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Altered circadian blood pressure profile in patients with active acromegaly. Relationship with left ventricular mass and hormonal values

Journal of Human Hypertension volume 15, pages 601–605 (2001)Cite this article

Abstract

To determine the relationships between the circadian blood pressure profile and left ventricular mass, hormonal pattern and insulin sensitivity indices in patients with active acromegaly, ambulatory 24-h blood pressure monitoring (ABPM) was recorded in 25 subjects (47.0 ± 15.1 years, range 23–72). Serum growth hormone (GH) and insulin-like growth factor-1, fasting and mean plasma glucose and insulin during oral glucose tolerance test (OGTT), insulinogenic index, the sum of the plasma insulin levels and the homeostasis model insulin resistance index (Homa’s index) were determined. Left ventricular mass index (LVMI) was calculated from two-dimensional guided M-mode echocardiogram. The prevalence of hypertension was 56% (n = 14) and 40% (n = 10) according to sphygmomanometric measurements and ABPM, respectively. Non-dipping profile was observed in six of 10 hypertensives and in six of 15 normotensives. Serum growth hormone, fasting glucose, the area under the serum insulin curve and LVMI were higher for acromegalics with non-dipping profile than for dippers (all of them, P < 0.05). In non-dippers daytime heart rate was higher than night time (P < 0.001). In conclusion, the main observations in the present study suggested that both normotensive and hypertensive acromegalics had a highly prevalent non-dipping profile with a preserved circadian pattern of heart rate, that was associated with higher levels of serum GH. The disturbance in nocturnal blood fall in normotensives was associated with a decreased insulin sensitivity. The role of GH in blood pressure circadian rhythm regulation in essential hypertension deserves further studies.

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Authors and Affiliations

  1. Hypertension Program, Hospital de Clinicas San Martin Buenos Aires Schools of Medicine and Biochemistry, and Instituto Universitario de Ciencias de la Salud School of Medicine (Barcelo Foundation), Buenos Aires, Argentina

    DJ Pietrobelli, M Akopian, AO Olivieri, A Renauld, D Garrido, R Artese & CA Feldstein

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  1. DJ Pietrobelli
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  2. M Akopian
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  3. AO Olivieri
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  4. A Renauld
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  5. D Garrido
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  6. R Artese
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  7. CA Feldstein
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Correspondence to CA Feldstein.

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Pietrobelli, D., Akopian, M., Olivieri, A. et al. Altered circadian blood pressure profile in patients with active acromegaly. Relationship with left ventricular mass and hormonal values. J Hum Hypertens 15, 601–605 (2001). https://doi.org/10.1038/sj.jhh.1001239

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