The role of echocardiography in predicting responders to cardiac resynchronization therapy - Results from the Japan cardiac resynchronization therapy registry trial (J-CRT)

Yoshihiro Seo, Hiroshi Ito, Satoshi Nakatani, Mitsuaki Takami, Shigeto Naito, Tsuyoshi Shiga, Kenji Ando, Yuji Wakayama, Kazutaka Aonuma

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

Background: This multicenter prospective cohort study aimed to identify both ability of echocardiographic parameters to detect cardiac resynchronization therapy (CRT) volume responders and relation of these parameters with clinical outcomes. Methods and Results: CRT responder was defined as ≥15% reduction of left ventricular (LV) end-systolic volume at 6 months. Seven echocardiographic dyssynchrony parameters were evaluated. The clinical endpoint comprised time to death from any cause or unplanned hospitalization for a major cardiovascular event. Of the 217 patients enrolled, 63 percent were classified as volume responders, in whom significantly fewer events occurred than in non-responders (log rank, P<0.001). No single echocardiographic criterion had significant power to detect volume responders, but a combining measurement of dyssynchrony between septum and LV free wall with M-mode and tissue Doppler imaging was independently associated with volume responders. In addition, this combined parameter was associated with the endpoint (hazard ratio, 0.66, 95% confidence interval 0.30-0.98, P=0.04). In contrast, left bundle branch block was identified as an independent predictor of volume responders and more strongly associated with the endpoint (hazard ratio, 0.38, 95% confidence interval 0.20-0.72, P=0.003). Conclusions: Echocardiographic parameters did not show significant power to detect CRT responders independently.

Original languageEnglish
Pages (from-to)1156-1163
Number of pages8
JournalCirculation Journal
Volume75
Issue number5
DOIs
Publication statusPublished - May 1 2011

Keywords

  • Cardiac resynchronization therapy
  • Echocardiography
  • Heart failure

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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