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Ramirez, A.J.; Parati, G.; Castiglioni, P.; Consalvo, D.; Solís, P.; Risk, M.R.; Waissman, P.; di Rienzo, M.; Mancia, G.; Sanchez, R.A. "Elderly hypertensive patients: Silent white matter lesions, blood pressure variability, baroreflex impairment and cognitive deterioration" (2011) Current Hypertension Reviews. 7(2):80-87
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Abstract:

Introduction: Hypertension may increase the risk for stroke and is frequently associated with subcortical and periventricular white matter lesions (WML). This is considered a prognostic factor for the development of stroke and cognitive impairment, particularly in attention processes. Additionally, in elderly subjects, it is known the implications of alterations in the neural cardiovascular regulation and the cardiovascular risk. Aims: To evaluate, in asymptomatic elderly hypertensives, the association of ambulatory blood pressure values and autonomic activity with neurocognitive impairment and WML. In addition, we also evaluated the role of the autonomic nervous system particularly the vagal component, in the pathogenesis of white matter lesions. Methods: We studied 22 elderly essential hypertensive patients (69±1.1y) and as control group, 16 normotensive elderly subjects (age 67±3.2y) were also enrolled. To each one of them, a cerebral MRI was performed to classify them, by a neuro-radiologist blinded of the subject clinical status, using a 0 to 9 scale where 0 denoted no WML and 9 the most severe lesions. Twenty four hours arterial blood pressure monitoring was performed to each one of the subjects under study. Office blood pressure was measured 3 times and the mean value reported. Beat to beat finger arterial pressure monitoring (Finapres) was performed for a 2h period. During the first hour the patient remained lying supine in a quiet darkened room and during the second hour four manoeuvres: stand-up, cold pressor test, handgrip and quiet activity were randomly performed. Mean blood pressure and pulse interval values, from the two periods, and their respective variabilities, baroreflex sensitivity and power spectral analysis were calculated. Regarding neuropsychological assessment: Minimental test, attention evaluation, RAVLT, visual memory, language and executive function, geriatric depression scale, cognitive deficit rate tests were performed in all subject. Results: We found a closer correlation of WML with 24hs ABPM than with office BP readings being more evident with systolic blood pressure during the night time period. WML failed to show any correlation with SBP average values derived from the Finapres recordings in either the supine or the upright position, while it was positively and significantly related to PP in both conditions. However, beat to beat SBP variability, either in the supine or in the upright position, showed a positive and significant correlation with WML. During the resting period, BRS calculated through the sequence method (Time Domain) was similar in HT and NT subjects. However when BRS was assessed in the frequency domain a significant reduction was observed in HT compared with NT. In addition, At the time of laboratory manoeuvres implying sympathetic activation, BRS was significantly reduced as compared to the resting values being particularly evident for the HF values. In hypertensive subjects, only semantic fluency showed a significant difference (p=0.01), when compared to normotensives. When the patients were divided in older and younger than 75 years, a significant difference was observed in the delayed analysis of words, and in the phonological fluency showing a significant higher rate of pathological results in the group of patients older than 75 years. Conclusions: As previously shown, incidental WML, suggestive of silent cerebrovascular disease, is a frequent finding in elderly hypertensives. Night-time BP mean values and SBP variability in upright position seems to be the best predictor on silent cerebral WML. The vagal component of the autonomic nervous system seems to be involved in the pathogenesis of these lesions. Finally, the neurocognitive alterations are multifactorial in origin where the aging process seems to be the principal component. © 2011 Bentham Science Publishers.

Registro:

Documento: Artículo
Título:Elderly hypertensive patients: Silent white matter lesions, blood pressure variability, baroreflex impairment and cognitive deterioration
Autor:Ramirez, A.J.; Parati, G.; Castiglioni, P.; Consalvo, D.; Solís, P.; Risk, M.R.; Waissman, P.; di Rienzo, M.; Mancia, G.; Sanchez, R.A.
Filiación:Instituto de Cardiología y Cirugía Cardiovascular (ICYCC), Fundación Favaloro, Buenos Aires, Argentina
Centro de Derivacion de Epilepsia, Division Neurologia, Hospital Ramos Mejia, Argentina
Departamento de Cómputación y CONICET, Facultad de Ciencias Exáctas y Naturales, UBA, Argentina
Division and Department of Internal Medicine at the San Gerardo Hospital, Department of the Clinical Medicine and Prevention at the University of Milan-Bicocca, Italy
Centro di BioIngegneria, Fondazione Don Gnocchi, Milano, Italy
Palabras clave:Autonomic function; Elderly subjects; Essential hypertension; Variability and barorreflex control; White matter lesion; aged; article; autonomic nervous system; blood pressure variability; brain damage; cognitive defect; controlled study; essential hypertension; female; geriatric patient; human; major clinical study; male; nuclear magnetic resonance imaging; pathogenesis; pressoreceptor reflex; priority journal; systolic blood pressure; white matter
Año:2011
Volumen:7
Número:2
Página de inicio:80
Página de fin:87
Título revista:Current Hypertension Reviews
Título revista abreviado:Curr. Hypertens. Rev.
ISSN:15734021
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15734021_v7_n2_p80_Ramirez

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Citas:

---------- APA ----------
Ramirez, A.J., Parati, G., Castiglioni, P., Consalvo, D., Solís, P., Risk, M.R., Waissman, P.,..., Sanchez, R.A. (2011) . Elderly hypertensive patients: Silent white matter lesions, blood pressure variability, baroreflex impairment and cognitive deterioration. Current Hypertension Reviews, 7(2), 80-87.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15734021_v7_n2_p80_Ramirez [ ]
---------- CHICAGO ----------
Ramirez, A.J., Parati, G., Castiglioni, P., Consalvo, D., Solís, P., Risk, M.R., et al. "Elderly hypertensive patients: Silent white matter lesions, blood pressure variability, baroreflex impairment and cognitive deterioration" . Current Hypertension Reviews 7, no. 2 (2011) : 80-87.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15734021_v7_n2_p80_Ramirez [ ]
---------- MLA ----------
Ramirez, A.J., Parati, G., Castiglioni, P., Consalvo, D., Solís, P., Risk, M.R., et al. "Elderly hypertensive patients: Silent white matter lesions, blood pressure variability, baroreflex impairment and cognitive deterioration" . Current Hypertension Reviews, vol. 7, no. 2, 2011, pp. 80-87.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15734021_v7_n2_p80_Ramirez [ ]
---------- VANCOUVER ----------
Ramirez, A.J., Parati, G., Castiglioni, P., Consalvo, D., Solís, P., Risk, M.R., et al. Elderly hypertensive patients: Silent white matter lesions, blood pressure variability, baroreflex impairment and cognitive deterioration. Curr. Hypertens. Rev. 2011;7(2):80-87.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15734021_v7_n2_p80_Ramirez [ ]