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"Arterial’naya Gipertenziya" ("Arterial Hypertension")

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Renal excretion of water and electrolytes and plasma monovalent cations in hypertensive patients under psychoemotional stress

https://doi.org/10.18705/1607-419X-2012-18-5-406-411

Abstract

Изменение водо- и ионовыделительной функции почки и физико-химического состояния одновалентных катионов плазмы крови у больных гипертонической болезнью при психоэмоциональной нагрузке Dynamics of water and ion renal excretion and physicochemical monovalent cations in hypertensive patients under psychoemotional stress I.E. Ganelina, N.A. Kruchinina, M.N. Maslova, A.A. Panov, E.E. Poroshin Object. To study the influence of psychoemotional stress (PES) on renal mechanisms blood pressure regulation and on the activity of plasma Na+ and K+ in hypertensive patients. Design and methods. Eighteen males with normal blood pressure and 20 males with hypertension (mean age in both groups - 57 ± 3 years) underwent PES [1], and all of them developed the rise in blood pressure, increased diuresis, natriuresis, renal excretion of K+, osm, clearance of Na-CNa and osm–Cosm. We assessed the levels of Na+ and K+ in the flame photometer Flafo-40 (Germany), we performed osm-cryoscopy on the thermoelectric milliosmometre (MT-1) to assess the activity of Na+ and K+ in plasma with the use of ion-selective electrodes ISE-M-K and ISE- M-Na. Results. After PES, SAP and DAP reduced in normotensive and hypertensive patients, however, it was about 12 % remaining above the initial level in both groups. After PES, normotensive subjects increased kidney excretion compared to the initial level: diuresis for 15 %, , U NaV for 15 %, UКV for 18 %, U osmV for 14 %, C for 17 %, Cosm for 15 %, i.e. their reabsorption remained low. After PES diuresis, renal excretion of ions, CNa, Cosm are decreased in comparison to baseline level: diuresis, U NaV; U osmV, CNа, Cosm were higher for 1-1,3 %. The baseline levels of Na+ and K+ activity and their activity coefficients were higher in patients in comparison with healthy subjects for 12 %, and the activity coefficient of K+ was decreased at PES for 9 %. Conclusion. After PES reabsorption of water, Na+, CNa, Cosm is decreased in normotensive subjects, while in hypertensive patients it significantly increases, despite high blood pressure. The high activity of Na+, and its activity coefficient in patients with hypertension may be associated with a decrease in the proportion of free water in blood plasma.

About the Authors

I. E. Ganelina
Sechenov Institute of Evolutionary Physiology and Biochemistry of the Russian Academy of Sciences
Russian Federation


N. A. Kruchinina
Central Research Institute named after A.N. Krylov
Russian Federation


M. N. Maslova
Sechenov Institute of Evolutionary Physiology and Biochemistry of the Russian Academy of Sciences
Russian Federation


A. A. Panov
Sechenov Institute of Evolutionary Physiology and Biochemistry of the Russian Academy of Sciences
Russian Federation


E. E. Poroshin
Federal State Unitary Enterprise «A.P. Karpinsky Russian Geological Research Institute»
Russian Federation


References

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Review

For citations:


Ganelina I.E., Kruchinina N.A., Maslova M.N., Panov A.A., Poroshin E.E. Renal excretion of water and electrolytes and plasma monovalent cations in hypertensive patients under psychoemotional stress. "Arterial’naya Gipertenziya" ("Arterial Hypertension"). 2012;18(5):406-411. (In Russ.) https://doi.org/10.18705/1607-419X-2012-18-5-406-411

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ISSN 1607-419X (Print)
ISSN 2411-8524 (Online)