 | NEURO-CARDIOVASCULAR REGULATION: From Molecules to Man
Copyright © 2001 by the New York Academy of Sciences
description
Annals of the New York Academy of Sciences 940:299-306 (2001)
© 2001 New York Academy of Sciences
Evidence for Central Organization of Cardiovascular Rhythms
NICOLA MONTANO,
ALBERTO PORTA AND
ALBERTO MALLIANI
Centro Ricerche Cardiovascolari, CNR, Dipartimento di Scienze Precliniche LITA di Vialba, Medicina Interna II, Ospedale "L. Sacco," Università degli Studi di Milano, Milano, Italy
Address for correspondence: Nicola Montano, Centro Ricerche Cardiovascolari, CNR, DiSP LITA di Vialba, Università degli Studi di Milano, Ospedale "L. Sacco," Via G. B. Grassi 74, 20157 Milano, Italy. Voice: +39-02-38210535; fax: +39-02-38210533.
nicola.montano{at}unimi.it
Spectral analysis of heart rate and arterial pressure variabilities is a powerful noninvasive tool that is increasingly used to infer alterations of cardiovascular autonomic regulation in a variety of physiological and pathophysiological conditions such as hypertension, myocardial infarction, and congestive heart failure. A most important methodological issue to properly interpret the results obtained by the spectral analysis of cardiovascular variability signals is represented by the attribution of neurophysiological correlates to these spectral components. In this regard, recent application of spectral techniques to the evaluation of the oscillatory properties of sympathetic efferent activity in animals as well as in humans offers a new approach to a better understanding of the relationship between cardiovascular oscillations and autonomic regulation. The data so far collected seem to suggest the presence of a centrally organized neural code, characterized by excitatory and inhibitory neural mechanisms subserving the genesis and the regulation of cardiovascular oscillations concerning the major variables of autonomic regulation.
Key Words: Heart rate variability • Sympathetic activity • Spectral analysis • Baroreflex mechanisms
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