Continuous Blood Pressure Monitoring in the Clinical Evaluation of Hypertensive Patients and in the Study of Neural Cardiovascula Control
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Towards the end of the sixties Pickering and his Oxford group (1,2) deviced a method that allowed blood pressure to be measured intra-arterially in ambulant subjects with limited interference with their ambulation and to some extent with their life-patter. Beside being repeatedly referred to in this workshop, the Oxford method is too well known to necessitate a detailed description. Suffice it to say that its design effectively minimizes the incovenience and risk inherent to the invasiveness of the procedure, and that its technical features usually allow a blood pressure signal of adequate quality to be recorded (3). By means of some precautions the recording can be carried out under condition of stable 0 signal and equal sensitivity throughout the range of existing blood pressures.
We have adopted the Oxford method since 1977 and have so far completed few hundred 24 hour blood pressure recordings in normotensive subjects and in subjects with untreated or treated hypertension of essential or secondary nature. Although this large experience has allowed us to gather information on several pathophysiological and clinical aspects of conditions of deranges blood pressure, we will limit ourselves to three topics only: 1) effects of bahaviours on blood pressure, 2) blood pressure variability and 3) clinical applications of continuous blood pressure recording.
KeywordsHeart Rate Variability Mean Arterial Pressure Blood Pressure Variability Blood Pressure Recording Blood Pressure Signal
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