PRE-SURGICAL AND POST-SURGICAL ALTERATIONS OF ARTERIAL BLOOD PRESSURE CIRCADIAN RHYTHM Article Katinas G.S., Astakhov Y.S., Sedov S.M., Yashin S.M., Chibisov S.M., Shastun S.A., Astakhov S.Y., Boldyreva I.B., Gromyko A.G., Merkuryeva T.B., Nefedova D.M., Smirnov D.A., Mitina E.V. World Heart Journal. Vol. 6. 2014. P. 261-271