The effect of hypertension on renal vasculature and structure

2015 ◽  
Author(s):  
Ulrich Wenzel ◽  
Thorsten Wiech ◽  
Udo Helmchen
Keyword(s):  
Blood Pressure ◽  
Great Increase ◽  
Vascular Lesions ◽  
Blood Vessel Wall ◽  
Renal Vasculature ◽  
Experimental Conditions ◽  
Humoral Factors ◽  
Hypertensive Nephrosclerosis ◽  
Stage Renal Disease ◽  
End Stage

The concept of hypertensive nephrosclerosis was introduced by Volhard and Fahr in 1914 and has been extensively used in the literature since then, but its existence is controversial. While it is indisputable that malignant hypertension is a cause of end-stage renal disease (ESRD), there remains controversy as to whether the so-called benign nephrosclerosis can also lead to ESRD.Pressure, if it is great enough, will eventually disrupt any structure. Obviously, this is also true of blood pressure. It is therefore not surprising that an experimentally induced great increase in pressure disrupts the integrity of the blood-vessel wall. Such vascular lesions may be caused or at least influenced by several factors: humoral factors such as angiotensin II, catecholamines, mineralocorticoids, and vasopressin may increase vascular permeability, thereby damaging the vessel walls independently of, or superimposed upon, elevated blood pressure.Nephrosclerosis (literally, hardening of the kidney, Greek derivation: nephros, kidney; sclerosis, hardening) refers to diseases with predominant pathological changes occurring in the pre-glomerular vasculature and secondary changes involving the glomeruli and interstitium. Therefore, it is appropriate to describe first those vascular lesions, which, at least under defined experimental conditions, are believed to be caused solely by the presence of hypertension.

P0155CHARACTERISTICS OF HYPERTENSIVE NEPHROSCLEROSIS DIAGNOSED BY RENAL BIOPSY BASED ON 40-YEAR EXPERIENCE

2020 ◽  
Vol 35 (Supplement_3) ◽  
Author(s):  
Hea Eun Kim ◽  
HO JUN CHIN
Keyword(s):  
Risk Factors ◽  
Blood Pressure ◽  
Serum Creatinine ◽  
Renal Biopsy ◽  
End Stage Renal Disease ◽  
Hypertensive Nephrosclerosis ◽  
Hypertensive Patients ◽  
Blood Pressures ◽  
Stage Renal Disease ◽  
End Stage

Abstract Background and Aims Hypertensive nephrosclerosis (HT-N) is known as the second common cause of end stage renal disease (ESRD) in Korea as well as in other countries. However, the HT-N is assumed by clinical findings which are not well correlated to the pathologic findings. Therefore, we report the clinical characteristics of HT-N diagnosed by renal biopsy and compare the prognosis between patients with HT-N and hypertensive patients with focal segmental nephrosclerosis (FSGS) without pathologic HT-N. Method We enrolled 21,617 patients having native kidney biopsy for diagnosis of nephritis between 1979 and 2018, retrospectively. Among them, we selected 267 adult hypertensive patients with only HT-N and 984 hypertensive patients with FSGS without HT-N or other diagnoses (FSGS-HT). The estimated glomerular filtration rate (GFR) was calculated by original MDRD equation. The final outcomes were incidences of end stage renal disease (ESRD) and death. We matched blood pressures and GFR between two groups and analyzed the difference of outcomes within the matched cohort (mHT-N and mFSGS-HTN), also. Results The age of patients with HT-N was 49.5 ± 15.3 years at renal biopsy. There were 175 (65.5 %) men. Systolic blood pressure (SBP) was 139.1 ± 24.0 mmHg and diastolic blood pressure (DBP) was 83.7 ± 15.6 mmHg at renal biopsy. Levels of serum creatinine, GFR, and urine protein to creatinine ratio were 3.17 ± 3.05 mg/dl, 40.7 ± 32.5 ml/min/1.73 m2, and 2.277 ± 2.803 g/g cr, respectively. During follow-up period of 64.1 months (median), there were 52 (22.7%) patients progressed to ESRD and 8 (3.1%) patients were dead. Age, SBP, and hemoglobin were risk factors to mortality by Cox’s hazard proportional model adjusted with related factors to mortality. With increase of 10 mmHg in the level of SBP at renal biopsy, hazard ratio(HR) of mortality was increase by 1.645 folds (95% CI: 1.192-2.270, P=0.002). Presence of diabetes mellitus, serum albumin, and GFR were risk factors to incident ESRD. Compared to patients with FSGS-HT, patients with HT-N showed higher levels of SBP, DBP, and serum creatinine and lower levels of GFR, serum albumin, hemoglobin, and UPCR (all p-values <0.05), however, the risk of incident ESRD and mortality was not different. Therefore, we matched BP and GFR between groups and selected 235 patients in each group. The matched groups were not different in the values of age, SBP, DBP, and GFR. The risk of mortality was not different between groups (p-value =0.502), however, HR of incident ESRD was 1.558-fold higher (95% CI: 1.004-2.419, P=0.048) in mFSGS-HT compared to mHT-N by Cox’s hazard proportional model adjusted by factors related to ESRD. Conclusion Hypertensive nephrosclerosis was diagnosed in more advanced stage of CKD compared to hypertensive FSGS. Considering levels of GFR and SBP as risk factors to hard outcomes, we should consider early pathologic diagnosis for proteinuric and/or azotemic hypertensive patients and control blood pressures and renal dysfunction in more aggressive manners.

scholarly journals Effects of Variability in Blood Pressure, Glucose, and Cholesterol Concentrations, and Body Mass Index on End-Stage Renal Disease in the General Population of Korea

2019 ◽  
Vol 8 (5) ◽  
pp. 755 ◽  
Author(s):  
Mee Kyoung Kim ◽  
Kyungdo Han ◽  
Hun-Sung Kim ◽  
Yong-Moon Park ◽  
Hyuk-Sang Kwon ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Body Mass Index ◽  
General Population ◽  
Renal Disease ◽  
End Stage Renal Disease ◽  
High Variability ◽  
Metabolic Parameters ◽  
Metabolic Parameter ◽  
Stage Renal Disease ◽  
End Stage

Aim: Metabolic parameters, such as blood pressure, glucose, lipid levels, and body weight, can interact with each other, and this clustering of metabolic risk factors is related to the progression to end-stage renal disease (ESRD). The effect of variability in metabolic parameters on the risk of ESRD has not been studied previously. Methods: Using nationally representative data from the Korean National Health Insurance System, 8,199,135 participants who had undergone three or more health examinations between 2005 and 2012 were included in this analysis. Intraindividual variability in systolic blood pressure (SBP), fasting blood glucose (FBG), total cholesterol (TC), and body mass index (BMI) was assessed by examining the coefficient of variation, variability independent of the mean, and average real variability. High variability was defined as the highest quartile of variability and low variability was defined as the lower three quartiles of variability. Results: Over a median (5–95%) of 7.1 (6.5–7.5) years of follow-up after the variability assessment period, 13,600 (1.7/1000 person-years) participants developed ESRD. For each metabolic parameter, an incrementally higher risk of ESRD was observed for higher variability quartiles compared with the lowest quartile. The risk of ESRD was 46% higher in the highest quartile of SBP variability, 47% higher in the highest quartile of FBG variability, 56% higher in the highest quartile of BMI variability, and 108% higher in the highest quartile of TC variability. Compared with the group with low variability for all four parameters, the group with high variability for all four parameters had a significantly higher risk for incident ESRD (hazard ratio (HR) 4.12; 95% CI 3.72–4.57). Conclusions: Variability in each metabolic parameter was an independent predictor of the development of ESRD among the general population. There was a composite effect of the variability in additional metabolic parameters on the risk of ESRD.

scholarly journals RELATIONSHIP BETWEEN INTERDIALYTIC WEIGHT GAIN AND PRE HEMODIALYSIS BLOOD PRESSURE IN HEMODIALYSIS PATIENTS

2020 ◽  
pp. 169-171
Author(s):  
M Manasa ◽  
Aravind Reddy. Gangula
Keyword(s):  
Blood Pressure ◽  
Weight Gain ◽  
Water Retention ◽  
Salt Intake ◽  
Hemodialysis Patients ◽  
Interdialytic Weight Gain ◽  
Stage Renal Disease ◽  
End Stage ◽  
The Relationship ◽  
Esrd Patients

Interdialytic weight gain in patients with hemodialysis depends on fluid, salt intake in interdialytic period and compliance of dialysis patients. In end stage renal disease(ESRD) patients due to decreased and absent residual urine output there is salt and water retention in body which leads to interdialytic weight gain. Overhydration and IDWG is assumed to be the main cause of pre hemodialysis raised blood pressure(BP) in ESRD patients. Here the relationship between IDWG and pre HD blood pressure is studied in 40 hemodialysis patients. We recorded pre HD BP and IDWG in four subsequent hemodialysis sessions for each patient during the period of 2 weeks in patients who are on twice weekly hemodialysis. so, in total we studied 160 hemodialysis sessions. Mean of four pre HD BP is compared with mean of four IDWG for each patient. Then correlation between 40 mean IDWG and 40 mean pre HD BP is studied and also correlation between IDWG and pre HD blood pressure during 160 hemodidlysis sessions studied individually.

The Potential Role of Catheter-Based Renal Sympathetic Denervation in Chronic and End-Stage Kidney Disease

2016 ◽  
Vol 21 (4) ◽  
pp. 344-352 ◽  
Author(s):  
Yusuke Sata ◽  
Markus P. Schlaich
Keyword(s):  
Blood Pressure ◽  
Renal Function ◽  
Kidney Disease ◽  
End Stage Renal Disease ◽  
Renal Denervation ◽  
Potential Role ◽  
Stage Renal Disease ◽  
End Stage ◽  
Renal Sympathetic

Sympathetic activation is a hallmark of chronic and end-stage renal disease and adversely affects cardiovascular prognosis. Hypertension is present in the vast majority of these patients and plays a key role in the progressive deterioration of renal function and the high rate of cardiovascular events in this patient cohort. Augmentation of renin release, tubular sodium reabsorption, and renal vascular resistance are direct consequences of efferent renal sympathetic nerve stimulation and the major components of neural regulation of renal function. Renal afferent nerve activity directly influences sympathetic outflow to the kidneys and other highly innervated organs involved in blood pressure control via hypothalamic integration. Renal denervation of the kidney has been shown to reduce blood pressure in many experimental models of hypertension. Targeting the renal nerves directly may therefore be specifically useful in patients with chronic and end-stage renal disease. In this review, we will discuss the potential role of catheter-based renal denervation in patients with impaired kidney function and also reflect on the potential impact on other cardiovascular conditions commonly associated with chronic kidney disease such as heart failure and arrhythmias.

Abstract 498: Increased Blood Pressure Variability and Baroreflex Impairment in Patients With End-stage Renal Disease Undergoing Hemodialysis

Hypertension ◽  
2013 ◽  
Vol 62 (suppl_1) ◽  
Author(s):  
Kátia B Scapini ◽  
Valéria C Hong ◽  
Janaína B Ferreira ◽  
Sílvia B Souza ◽  
Naomi V Ferreira ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Renal Disease ◽  
End Stage Renal Disease ◽  
Blood Pressure Variability ◽  
Baroreflex Sensitivity ◽  
Low Frequency ◽  
Stage Renal Disease ◽  
End Stage ◽  
Esrd Patients ◽  
Alpha Index

Background: Patients with end-stage renal disease (ESRD) undergoing hemodialysis are susceptible to the development of autonomic dysfunction, which is associated with an increased risk of sudden death. Experimental and clinical evidence suggest a crucial role of autonomic dysfunction for both, the progression of renal disease and for the high rate of cardiovascular events in these patients. In the present study, we evaluated the heart rate variability (HRV), the blood pressure variability (BPV) and the baroreflex sensitivity (BRS) in ESRD patients undergoing hemodialysis and normal controls. Methods: Nine ESRD patients undergoing hemodialysis (mean age 53.4±10.2 years, 4 male) and nine age-matched healthy controls (mean age 52.8±10.2 years, 4 male) were assessed. Non−invasive curves of blood pressure (BP) were recorded continuously (Finometer ®) for 10 minutes, at rest, in the supine position. The heart rate variability (HRV) and systolic blood pressure variability (BPV) were estimated in the time and frequency domain (spectral analysis). The BRS was quantified by alpha index. Statistical analyzes were performed by Student's t test and the results were expressed as mean ± standard deviation. Results: ESRD patients presented lower HRV in time domain than healthy controls (SDNN: 25.8±10.7 vs. 44.6±11.7 ms, p<0.01; VAR NN: 768.3±607.4 vs. 2113.9±1261.6 ms 2 , p=0.01). All frequency domain analyzed indexes, i.e., total power (361.9±297.0 vs. 1227.2±696.3 ms 2 , p<0.01), high-frequency (181.8±128.7 vs. 358.7±179.8 ms 2 , p=0.047), low-frequency (55.1±44.2 vs. 444.6±389.9 ms 2 , p=0.02) and very-low-frequency (72.5±75.1 vs. 279.2±119.5 ms 2 , p<0.01) of HRV were lower in ESRD patients. The BPV was higher in ESRD patients when compared to controls (VAR PAS: 98.4±72.0 vs. 35.4±21.4 ms 2 , p=0.03) and BRS was lower in ESRD patients (alpha index: 4.34±3.05 vs. 7.56±2.50 ms/mmHg, p<0.02). Conclusion: ESRD patients undergoing hemodialysis presents reduced HRV, increase in BPV and reduced baroreflex sensitivity. These impairments may be associated with mortality in ESRD.

Medical management of nephropathy in type I diabetes mellitus: current recommendations.

1995 ◽  
Vol 6 (6) ◽  
pp. 1523-1529
Author(s):  
J A Breyer
Keyword(s):  
Blood Pressure ◽  
Renal Function ◽  
Diabetic Nephropathy ◽  
Blood Sugar ◽  
Dietary Protein ◽  
End Stage Renal Disease ◽  
Insulin Dependent ◽  
Rate Of Decline ◽  
Stage Renal Disease ◽  
End Stage

Diabetic nephropathy is the single most common cause of end-stage renal disease in the United States. Recently, several major therapeutic interventions have been developed and demonstrated to slow or halt the progression of renal failure in patients with diabetes and diabetic kidney disease. The Diabetes Control and Complications Trial demonstrated that microalbuminuria developed in fewer patients in the intensive blood sugar control group than in the conventional therapy group. Similarly, the risk of developing proteinuria was reduced by intensive blood sugar control. Multiple studies have demonstrated that in patients with insulin-dependent diabetes and proteinuria, lowering the systemic blood pressure slows the rate of decline in renal function and improves patients' survival. In the recently completed trial of ACE inhibition in diabetic nephropathy, ACE inhibitors were specifically shown to decrease dramatically the risk of doubling of serum creatinine or reaching a combined outcome of end-stage renal disease or death. In studies in small numbers of patients with insulin-dependent diabetes and established diabetic nephropathy, dietary protein restriction has also been demonstrated to slow the rate of decline of renal function. New potential interventions currently undergoing study include the use of aldose reductase inhibitors, the use of drugs that prevent the formation of advanced glycosylation end-products, and the use of angiotensin II receptor antagonists. Thus, several established benefits have recently been demonstrated to help prevent the development of or slow the progression of diabetic nephropathy, including blood pressure control, blood sugar control, and treatment with ACE inhibitors. Dietary protein restriction may also be of benefit. Multiple new interventions are undergoing clinical trials currently.

Relationship Between Volume Status and Blood Pressure in Children with End Stage Renal Disease on Chronic Hemodialysis

2007 ◽  
Vol 7 (2) ◽  
pp. 210-215
Author(s):  
Fatina I. Fadel ◽  
Samar M. Sabry ◽  
Azza M.O. Abdel Rahm ◽  
Emad Eldin E. Salama ◽  
Marwa M. El-Sonbaty
Keyword(s):  
Blood Pressure ◽  
Renal Disease ◽  
End Stage Renal Disease ◽  
Chronic Hemodialysis ◽  
Volume Status ◽  
Stage Renal Disease ◽  
End Stage

P5731Optimal blood pressure in diabetic hypertensive patients with overt proteinuria

2019 ◽  
Vol 40 (Supplement_1) ◽  
Author(s):  
C J Lee ◽  
J Hwang ◽  
C Y Kang ◽  
H Kim ◽  
J Ha ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Diabetic Nephropathy ◽  
Lower Risk ◽  
Propensity Scores ◽  
Renal Outcome ◽  
Health Examination ◽  
Hypertensive Patients ◽  
Overt Proteinuria ◽  
Stage Renal Disease ◽  
End Stage

Abstract Background Evidence for the benefit of intensive blood pressure lowering in diabetic nephropathy is not clear at this time. The objective of this study was to demonstrate whether lower mean blood pressure (BP) in treated hypertensive patients with diabetic nephropathy is associated with better prognosis. Methods From the National Health Insurance Service (NHIS) Health Examination Database, diabetic hypertensive subjects with proteinuria between 2009 and 2010 were selected and followed-up until 2015 (N=8,663). Mean of the recorded systolic and diastolic BP during follow-up health examinations were stratified into five categories (SBP: <120, 120 to <130, 130 to <140, 140 to <150, and ≥150 mmHg; DBP: <70, 70 to <80, 80 to <90, 90 to <100, and ≥100 mmHg). All-cause death, myocardial infarction (MI), stroke, and renal outcome (progression to end stage renal disease or doubling of serum creatinine) were examined by Cox proportional hazard models with the propensity scores adjusted method. Results Compared to SBP of 130 to <140 mmHg, SBP of 120 to <130 mmHg was associated with lower risk of all-cause death (HR=0.78; 95% CI, 0.64–0.95), stroke (HR: 0.65; 95% CI, 0.45–0.94), and renal outcome (HR: 0.81; 95% CI, 0.68–0.97). SBP of <120 mmHg was associated with benefit for renal outcomes (HR: 0.69; 95% CI 0.55–0.88) but not with elevated risk of other outcomes. Compared to DBP of 80 to <90 mmHg, DBP of 70 to <80 mmHg were associated with lower risk of all-cause death (HR: 0.75; 95% CI, 0.64–0.88) but with higher risk of MI (HR: 1.52; 95% CI, 1.05–2.21). DBP of <70 mmHg was associated with reduced risk of all-cause death (HR: 0.79; 95% CI, 0.64–0.98). Conclusion In diabetic hypertensive subjects with overt proteinuria, deterioration of renal function decreased with decreasing SBP and the lowest risk of all-cause death and stroke were observed in SBP <130 mmHg. Low DBP was associated with low risk of all-cause death but there was a J curve phenomenon for MI in DBP of 70 to <80 mmHg.

Sign in / Sign up

Export Citation Format

Share Document