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DOES THE BARORECEPTOR‐HEART RATE REFLEX INDICATE THE CAPACITY OF THE ARTERIAL BARORECEPTORS TO CONTROL BLOOD PRESSURE?

1980; Wiley; Volume: 7; Issue: 5 Linguagem: Inglês

10.1111/j.1440-1681.1980.tb00099.x

1440-1681

John Ludbrook, Giuseppe Mancia, Alberto Zanchetti,

Heart Rate Variability and Autonomic Control

SUMMARY 1. We have examined the question asked in the title by studying: the carotid baroreceptor reflex in man with a variable‐pressure neck chamber; the carotid baroreceptor reflex in conscious rabbits with a variable‐pressure capsule around the carotid bifurcation; and the baroreceptor‐heart rate reflex. 2. At rest, the association between the sensitivities of the carotid barorecep‐tor‐blood pressure and ‐heart rate reflexes, and of these with the baroreceptor‐heart rate reflex, is weak. Exercise causes dissociation between control of blood pressure and heart rate. In hypertension, depression of the baroreceptor‐heart rate reflex does not reflect the altered characteristics of the carotid sinus‐blood pressure reflex.