Abstract
It is generally thought that the sole function of baroreceptors is for the regulation of rapid blood pressure fluctuations caused by postural changes and other motion. However, recent studies have suggested that baroreceptors may also be involved in blood pressure control in the chronic phase. The study was performed to examine the involvement of carotid baroreceptors in blood pressure control in the chronic phase, through determination of the relationship between 24-hour blood pressure data and carotid baroreceptor function. Ambulatory blood pressure, ECG, and the number of steps during exercise were measured every 15 minutes with an ambulatory blood pressure monitor and a 24-hour Holter ECG fitted with an accelerometer (Cardy-II-p, Suzuken KK, Japan). In addition, the dependence of blood pressure on autonomic nerve activity and exercise was analyzed based on the frequency of the RR interval. Patients were divided into three groups based on different blood-pressure types: autonomic nerve-dependent, exercise-dependent, and independent types. Carotid baroreceptor function was evaluated using the sequence method; subjects adopted a supine position on a tilt table and their arterial pressure was monitored continuously using a Fina...Continue Reading
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