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The association between systolic blood pressure and positional changes of the main renal venous blood flow

https://doi.org/10.18705/1607-419X-2015-21-5-477-486

Abstract

Objective. To assess the impact of the position-dependent changes of the main renal venous blood flow on systolic blood pressure (SBP).

Design and methods. We measured blood pressure, blood flow in the renal veins, and resistance index in patients with pathological kidney mobility (PKM). Based on the difference between the maximum and minimum velocity of renal venous blood flow several groups were identified, namely, groups with normal venous blood flow, with borderline and severe alterations of venous outflow. Based on the sum of the rotation angles (according to the excretory urogram and ultrasonography wedge and tilt test in three planes), patients were divided into three groups: I rotation degree — sum of rotation angles 40°, II — from 40° to 70°, III — 70° and above.

Results. We found a relation between SBP and both velocity and resistance indices in both renal vessels. There is an increase in the incidence and amplitude of SBP fluctuations in patients with all rotation degrees with the direct association with the severity of PKM. The classification of PKM patients based on the sum of rotation angles measured by ultrasound and Doppler examinations is highly efficient, and the accuracy was 89,13%.

Conclusions. The changes in renal veins seem to contribute to the SBP elevation. The measurement of BP in six static states can enable new insight on the physiological BP changes and will help early diagnostics and verification of pathogenic factors responsible for the development of hypertension in patients with PKM and position-dependent changes of the main renal venous flow.

About the Authors

A. G. Tonyan
Multidisciplinary Medical Center «CityClinic»
Russian Federation

MD, PhD, Urologist,

Krasnodar



V. L. Medvedev
Kuban State Medical University
Russian Federation

MD, PhD, MDSc, Professor, Head, Department of Urology,

4 Sedin street, Krasnodar, 350063,

 



A. S. Tatevosyan
Kuban State Medical University
Russian Federation

MD, PhD, MDSc, Professor, Department of Urology,

4 Sedin street, Krasnodar, 350063,

 



S. A. Tonyan
Multidisciplinary clinic «MAMME»
Russian Federation

MD, Physician,

Krasnodar



S. G. Butaeva
Russian Medical Academy of postgraduate education
Russian Federation

MD, PhD Student, Department of Endocrinology and Diabetology,

Moscow



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For citations:


Tonyan A.G., Medvedev V.L., Tatevosyan A.S., Tonyan S.A., Butaeva S.G. The association between systolic blood pressure and positional changes of the main renal venous blood flow. "Arterial’naya Gipertenziya" ("Arterial Hypertension"). 2015;21(5):477-486. (In Russ.) https://doi.org/10.18705/1607-419X-2015-21-5-477-486

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