Uncontrolled Hypertension is Associated with Postprandial Hypotension

José Alfie, Jessica Barochiner, Myriam Nuñez, Paula E. Cuffaro, Marcos J. Marín, Marcelo A. Rada, Margarita S. Morales, Lucas S. Aparicio, Carlos R. Galarza, Gabriel D. Waisman

Abstract


Background: In a previous study that incorporated post-lunch measurements to the conventional scheme of home-based bloodpressure monitoring, we detected postprandial hypotension in about a quarter of hypertensive patients. The coexistence ofhypertension with hypotension poses a therapeutic dilemma, suggesting that the control of hypertension might attenuatepostprandial hypotension.Objectives: The aim of this study was to compare the postprandial change of systolic blood pressure, and the correspondingchronotropic response, associated to the control of hypertension.Methods: We prospectively evaluated 140 treated hypertensive patients, aged over 40 years, with home-based blood pressuremonitoring. The control of hypertension was based on the average morning and evening blood pressure, considering 135/85mmHg as cutoff value. Postprandial hypotension was defined as a drop in systolic blood pressure equal to or greater than 20mmHg with respect to the preprandial value in at least one of three lunches.Results: Postprandial hypotension was found in 13.2% (n=10) of patients with controlled hypertension and in 42.2% (n=27)with uncontrolled hypertension (p<0.001). After lunch, the average decrease of systolic blood pressure was 9.5±10.5 mmHg(6.4%±7.8%) in patients with uncontrolled hypertension and 3.2±7.8 mmHg (2.6%±6.5%) in those with controlled hypertension(p<0.001), with no significant difference in the chronotropic response. After stratifying the patients by hypertension control, the postprandial response of heart rate and systolic blood pressure showed a significant inverse correlation in controlledhypertensive patients (r=-0.24; p=0.035), and a not significant correlation in uncontrolled patients. On the multiplelinear regression analysis, lack of blood pressure control (beta=0.26, p=0.002) and female gender (beta=0.22; p<0.001) weresignificant predictors of a postprandial drop in systolic blood pressure, without a significant influence of age or number ofantihypertensive drugs.Conclusion: Lack of blood pressure control was associated with an abnormal postprandial circulatory response that predisposesto hypotension.

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Revista argentina de cardiología. ISSN en línea 1850-3748. Argentine journal of cardiology (English ed. Online ISSN 2314-2286) Sociedad Argentina de Cardiología. Azcuénaga 980 (C1115AAD),Ciudad Autónoma de Buenos Aires, República Argentina. Tel. (54 11) 4961-6027/8/9 Fax: 4961-6020 www.sac.org.ar revista@sac.org.ar