[Character of the baroreceptor reflexes in experimental arterial hypertension]

In normotensive, barodenervated rats and those with experimental renal hypertension, arterial BP, heart rate and behaviour were recorded during aversive emotional stress. Cardiochronotropic component of the baroreceptor reflex and the activity of the energy metabolism enzymes were tested in structures of the medulla oblongata. The depression of the baroreceptor reflex in hypertensive rats was accompanied by no significant changes of enzymatic activity in the nucleus tractus solitarii but led to biphasic reactions of the BP during emotional stress. A possible role of the baroreceptor reflex suppression in genesis of hypertension is discussed.