title: Cardiovascular variability is similarly altered in coronary patients with normal left ventricular function and in heart failure patients.
abstract: OBJECTIVE
  After myocardial infarction (MI), baroreflex function is impaired and heart rate (HR) variability is reduced. An impaired baroreflex has been observed also in coronary patients with no previous MI, leading to hypothesize alterations of HR variability also in these patients. The aim of the present work was, therefore, to study whether and to what extent cardiovascular variability is altered in coronary patients with no previous MI.
  
  
  METHODS
  Thirty-two individuals were studied: eleven patients with coronary artery disease but no previous MI [coronary artery disease (CAD)], eleven patients with a reduced left ventricular ejection fraction [congestive heart failure (CHF)] and ten age-matched controls (CNT).
  
  
  RESULTS
  Overall HR variability was significantly and similarly reduced in CAD (630 ± 272 ms) and CHF patients (594 ± 395 ms) with respect to CNT (1405 ± 837 ms), this being the case also for the low and high frequency spectral components. Low-frequency oscillations of blood pressure (BP) were also significantly and similarly less pronounced in CAD (0.7 ± 0.7 mmHg) and CHF patients (0.7 ± 0.7 mmHg) compared with CNT (1.8 ± 1.4 mmHg). Moreover, both CAD and CHF patients showed a significantly reduced baroreflex function and an increased pulse-wave velocity with respect to CNT.
  
  
  CONCLUSIONS
  Our study shows that in coronary patients with no MI and no left ventricular dysfunction, there is a profound alteration of both HR and BP variability as in CHF patients, presumably because of a marked impairment of the autonomic modulation of the heart and blood vessels.
authors.affiliation: aDivision of Cardiac Rehabilitation, Ospedale San Gerardo, Monza bDepartment of Clinical Medicine and Prevention, University of Milano-Bicocca, Milan cCardiology Department, Ospedale Desio, Desio dCardiology Department, Ospedale San Gerardo, Monza eUniversity of Milano-Bicocca fIRCCS Fondazione Don Carlo Gnocchi gDivision of Cardiac Surgery, Ospedale San Gerardo, Monza, Italy.
authors.forename: Alberto
authors.initials: A
authors.lastname: Radaelli
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Mancia
authors.forename: Giulia
authors.initials: G
authors.lastname: Balestri
authors.forename: Angelo
authors.initials: A
authors.lastname: Rovati
authors.forename: Alessandra
authors.initials: A
authors.lastname: Anzuini
authors.forename: Marco
authors.initials: M
authors.lastname: Di Rienzo
authors.forename: Giovanni
authors.initials: G
authors.lastname: Paolini
authors.forename: Paolo
authors.initials: P
authors.lastname: Castiglioni
mesh_terms: D000368:Aged; D001341:Autonomic Nervous System / Q000503:physiopathology; D017704:Baroreflex / Q000502:physiology*; D001794:Blood Pressure; D003324:Coronary Artery Disease / Q000503:physiopathology*; D005260:Female; D006333:Heart Failure / Q000503:physiopathology*; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000503:physiopathology*; D018487:Ventricular Dysfunction, Left / Q000503:physiopathology; D016277:Ventricular Function, Left