Аннотация:The aim of this study was to reveal the changes of short-term cardiovascular variability in rats with
sustained primary hypertension and correlate them with functional alterations of peripheral arteries.
12-month-old SHR as compared to Wistar rats demonstrated prominent reductions of mean arterial
pressure and pulse interval spectral powers in the range 0.25-0.75 Hz. These alterations were
associated with prominent reductions of cardiac baroreflex gain and constrictor responses of small
arteries to electrical stimulation of sympathetic fibers and exogenous noradrenaline. We suggest that
both central and peripheral mechanisms are responsible for the reduction of baroreflex arterial
pressure oscillations in mature SHR.