMID: 17612908 DOI: 10.1080/08037050701343225] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
BACKGROUND Sleep is a basic physiological process. Normal sleep yields decrease in sympathetic activity, blood pressure (BP) and heart rate. Those, who do not have expected decrease in their BP are considered "non-dippers". We aimed to determine if there was any association between the non-dipping status and sleep quality, designed a cross-sectional study, and enrolled and evaluated the sleep quality of relatively young patients with an initial diagnosis of hypertension. METHODS Seventy-five consecutive patients, diagnosed to have stage 1 hypertension by their primary physicians, were referred to our study. Patients had newly diagnosed with stage 1 hypertension. Patients with a prior use of any anti-hypertensive medication were not included. Eligible patients underwent the Pittsburgh Sleep Quality Index (PSQI), which has an established role in evaluating sleep disturbances. All patients underwent ambulatory BP monitoring. RESULTS There were 42 non-dipper patients (mean age = 47.5+/-11.9 years, 24 male/18 female), as a definition, 31 dipper hypertensive patients (mean age = 48.5+/-12.8 years, 21 male/10 female) and two with white coat hypertension. Daytime systolic and diastolic mean BPs were not significantly different between the two groups. Night-time mean systolic and diastolic BPs were significantly higher in non-dippers compared with dippers. PSQI scores, globally, were significantly higher in non-dippers compared with dippers. Total PSQI score was not correlated with body mass index. It was noticed that, individually, sleep quality, sleep efficiency and sleep disturbance scores were significantly higher in non-dippers. Being a poor sleeper in terms of high PSQI score (total score>5) was associated with 2.955-fold increased risk of being a non-dipper (95% confidence interval 1.127-7.747). CONCLUSION We showed that the risk of having non-dipping hypertension, a risk factor for poor cardiovascular outcomes among hypertensive individuals, was tripled (odds ratios) among poor sleepers. We think that evaluating sleeping status and sleep quality among the hypertensive population may help unmask non-dipper hypertension, enabling physicians to treat appropriately.
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Affiliation(s)
- Mehmet Birhan Yilmaz
- Cumhuriyet University, Faculty of Medicine, Department of Cardiology, Sivas, Turkey.
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Matsumoto M, Tsujino T, Naito Y, Sakoda T, Ohyanagi M, Nonaka H, Masuyama T. High Salt Intake Elevated Blood Pressure but not Changed Circadian Blood Pressure Rhythm in Otsuka Long-Evans Tokushima Fatty (OLETF) Rat. Clin Exp Hypertens 2009; 31:271-80. [DOI: 10.1080/10641960902822526] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Ino-Oka E, Sekino H, Kajikawa S, Inooka H, Imai Y, Hashimoto J. Involvement of Carotid Baroreceptor Function in Blood Pressure Control in the Chronic Phase: Effect on 24-Hour Ambulatory Blood Pressure. Clin Exp Hypertens 2009; 30:69-78. [DOI: 10.1080/10641960701815895] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Grassi G, Seravalle G, Quarti-Trevano F, Dell'Oro R, Bombelli M, Cuspidi C, Facchetti R, Bolla G, Mancia G. Adrenergic, Metabolic, and Reflex Abnormalities in Reverse and Extreme Dipper Hypertensives. Hypertension 2008; 52:925-31. [DOI: 10.1161/hypertensionaha.108.116368] [Citation(s) in RCA: 151] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Guido Grassi
- From the Clinica Medica (G.G., F.Q.-T., R.D., M.B., C.C., R.F., G.B., G.M.), Dipartimento di Medicina Clinica, Prevenzione e Biotecnologie Sanitarie, Università Milano-Bicocca, Ospedale San Gerardo, Monza (Milan) and Istituto Auxologico Italiano Milan (G.S.), Italy
| | - Gino Seravalle
- From the Clinica Medica (G.G., F.Q.-T., R.D., M.B., C.C., R.F., G.B., G.M.), Dipartimento di Medicina Clinica, Prevenzione e Biotecnologie Sanitarie, Università Milano-Bicocca, Ospedale San Gerardo, Monza (Milan) and Istituto Auxologico Italiano Milan (G.S.), Italy
| | - Fosca Quarti-Trevano
- From the Clinica Medica (G.G., F.Q.-T., R.D., M.B., C.C., R.F., G.B., G.M.), Dipartimento di Medicina Clinica, Prevenzione e Biotecnologie Sanitarie, Università Milano-Bicocca, Ospedale San Gerardo, Monza (Milan) and Istituto Auxologico Italiano Milan (G.S.), Italy
| | - Raffaella Dell'Oro
- From the Clinica Medica (G.G., F.Q.-T., R.D., M.B., C.C., R.F., G.B., G.M.), Dipartimento di Medicina Clinica, Prevenzione e Biotecnologie Sanitarie, Università Milano-Bicocca, Ospedale San Gerardo, Monza (Milan) and Istituto Auxologico Italiano Milan (G.S.), Italy
| | - Michele Bombelli
- From the Clinica Medica (G.G., F.Q.-T., R.D., M.B., C.C., R.F., G.B., G.M.), Dipartimento di Medicina Clinica, Prevenzione e Biotecnologie Sanitarie, Università Milano-Bicocca, Ospedale San Gerardo, Monza (Milan) and Istituto Auxologico Italiano Milan (G.S.), Italy
| | - Cesare Cuspidi
- From the Clinica Medica (G.G., F.Q.-T., R.D., M.B., C.C., R.F., G.B., G.M.), Dipartimento di Medicina Clinica, Prevenzione e Biotecnologie Sanitarie, Università Milano-Bicocca, Ospedale San Gerardo, Monza (Milan) and Istituto Auxologico Italiano Milan (G.S.), Italy
| | - Rita Facchetti
- From the Clinica Medica (G.G., F.Q.-T., R.D., M.B., C.C., R.F., G.B., G.M.), Dipartimento di Medicina Clinica, Prevenzione e Biotecnologie Sanitarie, Università Milano-Bicocca, Ospedale San Gerardo, Monza (Milan) and Istituto Auxologico Italiano Milan (G.S.), Italy
| | - Gianbattista Bolla
- From the Clinica Medica (G.G., F.Q.-T., R.D., M.B., C.C., R.F., G.B., G.M.), Dipartimento di Medicina Clinica, Prevenzione e Biotecnologie Sanitarie, Università Milano-Bicocca, Ospedale San Gerardo, Monza (Milan) and Istituto Auxologico Italiano Milan (G.S.), Italy
| | - Giuseppe Mancia
- From the Clinica Medica (G.G., F.Q.-T., R.D., M.B., C.C., R.F., G.B., G.M.), Dipartimento di Medicina Clinica, Prevenzione e Biotecnologie Sanitarie, Università Milano-Bicocca, Ospedale San Gerardo, Monza (Milan) and Istituto Auxologico Italiano Milan (G.S.), Italy
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Time-dependent adaptation in the hemodynamic response to hypoxia. Respir Physiol Neurobiol 2008; 165:90-6. [PMID: 19013546 DOI: 10.1016/j.resp.2008.10.013] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2008] [Revised: 09/19/2008] [Accepted: 10/16/2008] [Indexed: 11/20/2022]
Abstract
In rats, acute exposure to hypoxia causes a decrease in mean arterial pressure (MAP) caused by a predominance of hypoxic vasodilation over chemoreflex-induced vasoconstriction. We previously demonstrated that exposure to chronic intermittent hypoxia (CIH) impairs hypoxic vasodilation in isolated resistance arteries; therefore, we hypothesized that the acute systemic hemodynamic responses to hypoxia would be altered by exposure to CIH. To test this hypothesis, rats were exposed to CIH for 14 days. Heart rate (HR) and MAP were monitored by telemetry. On the first day of CIH exposure, acute episodes of hypoxia caused a decrease in MAP (-9+/-5 mmHg) and an increase in HR (+45+/-4 beats/min). On the 14th day of CIH exposure the depressor response was attenuated (-4+/-1mmHg; 44% of the day 1 response) and the tachycardia was enhanced (+68+/-2 beats/min; 151% of the day 1 response). The observed time-dependent modulation of the acute hemodynamic responses to hypoxia may reflect important changes in neurocirculatory regulation that contribute to CIH-induced hypertension.
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Agarwal R, Light RP. Physical activity and hemodynamic reactivity in chronic kidney disease. Clin J Am Soc Nephrol 2008; 3:1660-8. [PMID: 18922983 DOI: 10.2215/cjn.02920608] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
BACKGROUND AND OBJECTIVES Patients with chronic kidney disease (CKD) have an elevated cardiovascular risk. This study was designed to understand better the presence and strength of the relationship between physical activity and BP and to explore determinants of hemodynamic reactivity. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS Twenty-four patients with CKD (mean age 69.5 yr; 3.1 antihypertensive drugs; estimated GFR 47 ml/min per 1.73 m(2), albumin/creatinine ratio 403 mg/g) were studied on three occasions during a 6-wk period with 24-h ambulatory BP monitoring and simultaneous activity monitoring with wrist actigraphy. RESULTS Nondippers were found have a greater level of sleep activity compared with dippers, although the awake activity level was similar (7.06 versus 6.73) between groups (P = 0.042 for interaction). In 3587 BP activity pairs, hemodynamic reactivity was variable between individuals (systolic BP reactivity 1.06 [SD 10.50]; diastolic BP reactivity 0.89 [SD 7.80] heart rate reactivity 1.18 [SD 11.00]); those who were more sedentary had a greater increment in systolic BP compared with those who were less sedentary. Antihypertensive drugs blunted hemodynamic reactivity. Hemodynamic reactivity was greatest between 12 a.m. and 8 a.m., making this a vulnerable period for cardiovascular events. CONCLUSIONS Greater hemodynamic reactivity in sedentary people with CKD offers a possible and thus far unrecognized mechanism of cardiovascular damage. Besides reducing BP, antihypertensive drugs reduce hemodynamic reactivity, which offers another plausible mechanism of cardiovascular protection with their use.
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Affiliation(s)
- Rajiv Agarwal
- Indiana University School of Medicine, Indianapolis, Indiana, USA.
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