Late gadolinium enhancement-cardiovascular magnetic resonance as a predictor of response to cardiac resynchronization therapy in patients with ischaemic cardiomyopathy

Europace. 2007 Nov;9(11):1031-7. doi: 10.1093/europace/eum133. Epub 2007 Oct 12.


Aim: To determine whether myocardial scarring, quantified using late gadolinium enhancement-cardiovascular magnetic resonance (LGE-CMR), predicts response to cardiac resynchronization therapy (CRT).

Methods and results: A total of 45 patients with ischaemic cardiomyopathy [age 67.1 +/- 10.4 years (mean +/- SD)] underwent assessment of 6 min walking distance (6MWD) and quality of life (QoL) before and after CRT. Scar size (percentage of left ventricular mass), location, and transmurality were assessed prior to CRT using LGE-CMR. Responders (survived for 1 year with no heart failure hospitalizations, and improvement by >or=1 NYHA classes or >or=25% 6MWD) had a higher left ventricular ejection fraction (P = 0.048), smaller scars (<33%) (P = 0.009), and fewer scars with >or=51% transmurality (P = 0.002). Scar size correlated negatively with change in 6MWD (r = -0.54, P < 0.001) and positively with changes in QoL scores (r = 0.35, P = 0.028). Responder rates in patients with <33% scar were higher than in those with >or=33% scar (82 vs. 35%, P < 0.01). Responder rates in patients with scar transmurality <51% were higher than in those with >or=51% (89 vs. 46%, P < 0.01). Among the patients with posterolateral scars, a transmurality value of >or=51% was associated with a particularly poor response rate (23%), compared with scars with <51% transmurality (88%, P < 0.001). In multivariate analyses, both scar size (P = 0.022) and transmurality (P = 0.004) emerged as predictors of response. In patients with posterolateral scars, pacing outside the scar was associated with a better responder rate than pacing over the scar (86 vs. 33%, P = 0.004).

Conclusions: In patients with ischaemic cardiomyopathy, a scar size >or=33%, a transmurality >or=51%, and pacing over a posterolateral scar are associated with a suboptimal response to CRT.

Publication types

  • Clinical Trial

MeSH terms

  • Aged
  • Cardiac Pacing, Artificial / methods*
  • Cicatrix / diagnostic imaging
  • Cicatrix / pathology
  • Echocardiography
  • Exercise Tolerance / physiology
  • Female
  • Gadolinium*
  • Humans
  • Logistic Models
  • Magnetic Resonance Imaging / methods*
  • Male
  • Middle Aged
  • Multivariate Analysis
  • Myocardial Ischemia / diagnostic imaging
  • Myocardial Ischemia / pathology*
  • Myocardial Ischemia / therapy*
  • Myocardium / pathology
  • Predictive Value of Tests
  • Quality of Life
  • Treatment Outcome


  • Gadolinium