Impact of blood pressure variability on mortality risk of patients with ANCA-associated vasculitis

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ID: 331594
2026
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Abstract
Abstract Objectives Antineutrophil cytoplasmic antibody–associated vasculitis (AAV) is associated with increased cardiovascular risk, related to persistent inflammation and endothelial dysfunction. Long -term systolic BP variability (SBPV), reflecting vascular damage, may predict outcomes better than mean BP. We investigated the impact of BP control and visit-to-visit BP variability (VVV), on all-cause mortality in AAV patients during maintenance therapy. Methods We retrospectively studied 95 AAV patients followed at three Italian nephrology centers. SBPV was defined as the standard deviation (SD) of ≥4 systolic BP measurements within 12 months from the first SBPV assessment. Patients were stratified by SBPV tertiles. The primary outcome was all-cause mortality. Results Over a median follow-up of 78 months, 14 patients (14.7%) died. Deceased patients were older and had higher PP and VVV. Hypertension prevalence increased across SBPV tertiles (35%, 62%, 69%; p = 0.02). Mortality rose from 6% in the lowest to 34.5% in the highest SBPV tertile (Fisher’s exact, p = 0.001). Time-averaged systolic BP was not associated with mortality. Conversely, each 5-mmHg increase in SBPV was associated with a twofold higher risk of death (HR 2.03, 95% CI 1.29–3.20; p = 0.002). SBPV remained significantly associated with outcome after full multivariable adjustment, including age, sex, myeloperoxidase (MPO) positivity, eGFR, PP, and proteinuria (adjusted HR 8.06 per 1 mmHg, 95% CI 1.42-45.54; p = 0.02). Conclusion In AAV patients, increased VVV was associated with all-cause mortality outperforming mean systolic BP. Further research is needed to confirm the impact of variable blood pressure on patient outcomes in AAV.
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Authors Elisabetta Bussalino, Elisa Russo, Lucia Macciò, Marta Donati, Federica Mescia, Marta Calatroni, Martina Tedesco, Gabriella Luisa Moroni, Federico Alberici, Francesca Viazzi, Pasquale B. Esposito
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Journal clinical kidney journal
Year 2026
DOI
10.1093/ckj/sfag356
URL
https://doi.org/10.1093/ckj/sfag356
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