title: Right ventricular dyssynchrony in heart failure: a tissue Doppler imaging study.
abstract: BACKGROUND
  The development of right ventricular dysfunction is a poor prognostic sign in patients with heart failure (HF). Although left ventricular dyssynchrony has been well described, it is not known whether right ventricular dyssynchrony coexists in HF. We used tissue Doppler imaging to determine whether right ventricular dyssynchrony is also present in HF patients.
  
  
  RESULTS
  In 34 HF patients (mean age 56 +/- 13 years), we measured longitudinal strain at the right ventricular free wall, interventricular septum, and left ventricular lateral wall. Right ventricular and left ventricular dyssynchrony were defined as the difference in time to peak strain between the right ventricular free wall and the septum and between the left ventricular lateral wall and septum, respectively. Mean right ventricular dyssynchrony was 59 +/- 45 ms and the mean left ventricular dyssynchrony was 80 +/- 62 ms. We found a strong correlation between right ventricular dyssynchrony and pulmonary artery systolic pressure (r = 0.73; P < .001) and a negative correlation between right ventricular dyssynchrony and right ventricular fractional area change (r = -0.43; P < .02).
  
  
  CONCLUSIONS
  HF patients exhibit right ventricular dyssynchrony by strain imaging which correlates with pulmonary hypertension and right ventricular dysfunction.
authors: Cardiovascular Institute, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania 15213-2582, USA.
authors: Navin
authors: N
authors: Rajagopalan
authors: Kaoru
authors: K
authors: Dohi
authors: Marc A
authors: MA
authors: Simon
authors: Matthew
authors: M
authors: Suffoletto
authors: Kathy
authors: K
authors: Edelman
authors: Srinivas
authors: S
authors: Murali
authors: Angel
authors: A
authors: López-Candales