Recoordination Rather than Resynchronization Predicts Reverse Remodeling after Cardiac Resynchronization Therapy

Chun Li Wang, Chia Tung Wu, Yung Hsin Yeh, Lung Sheng Wu, Chi Jen Chang, Wan Jing Ho, Lung An Hsu, Nazar Luqman, Chi Tai Kuo*

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

31 Scopus citations

Abstract

Background: Mechanical discoordination as studied by magnetic resonance imaging has been shown to be a better predictor of left ventricular (LV) reverse remodeling after cardiac resynchronization therapy (CRT) compared with mechanical dyssynchrony. Materials and Methods: This study assessed the value of acute recoordination derived from speckle-tracking echocardiography for predicting response to CRT compared with acute resynchronization. Thirty patients with heart failure scheduled for CRT were studied at baseline, immediately after CRT, and after 6 months of CRT. Acute recoordination after CRT was indexed by an acute reduction in radial discoordination index (RDI), defined as the ratio of average myocardial thinning to thickening during the ejection phase. Results: CRT responders were defined as those patients whose LV end-systolic volume decreased by ≥ 15% at the 6-month follow-up. Immediately after CRT, the responders (n = 18) demonstrated a significant reduction in RDI (P < .001), which was sustained at the 6-month follow-up (P < .001). The nonresponders, however, did not show a significant change in RDI after CRT. LV reverse remodeling at the 6-month follow-up was significantly correlated with acute recoordination (r = 0.75, P < .001) but weakly correlated with acute resynchronization (r = 0.43; P = .02). Conclusions: Receiver operating characteristic analysis revealed that acute recoordination provided the best separation for prediction of CRT responders compared with acute resynchronization, baseline dyssynchrony, or baseline discoordination. LV recoordination after CRT is an acute phenomenon and predicts response to CRT at 6-month follow-up better than resynchronization.

Original languageEnglish
Pages (from-to)611-620
Number of pages10
JournalJournal of the American Society of Echocardiography
Volume23
Issue number6
DOIs
StatePublished - 06 2010

Keywords

  • Cardiac resynchronization therapy
  • Discoordination
  • Dyssynchrony
  • Echocardiography
  • Speckle tracking

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