title: Right ventricular outflow tract function in chronic heart failure.
abstract: BACKGROUND
  Heart failure (HF) is a common, progressive, complex clinical syndrome and a subset of HF patients has symptoms out of proportion to the resting hemodynamics and left ventricular ejection fraction (LVEF). Right ventricular (RV) function is a powerful prognostic factor in HF, but assessing it is a challenge because of the right ventricle's complex geometry.
  
  
  OBJECTIVE
  The aim of this study was to investigate the clinical application value of RV outflow tract (RVOT) function measured by transthoracic echocardiography in HF patients.
  
  
  METHODS
  We prospectively investigated 36 chronic HF patients with dilated heart and LV systolic dysfunction and 21 healthy control subjects (normal ventricular function and ECG, and no cardiac risk factors). In addition to clinical and conventional echocardiographic parameters, RVOT size and fractional shortening (RVOT-FS) parameters were analyzed.
  
  
  RESULTS
  The RVOT-FS was less in HF patients than healthy controls (18.8±15.7 vs 55.8±6.7, p<0.001) and correlated positively with TAPSE (r=0.814, p<0.001) and inversely with SPAP (r=-0.728, p<0.001) and functional capacity (r=-0.842, p<0.001). There was a statistically significant difference in RVOT-FS among the HF subgroups with regard to NYHA functional capacity (p<0.001), although there was no statistically significant difference with regard to LVEF.
  
  
  CONCLUSIONS
  Although the apparent discordance between LVEF and the degree of functional impairment in HF is not well understood, it may be explained in part by alterations in RV function. We found that the RVOT-FS was a noninvasive and easily applicable measure of RV function and might be used for a comprehensive evaluation and follow-up of HF patients with a combined assessment of RV by other RV parameters.
authors.affiliation: Akay Hospital, Department of Cardiology, Ankara, Turkey.
authors.forename: Bulent
authors.initials: B
authors.lastname: Deveci
authors.affiliation: Turkiye Yuksek Ihtisas Training and Research Hospital, Department of Cardiology, Ankara, Turkey.
authors.forename: Kazim
authors.initials: K
authors.lastname: Baser
authors.affiliation: Van Ercis State Hospital, Department of Cardiology, Van, Turkey.
authors.forename: Murat
authors.initials: M
authors.lastname: Gul
authors.affiliation: Turkiye Yuksek Ihtisas Training and Research Hospital, Department of Cardiology, Ankara, Turkey.
authors.forename: Fatih
authors.initials: F
authors.lastname: Sen
authors.affiliation: Turkiye Yuksek Ihtisas Training and Research Hospital, Department of Cardiology, Ankara, Turkey.
authors.forename: Habibe
authors.initials: H
authors.lastname: Kafes
authors.affiliation: Tatvan State Hospital, Department of Cardiology, Bitlis, Turkey.
authors.forename: Sedat
authors.initials: S
authors.lastname: Avci
authors.affiliation: Burdur State Hospital, Department of Cardiology, Burdur, Turkey.
authors.forename: Orkun
authors.initials: O
authors.lastname: Temizer
authors.affiliation: Turkiye Yuksek Ihtisas Training and Research Hospital, Department of Cardiology, Ankara, Turkey. Electronic address: ozcanozeke@gmail.com.
authors.forename: Ozcan
authors.initials: O
authors.lastname: Ozeke
authors.affiliation: Turkiye Yuksek Ihtisas Training and Research Hospital, Department of Cardiology, Ankara, Turkey.
authors.forename: Omac
authors.initials: O
authors.lastname: Tufekcioglu
authors.affiliation: Turkiye Yuksek Ihtisas Training and Research Hospital, Department of Cardiology, Ankara, Turkey.
authors.forename: Zehra
authors.initials: Z
authors.lastname: Golbasi
mesh_terms: D004452:Echocardiography; D006333:Heart Failure / Q000175:diagnosis / Q000209:etiology / Q000503:physiopathology*; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D013318:Stroke Volume; D018497:Ventricular Dysfunction, Right / Q000175:diagnosis / Q000209:etiology / Q000503:physiopathology*; D016278:Ventricular Function, Right / Q000502:physiology*; D014694:Ventricular Outflow Obstruction / Q000150:complications* / Q000175:diagnosis / Q000503:physiopathology
keywords: Heart failure; RVOT; Right ventricular function