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Vriend EM, Bouwmeester TA, Franco OH, Galenkamp H, Zwinderman AH, van den Born BJH, Collard D. Sex differences in blood pressure phenotypes over time - the HELIUS study. J Hypertens 2024; 42:977-983. [PMID: 38372386 PMCID: PMC11064915 DOI: 10.1097/hjh.0000000000003676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 01/18/2024] [Indexed: 02/20/2024]
Abstract
BACKGROUND Hypertension can be classified into different phenotypes according to systolic and diastolic blood pressure (BP). In younger adults, these phenotypical differences have different prognostic value for men and women. However, little is known about sex differences in the natural course of different BP phenotypes over time. METHODS We used baseline and follow-up data from the multiethnic, population-based HELIUS study to assess differences in BP phenotypes over time in men and women aged < 45 years stratified according to baseline office BP into normotension (<140/<90 mmHg), isolated systolic hypertension (ISH, ≥140/<90 mmHg), isolated diastolic hypertension (IDH, <140/≥90 mmHg) or systolic diastolic hypertension (SDH, ≥140/≥90 mmHg). Logistic regression adjusted for age, ethnicity, and follow-up time was used to assess the risk of hypertension at follow-up (BP ≥140/90 mmHg or use of antihypertensive medication), stratified by sex. RESULTS We included 4103 participants [mean age 33.5 years (SD 7.4), 43.4% men] with a median follow-up time of 6.2 years. Compared to normotensive individuals, the age-adjusted odds ratios (OR) for having hypertension at follow-up were 4.78 (95% CI 2.90; 7.76) for ISH, 6.02 (95% CI 3.70; 9.74) for IDH and 33.73 (95% CI 20.35; 58.38) for SDH in men, while in women, OR were 10.08 (95% CI 4.09; 25.56) for ISH, 27.59 (95% CI 14.68; 53.82) for IDH and 50.58 (95% CI 24.78; 114.84) for SDH. CONCLUSIONS The risk of hypertension at follow-up was higher among women for all phenotypes compared to men, particularly in those with IDH. Findings of this study emphasize the importance of close BP monitoring in the young, especially in women.
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Affiliation(s)
- Esther M.C. Vriend
- Amsterdam UMC, University of Amsterdam, Department of Internal Medicine, Section Vascular Medicine, Amsterdam Cardiovascular Sciences
- Amsterdam UMC, University of Amsterdam, Department of Public and Occupational Health, Amsterdam Public Health Research Institute
| | - Thomas A. Bouwmeester
- Amsterdam UMC, University of Amsterdam, Department of Internal Medicine, Section Vascular Medicine, Amsterdam Cardiovascular Sciences
| | - Oscar H. Franco
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, Utrecht
| | - Henrike Galenkamp
- Amsterdam UMC, University of Amsterdam, Department of Public and Occupational Health, Amsterdam Public Health Research Institute
| | - Aeilko H. Zwinderman
- Amsterdam UMC, University of Amsterdam, Department of Epidemiology, Biostatistics & Bioinformatics, Amsterdam, The Netherlands
| | - Bert-Jan H. van den Born
- Amsterdam UMC, University of Amsterdam, Department of Internal Medicine, Section Vascular Medicine, Amsterdam Cardiovascular Sciences
- Amsterdam UMC, University of Amsterdam, Department of Public and Occupational Health, Amsterdam Public Health Research Institute
| | - Didier Collard
- Amsterdam UMC, University of Amsterdam, Department of Internal Medicine, Section Vascular Medicine, Amsterdam Cardiovascular Sciences
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Verdecchia P, Cavallini C, Sclafani R, Santucci A, Notaristefano F, Zingarini G, Colombo GA, Angeli F. Catheter-based renal artery denervation: facts and expectations. Eur J Intern Med 2023; 117:66-77. [PMID: 37544846 DOI: 10.1016/j.ejim.2023.07.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 07/27/2023] [Accepted: 07/31/2023] [Indexed: 08/08/2023]
Abstract
Catheter-based renal artery denervation (RAD) is entering a new era. After the disappointing results of SYMPLICITY-HTN 3 trial in year 2014, several technical and methodological advancements led to execution of important SHAM-controlled randomized trials with promising results. Now, the 2023 ESH Guidelines give RAD a class of recommendation II with a Level of Evidence B. Currently, catheter-based RAD has two main areas of application: (a) Hypertensive patients who are still untreated, in whom RAD is a sort of a first-line treatment; (b) Difficult-to-control or true resistant hypertensive patients. Notably, randomized SHAM-controlled trials met their primary end-point in both these conditions. So far, we do not dispose of established predictors of the antihypertensive response to RAD. Some data suggest that younger patients with systo-diastolic hypertension, absence of diffuse atherosclerosis and evidence of sympathetic nervous system overactivity experience a better BP response to the procedure. We reviewed the available data on catheter-based RAD and included an updated meta-analysis of the results of the available SHAM-controlled trials. Overall, the reduction in 24-h systolic blood pressure (BP) after RAD exceeded that after SHAM by 4.58 mmHg (95% CI 3.07-6.10) in untreated patients, and by 3.82 mmHg (95% CI 2.46-5.18) in treated patients, without significant heterogeneity across trials, patient phenotype (untreated versus treated patients) and technique (radiofrequency versus ultrasound). There were no important safety signals related to the procedure. Notably, some data suggest that RAD could be an effective additional approach in patients with atrial fibrillation and other conditions characterized by sympathetic nervous system overactivity.
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Affiliation(s)
- Paolo Verdecchia
- Division of Cardiology, Hospital S. Maria della Misericordia, Perugia, Italy.
| | - Claudio Cavallini
- Division of Cardiology, Hospital S. Maria della Misericordia, Perugia, Italy
| | - Rocco Sclafani
- Division of Cardiology, Hospital S. Maria della Misericordia, Perugia, Italy
| | - Andrea Santucci
- Division of Cardiology, Hospital S. Maria della Misericordia, Perugia, Italy
| | | | - Gianluca Zingarini
- Division of Cardiology, Hospital S. Maria della Misericordia, Perugia, Italy
| | - Giovanni Andrea Colombo
- Department of Medicine and Technological Innovation (DiMIT), University of Insubria, Varese and Department of Medicine and Cardiopulmonary Rehabilitation, Maugeri Care and Research Institute, IRCCS, Tradate, Italy
| | - Fabio Angeli
- Department of Medicine and Technological Innovation (DiMIT), University of Insubria, Varese and Department of Medicine and Cardiopulmonary Rehabilitation, Maugeri Care and Research Institute, IRCCS, Tradate, Italy
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Wang N, Harris K, Woodward M, Harrap S, Mancia G, Poulter N, Chalmers J, Rodgers A. Clinical Utility of Short-Term Blood Pressure Measures to Inform Long-Term Blood Pressure Management. Hypertension 2023; 80:608-617. [PMID: 36468403 DOI: 10.1161/hypertensionaha.122.20458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Decisions about hypertension management are substantially influenced by blood pressure (BP) levels measured before and soon after starting BP lowering drugs. We aimed to assess the utility of short-term BP changes in individuals in terms of long-term treatment response. METHODS Post hoc analyses of 2 randomized trials with 4-to-6 weeks active run-in for all participants, followed by randomization to active BP lowering treatment (combination perindopril±indapamide) or placebo. We categorized individuals by degree of systolic BP (SBP) change during active run-in treatment and assessed associations with subsequent postrandomization placebo-corrected BP reduction, cardiovascular events, and tolerability. We included individuals with baseline BP ≥140/90 mm Hg from the PROGRESS trial (Perindopril Protection Against Recurrent Stroke Study; 4275 individuals with cerebrovascular disease) and ADVANCE trial (The Action in Diabetes and Vascular Disease: Preterax and Diamicron-MR Controlled Evaluation; 6610 individuals with diabetes). RESULTS During the active run-in period, the proportion of participants with initial SBP changes in 4 categories (SBP increase, 0-9.9 mm Hg decrease, 10-19.9 mm Hg decrease, and ≥20 mm Hg decrease) were 17%, 27%, 28%, and 28% in PROGRESS and 21%, 22%, 24%, and 33% in ADVANCE. Randomization to active therapy achieved similar placebo-corrected long-term BP reductions across the 4 initial SBP change groups in both trials (P-values for heterogeneity >0.1). There was no significant difference in achieving BP <140/90 mm Hg at follow-up, major cardiovascular events, nor treatment tolerability according to the SBP change during active run-in period (all P-values >0.1). CONCLUSIONS An individual's apparent BP change immediately after commencing therapy has limited clinical utility. Therefore, more emphasis should be given to use of evidence-based regimens and measures over the long-term to ensure sustained BP control. REGISTRATION URL: https://www. CLINICALTRIALS gov; Unique identifier: NCT00145925.
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Affiliation(s)
- Nelson Wang
- The George Institute for Global Health UNSW, Sydney, Australia (N.W., K.H., M.W., J.C., A.R.).,Royal Prince Alfred Hospital, Sydney, Australia (N.W.).,Sydney Medical School, University of Sydney, Australia (N.W.)
| | - Katie Harris
- The George Institute for Global Health UNSW, Sydney, Australia (N.W., K.H., M.W., J.C., A.R.)
| | - Mark Woodward
- The George Institute for Global Health UNSW, Sydney, Australia (N.W., K.H., M.W., J.C., A.R.)
| | - Stephen Harrap
- Royal Melbourne Hospital, University of Melbourne, Victoria, Australia (S.H.)
| | | | - Neil Poulter
- School of Public Health, Imperial College London, United Kingdom (N.P.)
| | - John Chalmers
- The George Institute for Global Health UNSW, Sydney, Australia (N.W., K.H., M.W., J.C., A.R.)
| | - Anthony Rodgers
- The George Institute for Global Health UNSW, Sydney, Australia (N.W., K.H., M.W., J.C., A.R.)
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Keehn L, Hall WL, Berry SE, Sanders TA, Chowienczyk P, Floyd CN. Reproducibility of sequential ambulatory blood pressure and pulse wave velocity measurements in normotensive and hypertensive individuals. J Hypertens 2022; 40:2528-2537. [PMID: 36204998 PMCID: PMC9640295 DOI: 10.1097/hjh.0000000000003290] [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: 02/22/2022] [Revised: 07/22/2022] [Accepted: 08/11/2022] [Indexed: 11/25/2022]
Abstract
OBJECTIVE Errors in blood pressure (BP) measurement account for a large proportion of misclassified hypertension diagnoses. Ambulatory blood pressure monitoring (ABPM) is often considered to be the gold standard for measurement of BP, but uncertainty remains regarding the degree of measurement error. The aim of this study was to determine reproducibility of sequential ABPM in a population of normotensive and well controlled hypertensive individuals. METHODS Individual participant data from three randomized controlled trials, which had recorded ABPM and carotid-femoral pulse wave velocity (PWV) at least twice were combined ( n = 501). We calculated within-individual variability of daytime and night-time BP and compared the variability between normotensive ( n = 324) and hypertensive ( n = 177) individuals. As a secondary analysis, variability of PWV measurements was also calculated, and multivariable linear regression was used to assess characteristics associated with blood pressure variability (BPV). RESULTS Within-individual coefficient of variation (CoV) for systolic BP was 5.4% (day) and 7.0% (night). Equivalent values for diastolic BP were 6.1% and 8.4%, respectively. No statistically significant difference in CoV was demonstrated between measurements for normotensive and hypertensive individuals. Within-individual CoV for PWV exceeded that of BP measurements (10.7%). BPV was associated with mean pressures, and BMI for night-time measurements. PWV was not independently associated with BPV. CONCLUSION The variability of single ABPM measurements will still yield considerable uncertainty regarding true average pressures, potentially resulting in misclassification of hypertensive status and incorrect treatment regimes. Repeated ABPM may be necessary to refine antihypertensive therapy.
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Affiliation(s)
- Louise Keehn
- King's College London British Heart Foundation Centre, Department of Clinical Pharmacology, St Thomas’ Hospital
| | - Wendy L. Hall
- Department of Nutritional Sciences, Franklin-Wilkins Building, King's College London, London, UK
| | - Sarah E. Berry
- Department of Nutritional Sciences, Franklin-Wilkins Building, King's College London, London, UK
| | - Thomas A.B. Sanders
- Department of Nutritional Sciences, Franklin-Wilkins Building, King's College London, London, UK
| | - Phil Chowienczyk
- King's College London British Heart Foundation Centre, Department of Clinical Pharmacology, St Thomas’ Hospital
| | - Christopher N. Floyd
- King's College London British Heart Foundation Centre, Department of Clinical Pharmacology, St Thomas’ Hospital
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Smith CE, Metz M, Pierre JL, Rouzier V, Yan LD, Sufra R, Dade E, Preval F, Ariste W, Rivera V, Tymejczyk O, Peck R, Koenig S, Deschamps MM, Pape W, McNairy ML. Comparison of community and clinic-based blood pressure measurements: A cross-sectional study from Haiti. PLOS GLOBAL PUBLIC HEALTH 2022; 2:e0001064. [PMID: 36285251 PMCID: PMC9592070 DOI: 10.1371/journal.pgph.0001064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 09/03/2022] [Indexed: 11/19/2022]
Abstract
Hypertension (HTN) is the leading modifiable cardiovascular disease (CVD) risk factor in low and middle-income countries, and accurate and accessible blood pressure (BP) measurement is essential for identifying persons at risk. Given the convenience and increased use of community BP screening programs in low-income settings, we compared community and clinic BP measurements for participants in the Haiti CVD Cohort Study to determine the concordance of these two measurements. Participants were recruited using multistage random sampling from March 2019 to August 2021. HTN was defined as systolic BP (SBP) ≥ 140mmHg, diastolic BP (DBP) ≥ 90mmHg or taking antihypertensives according to WHO guidelines. Factors associated with concordance versus discordance of community and clinic BP measurements were assessed with multivariable Poisson regressions. Among 2,123 participants, median age was 41 years and 62% were female. Pearson correlation coefficients for clinic versus community SBP and DBP were 0.78 and 0.77, respectively. Using community BP measurements, 36% of participants screened positive for HTN compared with 30% using clinic BPs. The majority of participants had concordant measurements of normotension (59%) or HTN (26%) across both settings, with 4% having isolated elevated clinic BP (≥140/90 in clinic with normal community BP) and 10% with isolated elevated community BP (≥140/90 in community with normal clinic BP). These results underscore community BP measurements as a feasible and accurate way to increase HTN screening and estimate HTN prevalence for vulnerable populations with barriers to clinic access.
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Affiliation(s)
- Caleigh E. Smith
- Department of Medicine, Center for Global Health, Weill Cornell Medicine, New York, New York, United States of America
| | - Miranda Metz
- Department of Medicine, Center for Global Health, Weill Cornell Medicine, New York, New York, United States of America
| | - Jean Lookens Pierre
- Haitian Group for the Study of Kaposi’s Sarcoma and Opportunistic Infections (GHESKIO), Port-au-Prince, Haiti
| | - Vanessa Rouzier
- Department of Medicine, Center for Global Health, Weill Cornell Medicine, New York, New York, United States of America
- Haitian Group for the Study of Kaposi’s Sarcoma and Opportunistic Infections (GHESKIO), Port-au-Prince, Haiti
| | - Lily D. Yan
- Department of Medicine, Center for Global Health, Weill Cornell Medicine, New York, New York, United States of America
- Division of General Internal Medicine, Department of Medicine, Weill Cornell Medicine, New York, New York, United States of America
| | - Rodney Sufra
- Haitian Group for the Study of Kaposi’s Sarcoma and Opportunistic Infections (GHESKIO), Port-au-Prince, Haiti
| | - Eliezer Dade
- Haitian Group for the Study of Kaposi’s Sarcoma and Opportunistic Infections (GHESKIO), Port-au-Prince, Haiti
| | - Fabyola Preval
- Haitian Group for the Study of Kaposi’s Sarcoma and Opportunistic Infections (GHESKIO), Port-au-Prince, Haiti
| | - Wilson Ariste
- Haitian Group for the Study of Kaposi’s Sarcoma and Opportunistic Infections (GHESKIO), Port-au-Prince, Haiti
| | - Vanessa Rivera
- Department of Medicine, Center for Global Health, Weill Cornell Medicine, New York, New York, United States of America
- Haitian Group for the Study of Kaposi’s Sarcoma and Opportunistic Infections (GHESKIO), Port-au-Prince, Haiti
| | - Olga Tymejczyk
- City University of New York Institute for Implementation Science in Population Health, New York, NY, United States of America
| | - Rob Peck
- Department of Medicine, Center for Global Health, Weill Cornell Medicine, New York, New York, United States of America
| | - Serena Koenig
- Department of Medicine, Brigham and Women’s Hospital, Boston, Massachusetts, United States of America
| | - Marie Marcelle Deschamps
- Haitian Group for the Study of Kaposi’s Sarcoma and Opportunistic Infections (GHESKIO), Port-au-Prince, Haiti
| | - William Pape
- Department of Medicine, Center for Global Health, Weill Cornell Medicine, New York, New York, United States of America
- Haitian Group for the Study of Kaposi’s Sarcoma and Opportunistic Infections (GHESKIO), Port-au-Prince, Haiti
| | - Margaret L. McNairy
- Department of Medicine, Center for Global Health, Weill Cornell Medicine, New York, New York, United States of America
- Division of General Internal Medicine, Department of Medicine, Weill Cornell Medicine, New York, New York, United States of America
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Gritter M, Wouda RD, Yeung SM, Wieërs ML, Geurts F, de Ridder MA, Ramakers CR, Vogt L, de Borst MH, Rotmans JI, Hoorn EJ. Effects of Short-Term Potassium Chloride Supplementation in Patients with CKD. J Am Soc Nephrol 2022; 33:1779-1789. [PMID: 35609996 PMCID: PMC9529195 DOI: 10.1681/asn.2022020147] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 03/02/2022] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND Observational studies suggest that adequate dietary potassium intake (90-120 mmol/day) may be renoprotective, but the effects of increasing dietary potassium and the risk of hyperkalemia are unknown. METHODS This is a prespecified analysis of the run-in phase of a clinical trial in which 191 patients (age 68±11 years, 74% males, 86% European ancestry, eGFR 31±9 ml/min per 1.73 m2, 83% renin-angiotensin system inhibitors, 38% diabetes) were treated with 40 mmol potassium chloride (KCl) per day for 2 weeks. RESULTS KCl supplementation significantly increased urinary potassium excretion (72±24 to 107±29 mmol/day), plasma potassium (4.3±0.5 to 4.7±0.6 mmol/L), and plasma aldosterone (281 [198-431] to 351 [241-494] ng/L), but had no significant effect on urinary sodium excretion, plasma renin, BP, eGFR, or albuminuria. Furthermore, KCl supplementation increased plasma chloride (104±3 to 105±4 mmol/L) and reduced plasma bicarbonate (24.5±3.4 to 23.7±3.5 mmol/L) and urine pH (all P<0.001), but did not change urinary ammonium excretion. In total, 21 participants (11%) developed hyperkalemia (plasma potassium 5.9±0.4 mmol/L). They were older and had higher baseline plasma potassium. CONCLUSIONS In patients with CKD stage G3b-4, increasing dietary potassium intake to recommended levels with potassium chloride supplementation raises plasma potassium by 0.4 mmol/L. This may result in hyperkalemia in older patients or those with higher baseline plasma potassium. Longer-term studies should address whether cardiorenal protection outweighs the risk of hyperkalemia.Clinical trial number: NCT03253172.
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Affiliation(s)
- Martin Gritter
- Department of Internal Medicine, Division of Nephrology and Transplantation, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Rosa D. Wouda
- Division of Nephrology, Amsterdam University Medical Center, Amsterdam, The Netherlands
| | - Stanley M.H. Yeung
- Division of Nephrology, University Medical Center Groningen, Groningen, The Netherlands
| | - Michiel L.A. Wieërs
- Department of Internal Medicine, Division of Nephrology and Transplantation, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Frank Geurts
- Department of Internal Medicine, Division of Nephrology and Transplantation, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Maria A.J. de Ridder
- Department of Medical Informatics, Erasmus Medical Center, Rotterdam, The Netherlands
| | | | - Liffert Vogt
- Division of Nephrology, Amsterdam University Medical Center, Amsterdam, The Netherlands
| | - Martin H. de Borst
- Division of Nephrology, University Medical Center Groningen, Groningen, The Netherlands
| | - Joris I. Rotmans
- Department of Internal Medicine, Division of Nephrology, Leiden University Medical Center, Leiden, The Netherlands
| | - Ewout J. Hoorn
- Department of Internal Medicine, Division of Nephrology and Transplantation, Erasmus Medical Center, Rotterdam, The Netherlands
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Khan M, Olivier J. Regression to the mean: Estimation and adjustment under the bivariate normal distribution. COMMUN STAT-THEOR M 2022. [DOI: 10.1080/03610926.2022.2037645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Manzoor Khan
- Department of Statistics, Quaid-i-Azam University, Islamabad, Pakistan
| | - Jake Olivier
- School of Mathematics and Statistics, University of New South Wales, Sydney, Australia
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Validation of a Practical Approach to Blood Pressure Measurement: Secondary Analysis of Data from a Nationally Representative Survey in India. Glob Heart 2022; 16:87. [PMID: 35141128 PMCID: PMC8698233 DOI: 10.5334/gh.1085] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 11/15/2021] [Indexed: 01/09/2023] Open
Abstract
Background Clinical guidelines differ on the recommended number of blood pressure (BP) measurements for hypertension diagnosis in primary health care settings. We assessed the accuracy in identifying high BP (≥140/90 mmHg) and efficiency (mean BP measures per person in one visit) of a practical BP measurement approach against the research standard. Methods We analyzed data from a national survey in India with three BP measurements for each adult participant (N = 372,110). The research standard (referred to as 'standard approach') is measuring three BP and using the mean of the last two. In the practical approach, the first BP reading was used if the measure was <140/90 mmHg; the second BP was used if the first BP was ≥140/90 mmHg. If the difference between either the first two systolic or diastolic BPs was >5 mmHg, then we used the third reading. Results Prevalence of high BP was 15.5% and 14.9% using standard and practical approaches, respectively. The sensitivity, specificity, false positive, and false negative rates of the practical approach were 85.4%, 98.0%, 11.3%, and 2.7% compared to the standard approach. The practical approach was more resource-efficient (mean BPs/person/visit 1.4 versus 3.0 for the standard approach). The practical approach had similar validity, but higher efficiency compared to other internationally recommended BP measurement protocols. Conclusion The practical BP measurement approach has high validity, is simpler and involves a lower measurement burden on health care providers and can improve the utility of BP measurement, hypertension diagnosis, and management in busy primary health care settings.
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Decaux A, Edwards JJ, Swift HT, Hurst P, Hopkins J, Wiles JD, O’Driscoll JM. Blood pressure and cardiac autonomic adaptations to isometric exercise training: A randomized sham-controlled study. Physiol Rep 2022; 10:e15112. [PMID: 35083878 PMCID: PMC8792514 DOI: 10.14814/phy2.15112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 10/21/2021] [Accepted: 10/27/2021] [Indexed: 12/02/2022] Open
Abstract
Isometric exercise training (IET) is increasingly cited for its role in reducing resting blood pressure (BP). Despite this, few studies have investigated a potential sham effect attributing to the success of IET, thus dictating the aim of the present study. Thirty physically inactive males (n = 15) and females (n = 15) were randomly assigned into three groups. The IET group completed a wall squat intervention at 95% peak heart rate (HR) using a prescribed knee joint angle. The sham group performed a parallel intervention, but at an intensity (<75% peak HR) previously identified to be inefficacious over a 4-week training period. No-intervention controls maintained their normal daily activities. Pre- and post-measures were taken for resting and continuous blood pressure and cardiac autonomic modulation. Resting clinic and continuous beat-to-beat systolic (-15.2 ± 9.2 and -7.3 ± 5.6 mmHg), diastolic (-4.6 ± 5 and -4.5 ± 5.1), and mean (-7 ± 4.2 and -7.5 ± 5.3) BP, respectively, all significantly decreased in the IET group compared to sham and no-intervention control. The IET group observed a significant decrease in low-frequency normalized units of heart rate variability concurrent with a significant increase in high-frequency normalized units of heart rate variability compared to both the sham and no-intervention control groups. The findings of the present study reject a nonspecific effect and further support the role of IET as an effective antihypertensive intervention. Clinical Trials ID: NCT05025202.
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Affiliation(s)
- Anthony Decaux
- School of Psychology and Life SciencesCanterbury Christ Church UniversityKentUK
| | - Jamie J. Edwards
- School of Psychology and Life SciencesCanterbury Christ Church UniversityKentUK
| | - Harry T. Swift
- School of Psychology and Life SciencesCanterbury Christ Church UniversityKentUK
| | - Philip Hurst
- School of Psychology and Life SciencesCanterbury Christ Church UniversityKentUK
| | - Jordan Hopkins
- School of Psychology and Life SciencesCanterbury Christ Church UniversityKentUK
| | - Jonathan D. Wiles
- School of Psychology and Life SciencesCanterbury Christ Church UniversityKentUK
| | - Jamie M. O’Driscoll
- School of Psychology and Life SciencesCanterbury Christ Church UniversityKentUK
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Viera AJ, Yano Y, Lin FC, Simel DL, Yun J, Dave G, Von Holle A, Viera LA, Shimbo D, Hardy ST, Donahue KE, Hinderliter A, Voisin CE, Jonas DE. Does This Adult Patient Have Hypertension?: The Rational Clinical Examination Systematic Review. JAMA 2021; 326:339-347. [PMID: 34313682 DOI: 10.1001/jama.2021.4533] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
IMPORTANCE Office blood pressure (BP) measurements are not the most accurate method to diagnose hypertension. Home BP monitoring (HBPM) and 24-hour ambulatory BP monitoring (ABPM) are out-of-office alternatives, and ABPM is considered the reference standard for BP assessment. OBJECTIVE To systematically review the accuracy of oscillometric office and home BP measurement methods for correctly classifying adults as having hypertension, defined using ABPM. DATA SOURCES PubMed, Cochrane Library, Embase, ClinicalTrials.gov, and DARE databases and the American Heart Association website (from inception to April 2021) were searched, along with reference lists from retrieved articles. DATA EXTRACTION AND SYNTHESIS Two authors independently abstracted raw data and assessed methodological quality. A third author resolved disputes as needed. MAIN OUTCOMES AND MEASURES Random effects summary sensitivity, specificity, and likelihood ratios (LRs) were calculated for BP measurement methods for the diagnosis of hypertension. ABPM (24-hour mean BP ≥130/80 mm Hg or mean BP while awake ≥135/85 mm Hg) was considered the reference standard. RESULTS A total of 12 cross-sectional studies (n = 6877) that compared conventional oscillometric office BP measurements to mean BP during 24-hour ABPM and 6 studies (n = 2049) that compared mean BP on HBPM to mean BP during 24-hour ABPM were included (range, 117-2209 participants per analysis); 2 of these studies (n = 3040) used consecutive samples. The overall prevalence of hypertension identified by 24-hour ABPM was 49% (95% CI, 39%-60%) in the pooled studies that evaluated office measures and 54% (95% CI, 39%-69%) in studies that evaluated HBPM. All included studies assessed sensitivity and specificity at the office BP threshold of 140/90 mm Hg and the home BP threshold of 135/85 mm Hg. Conventional office oscillometric measurement (1-5 measurements in a single visit with BP ≥140/90 mm Hg) had a sensitivity of 51% (95% CI, 36%-67%), specificity of 88% (95% CI, 80%-96%), positive LR of 4.2 (95% CI, 2.5-6.0), and negative LR of 0.56 (95% CI, 0.42-0.69). Mean BP with HBPM (with BP ≥135/85 mm Hg) had a sensitivity of 75% (95% CI, 65%-86%), specificity of 76% (95% CI, 65%-86%), positive LR of 3.1 (95% CI, 2.2-4.0), and negative LR of 0.33 (95% CI, 0.20-0.47). Two studies (1 with a consecutive sample) that compared unattended automated mean office BP (with BP ≥135/85 mm Hg) with 24-hour ABPM had sensitivity ranging from 48% to 51% and specificity ranging from 80% to 91%. One study that compared attended automated mean office BP (with BP ≥140/90 mm Hg) with 24-hour ABPM had a sensitivity of 87.6% (95% CI, 83%-92%) and specificity of 24.1% (95% CI, 16%-32%). CONCLUSIONS AND RELEVANCE Office measurements of BP may not be accurate enough to rule in or rule out hypertension; HBPM may be helpful to confirm a diagnosis. When there is uncertainty around threshold values or when office and HBPM are not in agreement, 24-hour ABPM should be considered to establish the diagnosis.
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Affiliation(s)
- Anthony J Viera
- Department of Family Medicine and Community Health, Duke University School of Medicine, Durham, North Carolina
| | - Yuichiro Yano
- Department of Family Medicine and Community Health, Duke University School of Medicine, Durham, North Carolina
- Center for Novel and Exploratory Clinical Trials, Yokohama City University, Yokohama, Japan
| | - Feng-Chang Lin
- Department of Biostatistics, University of North Carolina at Chapel Hill, Chapel Hill
| | - David L Simel
- Durham Veterans Affairs Health System and Department of Medicine, Duke University School of Medicine, Durham, North Carolina
| | | | - Gaurav Dave
- Department of Medicine, Division of General Internal Medicine and Clinical Epidemiology, University of North Carolina at Chapel Hill
| | | | - Laura A Viera
- North Carolina Translational and Clinical Sciences Institute, University of North Carolina at Chapel Hill
| | - Daichi Shimbo
- Department of Medicine, Columbia University Irving Medical Center, New York, New York
| | - Shakia T Hardy
- Department of Epidemiology, University of Alabama at Birmingham
| | - Katrina E Donahue
- Department of Family Medicine, University of North Carolina at Chapel Hill
- Sheps Center for Health Services Research, University of North Carolina at Chapel Hill
| | - Alan Hinderliter
- Department of Medicine, Division of Cardiology, University of North Carolina at Chapel Hill
| | - Christiane E Voisin
- Sheps Center for Health Services Research, University of North Carolina at Chapel Hill
| | - Daniel E Jonas
- Department of Medicine, Division of General Internal Medicine and Clinical Epidemiology, University of North Carolina at Chapel Hill
- Sheps Center for Health Services Research, University of North Carolina at Chapel Hill
- now with Department of Internal Medicine, Division of General Internal Medicine, The Ohio State University
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11
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Martinez-Garcia MA, Pengo MF. Clinical Phenotype of Resistant Hypertension Responders to Continuous Positive Airway Pressure Treatment: Results From the HIPARCO Randomized Clinical Trial. Hypertension 2021; 78:559-561. [PMID: 34148360 DOI: 10.1161/hypertensionaha.121.17364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Miguel Angel Martinez-Garcia
- Pneumology Department, Hospital Universitario y Politécnico la fe, Valencia, Spain (M.A.M.-G.).,CIBERES de enfermedades Respiratorias, Madrid, Spain (M.A.M.-G.)
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12
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Diallo AO, Ali MK, Geldsetzer P, Gower EW, Mukama T, Wagner RG, Davies J, Bijlsma MJ, Sudharsanan N. Systolic blood pressure and 6-year mortality in South Africa: a country-wide, population-based cohort study. THE LANCET. HEALTHY LONGEVITY 2021; 2:e78-e86. [DOI: 10.1016/s2666-7568(20)30050-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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13
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Ferreira JP, Fitchett D, Ofstad AP, Kraus BJ, Wanner C, Zwiener I, Zinman B, Lauer S, George JT, Rossignol P, Zannad F. Empagliflozin for Patients With Presumed Resistant Hypertension: A Post Hoc Analysis of the EMPA-REG OUTCOME Trial. Am J Hypertens 2020; 33:1092-1101. [PMID: 32369546 PMCID: PMC7814223 DOI: 10.1093/ajh/hpaa073] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Revised: 03/13/2020] [Accepted: 04/29/2020] [Indexed: 01/24/2023] Open
Abstract
BACKGROUND Type 2 diabetes (T2D) and resistant hypertension often coexist, greatly increasing risk of target-organ damage and death. We explored the effects of empagliflozin in patients with and without presumed resistant hypertension (prHT) in a post hoc analysis of EMPA-REG OUTCOME (NCT01131676). METHODS Overall, 7,020 patients received empagliflozin 10, 25 mg, or placebo with median follow-up of 3.1 years. We defined baseline prHT as ≥3 classes of antihypertensive drugs including a diuretic and uncontrolled blood pressure (BP; systolic blood pressure (SBP) ≥140 and/or diastolic blood pressure ≥90 mm Hg) or ≥4 classes of antihypertensive, including a diuretic, and controlled BP. We explored the effect of empagliflozin on cardiovascular (CV) death, heart failure (HF) hospitalization, 3-point major adverse cardiac events, all-cause death, and incident/worsening nephropathy by Cox regression and BP over time by a mixed-repeated-measures-model analysis. RESULTS 1,579 (22.5%) patients had prHT. The mean difference in change in SBP from baseline to week 12 vs. placebo was -4.5 (95% confidence interval, -5.9 to -3.1) mm Hg (P < 0.001) in prHT and -3.7 (-4.5, -2.9) mm Hg (P < 0.001) in patients without prHT. SBP was more frequently controlled (<130/80 mm Hg) with empagliflozin than with placebo. Patients with prHT had 1.5- to 2-fold greater risk of HF hospitalization, incident/worsening nephropathy, and CV death compared with those without prHT. Empagliflozin improved all outcomes in patients with and without prHT (interaction P > 0.1 for all outcomes). CONCLUSIONS Empagliflozin induced a clinically relevant reduction in SBP and consistently improved all outcomes regardless of prHT status. Due to these dual effects, empagliflozin should be considered for patients with hypertension and T2D.
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Affiliation(s)
- João Pedro Ferreira
- Université de Lorraine, Centre d’Investigations Cliniques Plurithématique Inserm 1433, Nancy, France
- CHRU de Nancy, Inserm U1116, Nancy, France
- FCRIN INI-CRCT, Nancy, France
| | - David Fitchett
- Division of Cardiology, St Michael’s Hospital, University of Toronto, Toronto, Ontario, Canada
| | | | - Bettina Johanna Kraus
- Comprehensive Heart Failure Center, University of Würzburg, Würzburg, Germany
- Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany
| | - Christoph Wanner
- Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany
| | | | - Bernard Zinman
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Sabine Lauer
- Boehringer Ingelheim Pharma GmbH & Co. KG, Ingelheim, Germany
| | | | - Patrick Rossignol
- Université de Lorraine, Centre d’Investigations Cliniques Plurithématique Inserm 1433, Nancy, France
- CHRU de Nancy, Inserm U1116, Nancy, France
- FCRIN INI-CRCT, Nancy, France
| | - Faiez Zannad
- Université de Lorraine, Centre d’Investigations Cliniques Plurithématique Inserm 1433, Nancy, France
- CHRU de Nancy, Inserm U1116, Nancy, France
- FCRIN INI-CRCT, Nancy, France
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14
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Ma Y, Tully PJ, Hofman A, Tzourio C. Blood Pressure Variability and Dementia: A State-of-the-Art Review. Am J Hypertens 2020; 33:1059-1066. [PMID: 32710605 DOI: 10.1093/ajh/hpaa119] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 07/17/2020] [Accepted: 07/21/2020] [Indexed: 12/30/2022] Open
Abstract
Accumulating evidence demonstrates that blood pressure variability (BPV) may contribute to target organ damage, causing coronary heart disease, stroke, and renal disease independent of the level of blood pressure (BP). Several lines of evidence have also linked increased BPV to a higher risk of cognitive decline and incident dementia. The estimated number of dementia cases worldwide is nearly 50 million, and this number continues to grow with increasing life expectancy. Because there is no effective treatment to modify the course of dementia, targeting modifiable vascular factors continues as a top priority for dementia prevention. A clear understanding of the role of BPV in dementia may shed light on the etiology, early prevention, and novel therapeutic targets of dementia, and has therefore gained substantial attention from researchers and clinicians. This review summarizes state-of-art evidence on the relationship between BPV and dementia, with a specific focus on the epidemiological evidence, the underlying mechanisms, and potential intervention strategies. We also discuss challenges and opportunities for future research to facilitate optimal BP management and the clinical translation of BPV for the risk assessment and prevention of dementia.
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Affiliation(s)
- Yuan Ma
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
| | - Phillip J Tully
- School of Medicine, The University of Adelaide, Adelaide, Australia
| | - Albert Hofman
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
| | - Christophe Tzourio
- Univ. Bordeaux, Inserm, Bordeaux Population Health Research Center, UMR 1219, CHU Bordeaux, Bordeaux, France
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15
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Gosse P, Cremer A, Kirtane AJ, Lobo MD, Saxena M, Daemen J, Wang Y, Stegbauer J, Weber MA, Abraham J, Kario K, Bangalore S, Claude L, Liu Y, Azizi M. Ambulatory Blood Pressure Monitoring to Predict Response to Renal Denervation: A Post Hoc Analysis of the RADIANCE-HTN SOLO Study. Hypertension 2020; 77:529-536. [PMID: 33356403 DOI: 10.1161/hypertensionaha.120.16292] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Renal denervation (RDN) is effective in lowering blood pressure (BP) in patients with hypertension. The issue remains how to best identify potential responders. Ambulatory BP monitoring may be useful. Baseline nighttime systolic BP (SBP) ≥136 mm Hg and its variability (SD) ≥12 mm Hg in DENER-HTN trial or 24-hour heart rate ≥73.5 bpm in SPYRAL HTN-OFF MED Trial were shown to predict the BP response to RDN. We applied these criteria to the patients with hypertension in the sham-controlled RADIANCE-HTN SOLO trial to predict the BP response to ultrasound RDN at 2 months while patients were maintained off medications. BP responders were defined as: clinical with 24-hour SBP <130 mm Hg (RDN: 22/64 versus sham: 7/58); meaningful with 24-hour SBP reduction ≥10 mm Hg (RDN: 24/64, sham: 7/58); and extreme with 24-hour SBP reduction above mean+2 SD of the SBP decrease in the sham group, that is, ≥16.5 mm Hg (RDN: 10/64 versus sham: 2/58). The predictive criteria reported above were tested for sensitivity, specificity, and positive and negative predictive values. The predictive value varied according to the definition of response, with the clinical definition being strongly influenced by regression to the mean. Baseline nighttime SBP and its variability, especially when combined, offered good specificity (>90% irrespective of definition) but low sensitivity (from 9.1% to 30% depending on the definition) to predict responders; the heart rate criterion had insufficient predictive value. This analysis suggests the potential role of nighttime SBP and its variability to predict BP response to RDN in patients with hypertension. Registration: URL: https://www.clinicaltrials.gov; Unique identifier: NCT02649426.
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Affiliation(s)
- Philippe Gosse
- From the Hôpital Saint-André-CHU, Bordeaux, France (P.G., A.C.)
| | - Antoine Cremer
- From the Hôpital Saint-André-CHU, Bordeaux, France (P.G., A.C.)
| | - Ajay J Kirtane
- Columbia University Medical Center/New York-Presbyterian Hospital and the Cardiovascular Research Foundation (A.J.K.)
| | - Melvin D Lobo
- Barts NIHR Biomedical Research Centre, William Harvey Research Institute, Queen Mary University of London, United Kingdom (M.D.L., M.S.)
| | - Manish Saxena
- Barts NIHR Biomedical Research Centre, William Harvey Research Institute, Queen Mary University of London, United Kingdom (M.D.L., M.S.)
| | - Joost Daemen
- Department of Cardiology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, NL, the Netherlands (J.D.)
| | - Yale Wang
- Minneapolis Heart Institute, Abbott Northwestern Hospital, MN (Y.W.)
| | - Johannes Stegbauer
- Department of Nephrology, Medical Faculty, University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Germany (J.S.)
| | - Michael A Weber
- Division of Cardiovascular Medicine, State University of New York, Downstate Medical Center (M.A.W.)
| | - Josephine Abraham
- Division of Nephrology and Hypertension, University of Utah, Salt lake city (J.A.)
| | - Kazuomi Kario
- Division of Cardiovascular Medicine, Department of Medicine, Jichi Medical University School of Medicine, Tochigi, Japan (K.K.)
| | | | | | - Yuyin Liu
- Baim Institute for Clinical Research, Boston, MA (Y.L.)
| | - Michel Azizi
- Université de Paris, F-75006 Paris, France (M.A.).,AP-HP, Hôpital Européen Georges-Pompidou, Hypertension Department and DMU CARTE, F-75015 Paris, France (M.A.).,INSERM, CIC1418, F-75015 Paris, France (M.A.)
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16
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Sano H, Hara A, Asayama K, Miyazaki S, Kikuya M, Imai Y, Ohkubo T. Antihypertensive drug effects according to the pretreatment self-measured home blood pressure: the HOMED-BP study. BMJ Open 2020; 10:e040524. [PMID: 33310801 PMCID: PMC7735093 DOI: 10.1136/bmjopen-2020-040524] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVES To clarify whether or not the antihypertensive drug effect is proportional to the baseline pretreatment self-measured home blood pressure (HBP) in accordance with the law of initial value (Wilder's law). DESIGN A post-hoc analysis of a multicentre clinical trial. SETTING Outpatients across Japan with mild-to-moderate essential hypertension. PARTICIPANTS Among 3518 randomised participants, 2423 who self-measured HBP during the pretreatment drug-free period (10-28 days after starting fixed-dose antihypertensive monotherapy) with a mean 7.0 years follow-up were eligible. MAIN OUTCOME MEASURES We analysed individual HBP readings during pretreatment and monotherapy. RESULTS The day-to-day HBP during both the pretreatment period and monotherapy period remains almost the same throughout each period; the results were consistent, regardless of the pretreatment HBP. Following monotherapy, the reduction in the HBP increased by 2.2 mm Hg (95% CI: 1.8 to 2.5 mm Hg) per 10 mm Hg pretreatment HBP increase, up to 11.0 mm Hg (95% CI: 9.9 to 12.0 mm Hg) among patients with an HBP ≥165 mm Hg during pretreatment. Among the 1005 patients receiving low-dose monotherapy (defined daily dose: 0.5 units), the reduction peaked at 8.9-9.1 mm Hg in those with pretreatment HBP 155-164 mm Hg and ≥165 mm Hg (p=0.88). CONCLUSIONS According to Wilder's law, the HBP reduction due to fixed-dose monotherapy was proportional to the pretreatment HBP without any regression to the mean phenomenon. With low-dose antihypertensive drugs, however, the HBP reduction peaked in patients with a high pretreatment HBP, indicating the need for such patients to receive a sufficient amount of antihypertensive drug medication at the initial treatment. TRIAL REGISTRATION UMIN Clinical Trial Registry (http://www.umin.ac.jp/ctr), Unique identifier: C000000137.
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Affiliation(s)
- Hikari Sano
- Social Pharmacy and Regulatory Science, Showa Pharmaceutical University, Machida, Japan
| | - Azusa Hara
- Division of Drug Development and Regulatory Science, Faculty of Pharmacy, Keio University, Minato-ku, Japan
| | - Kei Asayama
- Research Unit Hypertension and Cardiovascular Epidemiology, KU Leuven Cardiovascular Sciences, Leuven, Belgium
- Hygiene and Public Health, Teikyo University School of Medicine, Itabashi-ku, Japan
- Tohoku Institute for Management of Blood Pressure, Sendai, Japan
| | - Seiko Miyazaki
- Social Pharmacy and Regulatory Science, Showa Pharmaceutical University, Machida, Japan
| | - Masahiro Kikuya
- Hygiene and Public Health, Teikyo University School of Medicine, Itabashi-ku, Japan
| | - Yutaka Imai
- Tohoku Institute for Management of Blood Pressure, Sendai, Japan
| | - Takayoshi Ohkubo
- Hygiene and Public Health, Teikyo University School of Medicine, Itabashi-ku, Japan
- Tohoku Institute for Management of Blood Pressure, Sendai, Japan
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17
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Warda HM, Elshorbagy AK, Habib A, Wagdi A, Mihailidou AS, Warda M. Blood pressure measurement protocol determines hypertension phenotypes in a Middle Eastern population. J Clin Hypertens (Greenwich) 2020; 22:1995-2003. [PMID: 32941678 DOI: 10.1111/jch.14048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 08/19/2020] [Accepted: 08/21/2020] [Indexed: 11/29/2022]
Abstract
Clinic blood pressure (BP) measurement remains a crucial step in managing hypertension. While the number of measures recorded in different settings varies, with typically 1-3 measures, there has been no prior justification for the actual number of measures required. We investigated the pattern of BP variability over 5 consecutive automated readings (R1-R5) and the influence of patient characteristics on this pattern to identify the phenotype of hypertension in a Middle Eastern population. There were 1389 outpatients (51% men, 49% women), age range (18-87 y) who had 5 unattended automated consecutive BP measurements with one-minute intervals using the validated Datascope Mindray Passport V Monitor with the patient blinded from the results. Mean (±SEM) SBP for R1 (136.0 ± 2 mm Hg) was similar to R2 (136.2 ± 2 mm Hg). Thereafter SBP progressively declined till R5 by total of 5.5 mm Hg. The SBP decline was less (4.2 mm Hg) in older (>50 years) vs younger participants (8.1 mm Hg; P < .001) and was blunted in diabetic and hypertensive participants. Overall, 43% of participants had R2 > R1, and 24% additionally had R5 > R1. Age was a strong independent predictor of having both R2 > R1 and R5 > R1, as well as diabetes. Diastolic blood pressure (DBP) decreased by average 2.8 mm Hg from R1 to R5. Females had a 5-fold greater total decline in DBP vs males (P < .001). Using the mean of 5 BP measures resulted in fewer participants being classified as hypertensive (36% of the population) compared to using one measurement (46%), or established BP guidelines which use different combinations of R1-R3 (37%-42%). Our findings in a Middle Eastern population highlight the importance of the BP measurement protocol in combination with patient characteristics in determining whether a patient is diagnosed with hypertension. Protocols that rely on different combinations of only 3 measures (R1-3) will classify more participants as hypertensive, compared to using 5 measures or disregarding a high R2.
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Affiliation(s)
- Hazem M Warda
- Alhyatt Heart and Vascular Center, Alexandria, Egypt.,Department of Cardiology, Faculty of Medicine, Tanta University Hospital, Tanta, Egypt
| | - Amany K Elshorbagy
- Department of Physiology, Faculty of Medicine, University of Alexandria, Alexandria, Egypt
| | - Amira Habib
- Alhyatt Heart and Vascular Center, Alexandria, Egypt
| | - Ahmed Wagdi
- Alhyatt Heart and Vascular Center, Alexandria, Egypt.,Institute of Cardiovascular Physiology, University Medical Center Goettingen, Goettingen, Germany
| | - Anastasia S Mihailidou
- Department of Cardiology and Kolling Institute, Royal North Shore Hospital, St Leonards, NSW, Australia.,Faculty of Medicine and Health Sciences, Macquarie University, Sydney, NSW, Australia
| | - Mamdouh Warda
- Alhyatt Heart and Vascular Center, Alexandria, Egypt.,Department of Cardiology, Faculty of Medicine, Tanta University Hospital, Tanta, Egypt
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18
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Lin YT, Salihovic S, Fall T, Hammar U, Ingelsson E, Ärnlöv J, Lind L, Sundström J. Global Plasma Metabolomics to Identify Potential Biomarkers of Blood Pressure Progression. Arterioscler Thromb Vasc Biol 2020; 40:e227-e237. [DOI: 10.1161/atvbaha.120.314356] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Objective:
The pathophysiology of hypertension remains incompletely understood. We investigated associations of circulating metabolites with longitudinal blood pressure (BP) changes in the Prospective Investigation of the Vasculature in Uppsala Seniors cohort and validated the findings in the Uppsala Longitudinal Study of Adult Men cohort.
Approach and Results:
Circulating metabolite levels were assessed with liquid- and gas-chromatography coupled to mass spectrometry among persons without BP-lowering medication at baseline. We studied associations of baseline levels of metabolites with changes in BP levels and the clinical BP stage between baseline and a follow-up examination 5 years later. In the discovery cohort, we investigated 504 individuals that contributed with 757 observations of paired BP measurements. The mean baseline systolic and diastolic BPs were 144 (19.7)/76 (9.7) mm Hg, and change in systolic and diastolic BPs were 3.7 (15.8)/−0.5 (8.6) mm Hg over 5 years. The metabolites associated with diastolic BP change were ceramide, triacylglycerol, total glycerolipids, oleic acid, and cholesterylester. No associations with longitudinal changes in systolic BP or BP stage were observed. Metabolites with similar structures to the 5 top findings in the discovery cohort were investigated in the validation cohort. Diacylglycerol (36:2) and monoacylglycerol (18:0), 2 glycerolipids, were associated with diastolic BP change in the validation cohort.
Conclusions:
Circulating baseline levels of ceramide, triacylglycerol, total glycerolipids, and oleic acid were positively associated with longitudinal diastolic BP change, whereas cholesterylester levels were inversely associated with longitudinal diastolic BP change. Two glycerolipids were validated in an independent cohort. These metabolites may point towards pathophysiological pathways of hypertension.
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Affiliation(s)
- Yi-Ting Lin
- From the Department of Medical Sciences, Uppsala University, Sweden (Y.-T.L., S.S., T.F., U.H., E.I., L.L., J.S.)
- Department of Family Medicine, Kaohsiung Medical University Hospital (Y.-T.L.), Kaohsiung Medical University, Taiwan
- Faculty of Medicine, College of Medicine (Y.-T.L.), Kaohsiung Medical University, Taiwan
| | - Samira Salihovic
- From the Department of Medical Sciences, Uppsala University, Sweden (Y.-T.L., S.S., T.F., U.H., E.I., L.L., J.S.)
- School of Medical Sciences (S.S.), Örebro University, Sweden
- School of Science and Technology (S.S.), Örebro University, Sweden
| | - Tove Fall
- From the Department of Medical Sciences, Uppsala University, Sweden (Y.-T.L., S.S., T.F., U.H., E.I., L.L., J.S.)
| | - Ulf Hammar
- From the Department of Medical Sciences, Uppsala University, Sweden (Y.-T.L., S.S., T.F., U.H., E.I., L.L., J.S.)
| | - Erik Ingelsson
- From the Department of Medical Sciences, Uppsala University, Sweden (Y.-T.L., S.S., T.F., U.H., E.I., L.L., J.S.)
- Division of Cardiovascular Medicine, Department of Medicine (E.I.), Stanford University School of Medicine, CA
- Stanford Cardiovascular Institute (E.I.), Stanford University School of Medicine, CA
- Stanford Diabetes Research Center (E.I.), Stanford University School of Medicine, CA
| | - Johan Ärnlöv
- Division of Family Medicine and Primary Care, Department of Neurobiology, Care Science and Society, Karolinska Institutet, Huddinge, Sweden (J.Ä.)
- School of Health and Social Studies, Dalarna University, Falun, Sweden (J.Ä.)
| | - Lars Lind
- From the Department of Medical Sciences, Uppsala University, Sweden (Y.-T.L., S.S., T.F., U.H., E.I., L.L., J.S.)
| | - Johan Sundström
- From the Department of Medical Sciences, Uppsala University, Sweden (Y.-T.L., S.S., T.F., U.H., E.I., L.L., J.S.)
- The George Institute for Global Health, University of New South Wales, Sydney, NSW, Australia (J.S.)
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19
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Wang N, Atkins ER, Salam A, Moore MN, Sharman JE, Rodgers A. Regression to the mean in home blood pressure: Analyses of the BP GUIDE study. J Clin Hypertens (Greenwich) 2020; 22:1184-1191. [PMID: 32634288 DOI: 10.1111/jch.13933] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 06/02/2020] [Accepted: 06/15/2020] [Indexed: 11/27/2022]
Abstract
The aim of our study was to estimate the size of regression to the mean with home blood pressure (BP) monitoring and compare with that for office BP. Office and home BP measures were obtained from the BP GUIDE (value of central Blood Pressure for GUIDing managEment for hypertension) study, in which 286 patients had BP measured every 3 months for 12 months. Patients were categorized by 10 mm Hg strata of baseline BP, and regression to the mean measures was calculated for home and office BP. High baseline home BP readings tended to be lower on long-term follow-up, and low baseline readings tended to be higher. For example, patients in the group with mean baseline home systolic BP ≥ 150 mm Hg had a mean baseline systolic BP of 156 mm Hg, which fell to 143 mm Hg at 12 months; and patients in the group with mean baseline home systolic BP < 120 mm Hg had a mean baseline systolic BP of 113 mm Hg which rose to 120 mm Hg at 12 months. Similar patterns were seen in intervention and control groups, and for diastolic BP. The regression dilution ratio for home systolic BP and diastolic BP was 0.52 and 0.64, respectively, compared to 0.40 and 0.55 for office systolic BP and diastolic BP, respectively. Home BP is subject to regression to the mean to a similar degree as office BP. These findings have implications for the diagnosis and management of hypertension using home BP.
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Affiliation(s)
- Nelson Wang
- The George Institute for Global Health Australia, UNSW Sydney, Sydney, NSW, Australia.,Sydney Medical School, University of Sydney, Sydney, NSW, Australia.,Department of Cardiology, Royal Prince Alfred Hospital, Sydney, NSW, Australia
| | - Emily R Atkins
- The George Institute for Global Health Australia, UNSW Sydney, Sydney, NSW, Australia.,Westmead Clinical School, University of Sydney, Sydney, NSW, Australia
| | - Abdul Salam
- The George Institute for Global Health India, Hyderabad, India
| | - Myles N Moore
- College of Health and Medicine, Menzies Institute for Medical Research, University of Tasmania, Hobart, Tas., Australia
| | - James E Sharman
- College of Health and Medicine, Menzies Institute for Medical Research, University of Tasmania, Hobart, Tas., Australia
| | - Anthony Rodgers
- The George Institute for Global Health Australia, UNSW Sydney, Sydney, NSW, Australia
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20
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Assari S, Boyce S, Bazargan M, Caldwell CH. Diminished Returns of Parental Education in Terms of Youth School Performance: Ruling out Regression toward the Mean. CHILDREN-BASEL 2020; 7:children7070074. [PMID: 32645933 PMCID: PMC7401872 DOI: 10.3390/children7070074] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 06/16/2020] [Accepted: 07/06/2020] [Indexed: 12/11/2022]
Abstract
Background: Minorities’ Diminished Returns (MDRs) refer to systemically weaker effects of socioeconomic status (SES) indicators on various developmental, behavioral, and health outcomes of ethnic minorities compared to non-Hispanic (non-Latino) Whites. Similar MDRs also exist for the effects of parental education on the school performance of ethnic minority youth. Aim: To assess whether regression toward the mean (RTM) has any role in explaining the diminished effects of parental education on the school performance of Black and Hispanic youth relative to non-Hispanic White youth. Materials and methods: Data for this cross-sectional study came from the Monitoring the Future survey (MTF, 2017), a nationally representative survey of American youth in 12th grade. The sample included 10,262 youth who were 12th graders (typically 17–18 years old). The independent variable was parental education with five categories: Some high school, High school graduate, Some college, College graduate, and Graduate school. The outcome was self-reported school performance measured as grade point average (GPA). Ethnicity was the effect modifier. Analysis of variance (ANOVA) and the Tukey Post Hoc test was used to analyze the data. Data visualization (line graphs) was used to visualize the shape of youth GPA as a function of parental education levels across ethnic groups. Results: While a perfect stepwise increase was seen in youth school performance as a result of parental education improvement, this pattern differed considerably across ethnic groups. Such a perfect stepwise increase in youth school performance as a result of the incremental increase in parental education was missing for Black and Hispanic youth. The shape of the association between parental education and youth school performance ruled out regression toward the mean (RTM) as an explanation for the observed diminished effects of parental education on the school performance of Black and Hispanic youth. Conclusion: Diminished returns of parental education on the school performance of Black and Hispanic youth cannot be explained by regression toward the mean. Other factors and contextual processes, such as segregation, discrimination, racism, and poor quality of schools in urban areas, should be investigated in future research.
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Affiliation(s)
- Shervin Assari
- Department of Family Medicine, Charles R. Drew University of Medicine and Science, Los Angeles, CA 90059, USA;
- Correspondence: ; Tel.: +(734)-232-0445; Fax: +734-615-8739
| | - Shanika Boyce
- Department of Pediatrics, Charles R. Drew University of Medicine and Science, Los Angeles, CA 90059, USA;
| | - Mohsen Bazargan
- Department of Family Medicine, Charles R. Drew University of Medicine and Science, Los Angeles, CA 90059, USA;
- Department of Family Medicine, UCLA Health, Los Angeles, CA 90095, USA
| | - Cleopatra H. Caldwell
- Department of Health Behavior and Health Education, University of Michigan, Ann Arbor, MI 48109, USA;
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21
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Nuredini G, Saunders A, Rajkumar C, Okorie M. Current status of white coat hypertension: where are we? Ther Adv Cardiovasc Dis 2020; 14:1753944720931637. [PMID: 32580646 PMCID: PMC7318827 DOI: 10.1177/1753944720931637] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
White coat hypertension (WCH) is characterised by an elevated clinic blood pressure (BP) with normal ambulatory or home BP. It is well recognised in clinical practice and occurs in approximately one-third of untreated patients with elevated clinic BP. Current evidence suggests that WCH is associated with cardiovascular risk factors, including the development of sustained hypertension and the presence of target organ damage. However, its effects on cardiovascular outcomes remain a matter of debate. There is also insufficient evidence from randomised controlled trials to determine whether WCH warrants treatment. This narrative review aims to provide an update on the current understanding of WCH. It focuses on the clinical characteristics and potential implications of WCH, its relationship to cardiovascular risk and the evidence regarding treatment. Gaps in existing research are also highlighted.
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Affiliation(s)
- Gani Nuredini
- Department of Medicine, Brighton and Sussex Medical School, Brighton, UK
| | - Alec Saunders
- Department of Medicine, Brighton and Sussex Medical School, Brighton, UK
| | - Chakravarthi Rajkumar
- Department of Medicine, Brighton and Sussex Medical School, Brighton, UK.,Division of Medicine, Brighton and Sussex University Hospitals, Brighton, UK
| | - Michael Okorie
- Department of Medicine, Brighton and Sussex Medical School, Watson Building (Room 344), Falmer, Brighton, BN1 9PH, UK.,Division of Medicine, Brighton and Sussex University Hospitals, Brighton, UK
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22
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Blood pressure measurement in atrial fibrillation: review and meta-analysis of evidence on accuracy and clinical relevance. J Hypertens 2020; 37:2430-2441. [PMID: 31408028 DOI: 10.1097/hjh.0000000000002201] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
: Atrial fibrillation (AF) often coexists with hypertension in the elderly and multiplies the risk of stroke and death. Blood pressure (BP) measurement in patients with AF is difficult and uncertain and has been a classic exclusion criterion in hypertension clinical trials leading to limited research data. This article reviews the evidence on the accuracy of BP measurement in AF performed using different methods (office, ambulatory, home) and devices (auscultatory, oscillometric) and its clinical relevance in predicting cardiovascular damage. The current evidence suggests the following: (i) Interobserver and intra-observer variation in auscultatory BP measurement is increased in AF because of increased beat-to-beat BP variability and triplicate measurement is required; (ii) Data from validation studies of automated electronic BP monitors in AF are limited and methodologically heterogeneous and suggest reasonable accuracy in measuring SBP and a small yet consistent overestimation of DBP; (iii) 24-h ambulatory BP monitoring is feasible in AF, with similar proportion of errors as in individuals without AF; (iv) both auscultatory and automated oscillometric BP measurements appear to be clinically relevant in AF, providing similar associations with intra-arterial BP measurements and with indices of preclinical cardiac damage as in patients without AF, and predict cardiovascular events and death; (v) Screening for AF in the elderly using an AF-specific algorithm during routine automated office, home or ambulatory BP measurement has high diagnostic accuracy. In conclusion, in AF patients, BP measurement is important, reliable, and clinically relevant and should not be neglected in clinical research and in practice.
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Assari S, Boyce S, Akhlaghipour G, Bazargan M, Caldwell CH. Reward Responsiveness in the Adolescent Brain Cognitive Development (ABCD) Study: African Americans' Diminished Returns of Parental Education. Brain Sci 2020; 10:E391. [PMID: 32575523 PMCID: PMC7349244 DOI: 10.3390/brainsci10060391] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 06/16/2020] [Accepted: 06/16/2020] [Indexed: 02/08/2023] Open
Abstract
(1) Background: Reward responsiveness (RR) is a risk factor for high-risk behaviors such as aggressive behaviors and early sexual initiation, which are all reported to be higher in African American and low socioeconomic status adolescents. At the same time, parental education is one of the main drivers of reward responsiveness among adolescents. It is still unknown if some of this racial and economic gap is attributed to weaker effects of parental education for African Americans, a pattern also called minorities' diminished returns (MDRs). (2) Aim: We compared non-Hispanic White and African American adolescents for the effects of parent education on adolescents RR, a psychological and cognitive construct that is closely associated with high-risk behaviors such as the use of drugs, alcohol, and tobacco. (3) Methods: This was a cross-sectional analysis that included 7072 adolescents from the adolescent brain cognitive development (ABCD) study. The independent variable was parent education. The main outcome as adolescents' RR measured by the behavioral inhibition system (BIS) and behavioral activation system (BAS) measure. (4) Results: In the overall sample, high parent education was associated with lower levels of RR. In the overall sample, we found a statistically significant interaction between race and parent education on adolescents' RR. The observed statistical interaction term suggested that high parent education is associated with a weaker effect on RR for African American than non-Hispanic White adolescents. In race-stratified models, high parent education was only associated with lower RR for non-Hispanic White but not African American adolescents. (5) Conclusion: Parent education reduces RR for non-Hispanic White but not African American adolescents. To minimize the racial gap in brain development and risk-taking behaviors, we need to address societal barriers that diminish the returns of parent education and resources in African American families. We need public and social policies that target structural and societal barriers, such as the unequal distribution of opportunities and resources. To meet such an aim, we need to reduce the negative effects of social stratification, segregation, racism, and discrimination in the daily lives of African American parents and families. Through an approach like this, African American families and parents can effectively mobilize their resources and utilize their human capital to secure the best possible tangible outcomes for their adolescents.
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Affiliation(s)
- Shervin Assari
- Department of Family Medicine, Charles R Drew University of Medicine and Science, Los Angeles, CA 90059, USA;
| | - Shanika Boyce
- Department of Pediatrics, Charles R Drew University of Medicine and Science, Los Angeles, CA 90059, USA;
| | - Golnoush Akhlaghipour
- Department of Neurology, University of California Los Angeles, Los Angeles, CA 90095, USA;
| | - Mohsen Bazargan
- Department of Family Medicine, Charles R Drew University of Medicine and Science, Los Angeles, CA 90059, USA;
- Department of Family Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA
| | - Cleopatra H. Caldwell
- Center for Research on Ethnicity, Culture, and Health (CRECH), School of Public Health, University of Michigan, Ann Arbor, MI 48104, USA;
- Department of Health Behavior and Health Education, School of Public Health, University of Michigan, Ann Arbor, MI 48104, USA
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24
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Blood pressure control and complex health conditions in older adults: impact of recent hypertension management guidelines. J Hum Hypertens 2020; 35:280-289. [PMID: 32346124 DOI: 10.1038/s41371-020-0334-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 03/24/2020] [Accepted: 03/25/2020] [Indexed: 11/08/2022]
Abstract
The American College of Cardiology and the American Heart Association (ACC/AHA) 2017 guidelines for hypertension management lowered blood pressure (BP) thresholds to 130/80 mmHg to define hypertension while the European Society of Cardiology and the European Society of Hypertension (ESC/ESH) 2018 guidelines retained 140/90 mmHg. Both guidelines recommend adapting management for older patients with complex health conditions, without however clear indications on how to adapt. Our aims were to assess the impact of lowering BP thresholds on the prevalence of elevated BP and BP control, as well as the proportion of participants with a complex health condition across these BP categories. We used data from 3210 participants in the Lausanne cohort Lc65+ aged between 67 and 80 years. Hypertension diagnosis and antihypertensive medication use were self-reported. BP was measured three times at one visit. Some 51% of participants reported having hypertension and 44% reported taking antihypertensive medication. Compared with ESC/ESH thresholds, the prevalence of measured elevated BP was 24% percentage points higher and BP control was 24% percentage points lower using ACC/AHA thresholds. About one out of two participants with elevated BP and four out of five participants with uncontrolled BP had a complex health condition, i.e., frailty, multimorbidity, or polypharmacy. To comply with ACC/AHA guidelines, considerable effort would be required to reach BP control. This is a serious challenge because a large share of hypertensive older adults has complex health conditions, a type of patients for whom there is no strong evidence on how to manage hypertension.
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26
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Abstract
PURPOSE OF REVIEW To focus on the missing link between accuracy and precision of monitoring devices and effective implementation of therapeutic strategies. RECENT FINDINGS Haemodynamic monitoring is generally considered to be an essential part of intensive care medicine. However, randomized controlled trials fail to demonstrate improved outcome unequivocally as a result of hemodynamic monitoring. This absence of solid proof renders doctors to hesitance to apply haemodynamic monitoring in clinical practise. Profound understanding of the underlying mechanisms, adequate patient selection and timing, meaningful representation and software-supported interpretation of data all play an important role. Furthermore, protocol adherence and human behaviour seem to form the often missing link between a solid physiologic principle and clinically relevant outcome. Introduction of haemodynamic monitoring should therefore not be limited to theoretical and practical issues, but also involve integration strategies. By learning from others, we might be able to implement haemodynamic monitoring in such a way that it has potential to modify the course of a disease. SUMMARY The clinical success of haemodynamic monitoring goes far beyond accuracy and precision of monitoring devices. Understanding of the factors influencing the effective implementation of therapeutic strategies plays an important role in the meaningful introduction of haemodynamic monitoring.
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Thomas DM, Clark N, Turner D, Siu C, Halliday TM, Hannon BA, Kahathuduwa CN, Kroeger CM, Zoh R, Allison DB. Best (but oft-forgotten) practices: identifying and accounting for regression to the mean in nutrition and obesity research. Am J Clin Nutr 2020; 111:256-265. [PMID: 31552422 PMCID: PMC6997628 DOI: 10.1093/ajcn/nqz196] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 07/23/2019] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Regression to the mean (RTM) is a statistical phenomenon where initial measurements of a variable in a nonrandom sample at the extreme ends of a distribution tend to be closer to the mean upon a second measurement. Unfortunately, failing to account for the effects of RTM can lead to incorrect conclusions on the observed mean difference between the 2 repeated measurements in a nonrandom sample that is preferentially selected for deviating from the population mean of the measured variable in a particular direction. Study designs that are susceptible to misattributing RTM as intervention effects have been prevalent in nutrition and obesity research. This field often conducts secondary analyses of existing intervention data or evaluates intervention effects in those most at risk (i.e., those with observations at the extreme ends of a distribution). OBJECTIVES To provide best practices to avoid unsubstantiated conclusions as a result of ignoring RTM in nutrition and obesity research. METHODS We outlined best practices for identifying whether RTM is likely to be leading to biased inferences, using a flowchart that is available as a web-based app at https://dustyturner.shinyapps.io/DecisionTreeMeanRegression/. We also provided multiple methods to quantify the degree of RTM. RESULTS Investigators can adjust analyses to include the RTM effect, thereby plausibly removing its biasing influence on estimating the true intervention effect. CONCLUSIONS The identification of RTM and implementation of proper statistical practices will help advance the field by improving scientific rigor and the accuracy of conclusions. This trial was registered at clinicaltrials.gov as NCT00427193.
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Affiliation(s)
- Diana M Thomas
- Department of Mathematical Sciences, US Military Academy, West Point, NY, USA,Address correspondence to DMT (e-mail: )
| | - Nicholas Clark
- Department of Mathematical Sciences, US Military Academy, West Point, NY, USA
| | - Dusty Turner
- Department of Mathematical Sciences, US Military Academy, West Point, NY, USA
| | - Cynthia Siu
- Department of Data Science, COS and Associates Ltd., Hong Kong, China
| | - Tanya M Halliday
- Department of Health, Kinesiology, and Recreation, University of Utah, Salt Lake City, UT, USA
| | - Bridget A Hannon
- Division of Nutritional Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Chanaka N Kahathuduwa
- Department of Human Development and Family Studies, Texas Tech University, Lubbock, TX, USA
| | - Cynthia M Kroeger
- Charles Perkins Centre, School of Pharmacy, Faculty of Medicine and Health, University of Sydney, Sydney, Australia,Department of Epidemiology and Biostatistics, Indiana University School of Public Health-Bloomington, Bloomington, IN, USA
| | - Roger Zoh
- School of Public Health, Indiana University, Bloomington, IN, USA
| | - David B Allison
- Department of Epidemiology and Biostatistics, Indiana University School of Public Health-Bloomington, Bloomington, IN, USA
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28
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Abstract
: The hypertension paradigm has contributed to a dramatic reduction in CVD mortality. This has been achieved by applying average results of population studies to identify a target population and design a common intervention to achieve a BP goal. Progressive lowering of the BP threshold has expanded the fraction of persons at risk who have access to treatment. Meanwhile, falling risk reduces potential benefit, while treatment-induced adverse events increase - making further expansion of the treatment pool no longer tenable. Still, CVD remains the leading cause of death. Fortunately, new science reveals opportunities to enhance CVD prevention when BP management is based upon individual characteristics. Treatment can be directed at those most likely to benefit, while sparing others the hazards of unnecessary therapy. Treatment can be designed to achieve a variety of physiological objectives that influence cardiovascular outcomes. This new strategy should improve both the efficacy and efficiency of BP-related CVD prevention.
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Effects of blood pressure lowering on cardiovascular events, in the context of regression to the mean: a systematic review of randomized trials. J Hypertens 2020; 37:16-23. [PMID: 30499920 DOI: 10.1097/hjh.0000000000001994] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVE To assess the clinical relevance of regression to the mean for clinical trials and clinical practice. METHODS MEDLINE was searched until February 2018 for randomized trials of BP lowering with over 1000 patient-years follow-up per group. We estimated baseline mean BP, follow-up mean (usual) BP amongst patients grouped by 10 mmHg strata of baseline BP, and assessed effects of BP lowering on coronary heart disease (CHD) and stroke according to these BP levels. RESULTS Eighty-six trials (349 488 participants), with mean follow-up of 3.7 years, were included. Most mean BP change was because of regression to the mean rather than treatment. At high baseline BP levels, even after rigorous hypertension diagnosis, downwards regression to the mean caused much of the fall in BP. At low baseline BP levels, upwards regression to the mean increased BP levels, even in treatment groups. Overall, a BP reduction of 6/3 mmHg lowered CHD by 14% (95% CI 11-17%) and stroke by 18% (15-22%), and these treatment effects occurred at follow-up BP levels much closer to the mean than baseline BP levels. In particular, more evidence was available in the SBP 130-139 mmHg range than any other range. Benefits were apparent in numerous high-risk patient groups with baseline mean SBP less than 140 mmHg. CONCLUSION Clinical practice should focus less on pretreatment BP levels, which rarely predict future untreated BP levels or rule out capacity to benefit from BP lowering in high cardiovascular risk patients. Instead, focus should be on prompt, empirical treatment to maintain lower BP for those with high BP and/or high risk.
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30
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Messerli FH, Rexhaj E. Of headwind and tailwind, regression to the mean and Wilder's principle. J Hypertens 2018; 37:4-5. [PMID: 30499915 DOI: 10.1097/hjh.0000000000002010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- Franz H Messerli
- Department of Cardiology, University Hospital Bern, and Department for Biomedical Research, University of Bern, Bern, Switzerland.,Mount Sinai Medical Center, New York, New York, USA.,Jagiellonian University, Krakow, Poland
| | - Emrush Rexhaj
- Department of Cardiology, University Hospital Bern, and Department for Biomedical Research, University of Bern, Bern, Switzerland
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