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Twenty-four hour ambulatory blood pressure for the management of antihypertensive treatment: a randomized controlled trial

Journal of Human Hypertension volume 23, pages 122–129 (2009)Cite this article

Abstract

The aim of this study was to assess whether the use of 24-h blood pressure (BP) measurement in the management of antihypertensive therapy improves BP in patients with sustained hypertension. Patients with sustained hypertension (office BP ⩾140/90 mm Hg, and 24-h systolic BP ⩾130/80 mm Hg) were randomly assigned to a strategy using 24-h BP to manage antihypertensive treatment (target <130/80 mm Hg) or to a standard strategy using office BP (target <140/90 mm Hg). The primary end point was change in 24-h systolic BP at 1 year of follow-up. We included 136 patients in the primary analysis. After 1 year of follow-up, the change in 24-h systolic BP was significantly greater in the ambulatory BP group compared with the office BP group (mean difference (95% confidence interval) −3.6 (−7.0, −0.3), P=0.03). Intention-to-treat analysis revealed essentially unchanged results. The mean number of antihypertensive drugs per participant at 1 year of follow-up was 1.76±1.1 and 1.95±0.9 in the ambulatory and office BP group, respectively (P=0.049). The benefit of ambulatory BP monitoring was mainly seen in patients with previously known hypertension (mean difference −7.2 (−11.6, −2.8), P=0.002), but not in those with newly detected hypertension (mean difference 0.2 (−4.9, 5.4), P=0.93). In conclusion, using 24-h BP for the management of antihypertensive therapy in patients with sustained hypertension leads to a greater BP reduction compared with a standard treatment strategy using office BP, although fewer antihypertensive drugs were used in the ambulatory BP group.

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Acknowledgements

We thank Dr Robert J Glynn for statistical advice. This study was supported by unrestricted grants from Bayer Pharma, Zurich, Switzerland and Boehringer-Ingelheim, Basel, Switzerland. NCT00139984 (http://www.clinicaltrials.gov/ct/show/NCT00139984). David Conen was supported by grants from the Swiss National Science Foundation (PASMA 118586/1), the Janggen-Poehn Foundation, St Gallen, Switzerland and the Stiftung für Gesundheit und kardio-/neurovaskuläre Forschung, Basel, Switzerland.

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Authors and Affiliations

  1. Department of Cardiology, University Hospital, Basel, Switzerland

    D Conen

  2. Division of Preventive Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA

    D Conen

  3. Institute of Primary Care, University Hospital, Basel, Switzerland

    P Tschudi & B Martina

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  1. D Conen
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Correspondence to D Conen.

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David Conen and Peter Tschudi have no financial disclosures. Benedict Martina has served as a consultant to Boehringer-Ingelheim and has received honoraria from Boehringer-Ingelheim, Novartis and Merck Sharp & Dohme.

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Conen, D., Tschudi, P. & Martina, B. Twenty-four hour ambulatory blood pressure for the management of antihypertensive treatment: a randomized controlled trial. J Hum Hypertens 23, 122–129 (2009). https://doi.org/10.1038/jhh.2008.106

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