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Baroreflex sensitivity (BRS) and heart rate variability (HRV) have significant influence on the patients' prognosis after cardiovascular events. The following study was performed to assess differences in the response of the autonomic regulation in hypertensive and normotensive patients undergoing cardiac surgery with heart-lung machine. 166 consecutive patients were enrolled in a prospective study;...
Little is known on the effects of autonomic alterations on the characteristics of self-similarity of cardiovascular time series. To clarify this issue, changes in scaling exponents for blood pressure and heart rate following sympathetic and parasympathetic blockades were studied. We recorded RR interval (RRI) and mean arterial pressure (MAP) beat by beat in 8 volunteers before and after administration...
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