[Carotid sinus and cardiopulmonary baroreceptor reflex in patients with hypertension].

The nature of sinocarotid and cardiopulmonary baroreceptor reflex was examined in 33 patients with labile hypertensive disease (HD). The mechanic receptors of the sinocarotid area was activated by a neck barochamber; lower extremity decompression was used to test the vasoconstrictor cardiopulmonary baroreflex. The studies demonstrated that the activation of the mechanic receptors led to less severe bradycardia in hypertensives than in healthy persons. At the same time blood pressure fall with a decrease in neck chamber pressure achieved higher values in the patients than in normotensives, which was due to vasodilation in most patients. A direct relation was proved to exist between the degree of a decrease in the cardiochronotropic baroreflex component, presence of its vasomotor component, and disease duration. The hypertensives displayed increased in vasoconstrictor cardiopulmonary baroreceptor reflex.