title: [Correlation of intracardiac pressures and electrical atrial potentials with morphology and function of overloaded atria assessed by echocardiography].
abstract: BACKGROUND
  In patients with chronic complete heart block or single chamber pacing and preserved sinus depolarization, left and right atria (LA, RA) may suffer from increased intraatrial pressure resulting from atrioventricular dyssynchrony (AVDys), dilate and lose their contractile function. The purpose of the study was to find out whether any correlation exists between the echocardiographically measured LA, RA morphological and functional parameters on one hand and the intracardiac RA pressures and electrical potentials on the other hand in patients with chronic AVDys.
  
  
  METHODS
  In 26 pts (77 +/- 10 years, 16 males), where a chronic AVDys was the most important patophysiological mechanism of atrial overloading, the intraatrial pressures (atrial, right ventricular, pulmonary arterial and wedge pressure/PWP/) and electrical potentials (upper, middle, lower part of RA and RA appendage) were correlated with atrial diameters, volumes, ejection fraction and filling parameters.
  
  
  RESULTS
  There was a moderate inverse correlation between the LA ejection fraction and PWP: r = -0,489, p = 0,025 at a level of significance 0.05, but no relationship between PWP and LA size/volumes. No correlation between RA potentials or intracardiac pressures and RA morphologic or functional features were documented.
  
  
  CONCLUSIONS
  In this study, an inverse correlation between the capillary wedge pressure and left atrial ejection fraction in pts with chronic atrioventricular dyssynchrony was documented. No other correlation between echocardiographic parameters and intracardiac pressures or electrical potentials was found.
authors.affiliation: I. interní kardiologická klinika FN, Olomouci. dan.marek@fnol.cz
authors.forename: Dan
authors.initials: D
authors.lastname: Marek
authors.forename: Eliska
authors.initials: E
authors.lastname: Sovová
authors.forename: Marie
authors.initials: M
authors.lastname: Berková
authors.forename: Martin
authors.initials: M
authors.lastname: Fiala
authors.forename: Jan
authors.initials: J
authors.lastname: Lukl
authors.forename: Cestmír
authors.initials: C
authors.lastname: Cíhalík
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D016280:Atrial Function, Right; D004452:Echocardiography; D022062:Electrophysiologic Techniques, Cardiac; D005260:Female; D006325:Heart Atria / Q000000981:diagnostic imaging*; D006327:Heart Block / Q000000981:diagnostic imaging / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged