Ambulatory blood pressure and cardiovascular events in chronic kidney disease

Area of Science:

• Nephrology
• Cardiology
• Hypertension Management

Background:

• Hypertension is a major risk factor for cardiovascular and renal complications, especially in patients with chronic kidney disease (CKD).
• Clinic blood pressure (BP) measurements may not accurately reflect a patient's overall BP status and cardiovascular risk.
• Accurate BP monitoring is crucial for managing hypertension and preventing adverse outcomes in CKD.

Purpose of the Study:

• To compare the prognostic value of clinic BP measurements versus out-of-clinic BP measurements for cardiovascular and renal injury and outcomes in CKD patients.
• To evaluate the role of ambulatory BP monitoring (ABPM) in risk stratification and treatment guidance for hypertensive CKD patients.
• To define optimal BP targets for CKD patients using ABPM.

Main Methods:

• Review of accumulating data comparing clinic BP with ambulatory BP monitoring (ABPM) for predicting cardiovascular and renal outcomes.
• Analysis of ABPM's ability to detect white-coat hypertension and masked hypertension.
• Examination of the association between BP dipping patterns and renal function/outcomes.

Main Results:

• ABPM is a superior prognostic marker for cardiovascular and renal injury compared to clinic BP measurements.
• ABPM accurately identifies white-coat and masked hypertension, reducing misclassification.
• Specific ABPM targets for non-dialysis CKD patients include 24-hour <125/75 mm Hg, daytime <130/85 mm Hg, and nighttime <110/70 mm Hg.

Conclusions:

• ABPM refines cardiovascular and renal risk assessment across all stages of CKD.
• ABPM guides more aggressive treatment for masked hypertension and de-escalation for white-coat hypertension.
• While nondipping is linked to adverse outcomes, its independent prognostic significance requires further clarification.