Abstract
Background
Increase in blood pressure (BP) variability (BPV) is associated with cardiovascular events, target organ damage, and arterial stiffness in adults. We previously reported that 24-h BPV may be associated with arterial stiffness and underlie white-coat hypertension (WCH). In this study, we examined whether visit-to-visit variability (VVV) could predict WCH and whether VVV correlated with eGFR, eGFR slope, and albuminuria/proteinuria in children and adolescents with renal diseases.
Methods
VVV was determined as average real variability of office BP measurements between visits, and 24-h BPV as the standard deviation of 24-h ambulatory BP. In 35 renal patients (25 boys and 10 girls, 7–18 years of age), divided into normotension (NT), WCH, and hypertension (HTN), the relationships between VVV and 24-h BPV and VVV in each BP category were studied. In separate 48 renal patients (24 boys and 24 girls, 2–18 years of age), the correlation between VVV and eGFR, eGFR slope, urine albumin or protein excretion was examined.
Results
Systolic VVV was significantly correlated with systolic office BP index. There was no correlation between VVV and 24-h BPV or 24-h pulse pressure. In addition, VVV was not different among NT, WCH, and HTN. Systolic VVV was significantly negatively correlated with eGFR but not with eGFR slope, albuminuria, or proteinuria. A cut-off value of systolic VVV for detecting eGFR < 60 ml/min per 1.73 m2 was 8.5.
Conclusion
VVV could not predict WCH. Systolic VVV correlated with eGFR but not with eGFR slope, albuminuria/proteinuria. Increased VVV could be a marker of decreased eGFR.
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Abbreviations
- ABP:
-
Ambulatory blood pressure
- ARV:
-
Average real variability
- ABPM:
-
Ambulatory blood pressure monitoring
- BP:
-
Blood pressure
- BPV:
-
Blood pressure variability
- HTN:
-
Hypertension
- NT:
-
Normotension
- ROC:
-
Receiver operating characteristic
- TOD:
-
Target organ damage
- WCH:
-
White-coat hypertension
- VVV:
-
Visit-to-visit variability
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Fujita, H., Matsuoka, S. & Awazu, M. Visit-to-visit blood pressure variability in children and adolescents with renal disease. Clin Exp Nephrol 22, 1150–1156 (2018). https://doi.org/10.1007/s10157-018-1557-3
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DOI: https://doi.org/10.1007/s10157-018-1557-3