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Office blood pressure underestimates ambulatory blood pressure in peripheral arterial disease in comparison to healthy controls

Journal of Human Hypertension volume 18, pages 193–200 (2004)Cite this article

Abstract

Patients with peripheral arterial disease (PAD) constitute a subgroup of high-risk hypertensives, but controlled studies on 24-h blood pressure (BP) and diurnal variation of BP are lacking. This study was performed in order to test the hypothesis that office BP (OBP) may underestimate 24-h BP in PAD patients in comparison to a matched control group. In all, 98 male patients (mean age 68 years) with a history of intermittent claudication and an ankle/brachial index less than 0.9, and 94 controls matched for age but without PAD or ischaemic heart disease performed 24-h recordings of ambulatory BP. A total of 59 patients had a history of hypertension and 69 were on treatment with BP-lowering drugs as compared to 17 and 23 of the control subjects, respectively. Office as well as 24-h systolic BP (SBP) were higher in patients as compared to controls (151±22 vs 140±20 mmHg, P<0.001 and 142±14 vs 133±15 mmHg, P<0.001, respectively), but did not differ with regard to diastolic BP. In an analysis of covariance with the continuous factors age, office SBP and the categorical factor antihypertensive treatment, 24-h SBP was higher in PAD patients compared to controls (P<0.05). The difference between office and night SBP was lower in PAD patients with antihypertensive treatment compared to controls (P=0.01). In conclusion, Male patients with PAD had higher systolic but not diastolic BP than age-matched control subjects. In PAD patients, 24-h SBP was higher than expected from OBP compared to controls. Night SBP was higher only in patients with antihypertensive treatment. In PAD patients, especially when on antihypertensive treatment, the severity of hypertension may be underestimated when based on OBP only.

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Acknowledgements

We thank Anette Aly (RN), Linda Nilsson (BMA) and Eva Wallen (BMA) for skilful technical assistance, and Elisabeth Berg and Ulf Brodin for expert statistical advice. The study was supported by grants from the Swedish Heart–Lung Foundation, Karolinska Institutet and the Serafimer Hospital Foundation.

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Authors and Affiliations

  1. Department of Cardiology, Karolinska Hospital, Sweden

    P Svensson & U de Faire

  2. Division of Cardiovascular Epidemiology, Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden

    U de Faire

  3. Department of Clinical Physiology, Karolinska Hospital, Sweden

    U Niklasson

  4. Department of Medicine, Division of Emergency Medicine, Karolinska Hospital, Sweden

    J Östergren

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  1. P Svensson
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  2. U de Faire
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  3. U Niklasson
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  4. J Östergren
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Correspondence to P Svensson.

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Svensson, P., de Faire, U., Niklasson, U. et al. Office blood pressure underestimates ambulatory blood pressure in peripheral arterial disease in comparison to healthy controls. J Hum Hypertens 18, 193–200 (2004). https://doi.org/10.1038/sj.jhh.1001649

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