Dataset Information

Central Blood Pressure and Cardiovascular Outcomes in Chronic Kidney Disease.

ABSTRACT: BACKGROUND AND OBJECTIVES:Central BP measurements provide noninvasive measurement of aortic BP; our objectives were to examine the association of central and brachial BP measurements with risk of cardiovascular outcomes and mortality in patients with CKD and to determine the role of central BP measurement in conjunction with brachial BP in estimating cardiovascular risk. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS:In a prospective, longitudinal study (the Chronic Renal Insufficiency Cohort), central BP was measured in participants with CKD using the SphygmoCorPVx System. Cox proportional hazards models were used for analyses. RESULTS:Mean age of the participants (n=2875) was 60 years old. After a median follow-up of 5.5 years, participants in the highest quartile of brachial systolic BP (?138 mm Hg) were at higher risk for the composite cardiovascular outcome (hazard ratio, 1.59; 95% confidence interval, 1.17 to 2.17; c statistic, 0.76) but not all-cause mortality (hazard ratio, 1.28; 95% confidence interval, 0.90 to 1.80) compared with those in the lowest quartile. Participants in the highest quartile of central systolic BP were also at higher risk for the composite cardiovascular outcome (hazard ratio, 1.69; 95% confidence interval, 1.24 to 2.31; c statistic, 0.76) compared with participants in the lowest quartile. CONCLUSIONS:We show that elevated brachial and central BP measurements are both associated with higher risk of cardiovascular disease outcomes in patients with CKD. Measurement of central BP does not improve the ability to predict cardiovascular disease outcomes or mortality in patients with CKD compared with brachial BP measurement.

SUBMITTER: Rahman M

PROVIDER: S-EPMC5969462 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature

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Central Blood Pressure and Cardiovascular Outcomes in Chronic Kidney Disease.

Rahman Mahboob M Hsu Jesse Yenchih JY Desai Niraj N Hsu Chi-Yuan CY Anderson Amanda H AH Appel Lawrence J LJ Chen Jing J Cohen Debbie L DL Drawz Paul E PE He Jiang J Qiang Pan P Ricardo Ana C AC Steigerwalt Susan S Weir Matthew R MR Wright Jackson T JT Zhang Xiaoming X Townsend Raymond R RR

Clinical journal of the American Society of Nephrology : CJASN 20180223 4

<h4>Background and objectives</h4>Central BP measurements provide noninvasive measurement of aortic BP; our objectives were to examine the association of central and brachial BP measurements with risk of cardiovascular outcomes and mortality in patients with CKD and to determine the role of central BP measurement in conjunction with brachial BP in estimating cardiovascular risk.<h4>Design, setting, participants, & measurements</h4>In a prospective, longitudinal study (the Chronic Renal Insuffici ...[more]

PMID: 29475992

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Project description:To characterize the distribution of blood pressure (BP), prevalence, and risk factors for hypertension in pediatric chronic kidney disease, we conducted a cross-sectional analysis of baseline BPs in 432 children (mean age 11 years; 60% male; mean glomerular filtration rate 44 mL/min per 1.73 m(2)) enrolled in the Chronic Kidney Disease in Children cohort study. BPs were obtained using an aneroid sphygmomanometer. Glomerular filtration rate was measured by iohexol disappearance. Elevated BP was defined as BP >or=90th percentile for age, gender, and height. Hypertension was defined as BP >or=95th percentile or as self-reported hypertension plus current treatment with antihypertensive medications. For systolic BP, 14% were hypertensive and 11% were prehypertensive (BP 90th to 95th percentile); 68% of subjects with elevated systolic BP were taking antihypertensive medications. For diastolic BP, 14% were hypertensive and 9% were prehypertensive; 53% of subjects with elevated diastolic BP were taking antihypertensive medications. Fifty-four percent of subjects had either systolic or diastolic BP >or=95th percentile or a history of hypertension plus current antihypertensive use. Characteristics associated with elevated BP included black race, shorter duration of chronic kidney disease, absence of antihypertensive medication use, and elevated serum potassium. Among subjects receiving antihypertensive treatment, uncontrolled BP was associated with male sex, shorter chronic kidney disease duration, and absence of angiotensin-converting enzyme inhibitor or angiotensin receptor blocker use. Thirty-seven percent of children with chronic kidney disease had either elevated systolic or diastolic BP, and 39% of these were not receiving antihypertensives, indicating that hypertension in pediatric chronic kidney disease may be frequently under- or even untreated. Treatment with angiotensin-converting enzyme inhibitors or angiotensin receptor blockers may improve BP control in these patients.

Project description:AimsThis study aimed to assess the effect of blood pressure (BP) index, in terms of level and variability, on the progression of cardiovascular and renal diseases in patients with both heart failure (HF) and chronic kidney disease (CKD).Methods and resultsThe study involved patients with HF and CKD from the database of the Chronic Renal Insufficiency Cohort (CRIC) study. The study endpoint includes the following: (i) primary endpoint, including cardiovascular disease (CVD) events, renal events, and all-cause death; (ii) CVD events; (iii) renal events; and (iv) all-cause death. Among 3939 participants in the CRIC study, a total of 382 patients were included. The duration of the follow-up was 6.3 ± 2.7 years, the age was 60.2 ± 8.9 years, and 57.6% were male. BP index included 20 indicators in relation to BP level and variability, 4 of which were analysed including baseline systolic BP (SBP), standard deviation of SBP, coefficient of variation of diastolic BP (DBP CV), and average real variability of pulse pressure. In the Cox regression analysis after adjustment, baseline SBP was significant for the risk of primary endpoint [hazard ratio (HR) 1.22, 95% confidence interval (CI) 1.03-1.44, P = 0.02] and renal events (HR 1.54, 95% CI 1.22-1.95, P < 0.001), and DBP CV was significant for the risk of primary endpoint (HR 1.03, 95% CI 1.01-1.06, P = 0.02) and CVD events (HR 1.04, 95% CI 1.02-1.07, P < 0.01). The result of the forest plot depicted that baseline SBP had a linear association with the risk of CVD and renal events (P = 0.04 and 0.001, respectively) and DBP CV with CVD events (P = 0.02). As the restricted cubic spline models displayed, DBP CV featured a J- or L-curved association with the primary endpoint, renal events, and all-cause death (P for nonlinearity = 0.01, <0.001, and 0.01, respectively).ConclusionsThe baseline SBP and DBP CV may remain significant for clinical outcomes in patients with both HF and CKD. The increase in baseline SBP is associated with a higher risk of primary endpoint, CVD events, and renal events, and the increase in DBP CV with a higher risk of CVD events. Concerning nonlinear association, DBP CV features a J- or L-curved relationship with the primary endpoint, renal events, and all-cause death, with a higher risk at both low and high values.Trial registrationhttps://www.Clinicaltrialsgov; unique identifier: NCT00304148.

Project description:Background and objectivesIn patients with CKD, elevated plasma parathyroid hormone (PTH) levels are associated with greater cardiovascular morbidity and mortality. However, the reference method for PTH measurement is disputed. It has been argued that measurement of nonoxidized PTH better reflects biologically active PTH than measurements with conventional assays.Design, setting, participants, & measurementsPTH and nonoxidized PTH levels were measured at study baseline in 535 patients with CKD with an eGFR range between 89 and 15 ml/min per 1.73 m2. Patients were followed over 5.1 years for the occurrence of acute heart failure, atherosclerotic events, CKD progression (doubling of serum creatinine or initiation of RRT), or all-cause death.ResultsAtherosclerotic events, acute heart failure, CKD progression, and deaths from any cause occurred in 116, 58, 73, and 85 patients, respectively. In Kaplan-Meier analyses, patients at the highest PTH and nonoxidized-PTH tertile (79-543 and 12-172 pg/ml, respectively) showed a higher rate of atherosclerotic events, acute heart failure, CKD progression, and death from any cause. After adjustment for eGFR and albuminuria, nonoxidized PTH was no longer associated with atherosclerotic events (hazard ratio third versus first tertile, 1.04 [95% confidence intervals, 0.62-1.75]), acute heart failure (hazard ratio third versus first tertile, 1.24 [95% confidence intervals, 0.59-2.62]), CKD progression (hazard ratio third versus first tertile, 0.93 [95% confidence intervals, 0.46-1.90]), and death from any cause (hazard ratio third versus first tertile, 1.23 [95% confidence intervals, 0.66-2.31]), and PTH lost its association with atherosclerotic events (hazard ratio third versus first tertile, 0.80 [95% confidence intervals, 0.46-1.38]) and CKD progression (hazard ratio third versus first tertile, 0.99 [95% confidence intervals, 0.46-2.10]), although it remained associated with acute heart failure (hazard ratio third versus first tertile, 2.76 [95% confidence intervals, 1.11-6.89]) and all-cause death (hazard ratio third versus first tertile, 2.35 [95% confidence intervals, 1.13-4.89]). After further adjustment for cardiovascular and kidney risk factors, PTH remained associated with all-cause death (hazard ratio third versus first tertile, 2.79 [95% confidence intervals, 1.32-5.89]), but with no other end point.ConclusionsIn a cohort of patients with CKD, PTH was associated with all-cause mortality; there was no association of nonoxidized PTH with any of the clinical outcomes examined.

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Central Blood Pressure and Cardiovascular Outcomes in Chronic Kidney Disease.

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Central Blood Pressure and Cardiovascular Outcomes in Chronic Kidney Disease.

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