Abstract
Although hypertension is a risk factor for cardiovascular (CVD) events in stage B heart failure (HF), data on the prognostic value of home blood pressure (BP) measurements in stage B HF are limited. We retrospectively analyzed the cases of 568 patients with stage B HF and at least one cardiovascular risk factor who underwent home BP monitoring. Stage B HF was defined as BNP ≥ 35 pg/mL or NT-proBNP ≥125 pg/mL, Troponin T > 0.014 ng/mL, LVEF < 50%, enlarged left ventricular dimensions in diastole (men: ≥60 mm; women: ≥54 mm), enlarged left atrium (men: >40 mm; women: >38 mm), or increased left ventricular mass (men: >115 g/m2; women: >95 g/m2). Office hypertension was defined as systolic BP ≥ 140 mmHg. Home BP was measured in the morning, evening, and nighttime; morning/evening home hypertension was defined as ≥135 mmHg and nighttime home hypertension as ≥120 mmHg. During a mean follow-up of 7.8 ± 3.6 years, 66 CVD events occurred. An unadjusted Cox regression model gave the following hazard ratios (HRs) and 95% confidence intervals (CIs) for CVD-events risk in patients with office, morning, evening, and nighttime home hypertension: HR 1.69 (95% CI 1.03–2.78), 1.73 (1.02–2.95), 1.44 (0.89–2.33) and 2.33 (1.34–4.04), respectively. In a multivariate Cox regression analysis adjusting for significant variables, the association with CVD events remained only for nighttime home hypertension (HR 1.89; 95% CI 1.06–3.38), not other hypertension types. In conclusion, hypertension defined based on nighttime home BP was associated with CVD-events risk in stage B HF patients.

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Acknowledgements
We greatly appreciate the study investigators at each of the study sites who participated in the J-HOP study.
Funding
This study was financially supported in part by a grant from the 21st Century Center of Excellence Project run by Japan’s Ministry of Education, Culture, Sports, Science, and Technology (MEXT); a grant from the Foundation for Development of the Community (Tochigi); a grant from Omron Healthcare Co., Ltd; a Grant-in-Aid for Scientific Research (B; 21390247) from The Ministry of Education, Culture, Sports, Science, and Technology of Japan, 2009–2013; and funds from the MEXT-supported program for the Strategic Research Foundation at Private Universities, 2011–2015 Cooperative Basic and Clinical Research on Circadian Medicine (S1101022) to K. Kario. Funding sponsors had no role in forming study design and conducting of the study; the collection, management, analysis, and interpretation of the data; the preparation of the article; and decision to submit the paper for publication.
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T.K.: none. S.H.: none, K. Kario has received research grants from Omron Healthcare Co., Ltd., A&D Co., Ltd., and Fukuda Denshi Co., Ltd.
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Komori, T., Hoshide, S. & Kario, K. The prognostic impact of home blood pressure measurements in patients with stage B heart failure. Hypertens Res 48, 1779–1786 (2025). https://doi.org/10.1038/s41440-025-02174-3
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DOI: https://doi.org/10.1038/s41440-025-02174-3
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