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Hypertension in end-stage renal disease
1Directorate of Renal Medicine, Hope Hospital, Salford Royal Hospitals NHS Trust, Salford, United Kingdom.
Summary
Hypertension is common in chronic renal failure, accelerating disease and cardiovascular risk. While low blood pressure may paradoxically link to mortality in end-stage renal disease, rising blood pressure is detrimental, especially pulse pressure.
Area of Science:
- Nephrology
- Cardiology
- Hypertension Research
Background:
- Chronic renal failure affects 1 in 10 US adults, often linked with hypertension.
- Hypertension is nearly universal in end-stage renal disease (ESRD), posing significant cardiovascular risk.
- Observational studies show a counterintuitive association between low blood pressure and increased mortality in ESRD patients, possibly due to reverse causality.
Purpose of the Study:
- To review the complex relationship between blood pressure and outcomes in chronic renal failure and end-stage renal disease.
- To highlight the detrimental effects of rising blood pressure, particularly pulse pressure, on cardiovascular health in dialysis patients.
- To emphasize the lack of large-scale randomized controlled trials investigating hypertension management in dialysis patients.
Main Methods:
- Review of recent observational studies and existing literature on hypertension in chronic renal failure and ESRD.
- Analysis of associations between blood pressure parameters (systolic, diastolic, pulse pressure) and mortality and cardiovascular outcomes.
- Discussion of challenges in interpreting observational data, including reverse causality and confounding factors like age and comorbidity.
Main Results:
- Rising blood pressure, especially wide pulse pressure, is associated with adverse outcomes like left ventricular hypertrophy, ischemic heart disease, and heart failure in ESRD.
- High pulse pressure is a marker for shorter survival in dialysis patients, though disentangling this from comorbidities is difficult.
- Despite the clear link between hypertension and poor outcomes, no large randomized trials have addressed hypertension management strategies in dialysis patients.
Conclusions:
- Hypertension remains a critical, yet inadequately addressed, issue in chronic renal failure and ESRD.
- Pulse pressure is a significant, potentially modifiable, risk factor in dialysis patients.
- Urgent need for large-scale randomized controlled trials to guide effective hypertension treatment strategies in this vulnerable population.