title: Intravenous myocardial contrast echocardiography predicts regional and global left ventricular remodelling after acute myocardial infarction: comparison with low dose dobutamine stress echocardiography.
abstract: OBJECTIVE
  To assess the role of intravenous myocardial contrast echocardiography (MCE) in predicting functional recovery and regional or global left ventricular (LV) remodelling after acute myocardial infarction (AMI) compared with low dose dobutamine stress echocardiography (LDSE).
  
  
  METHODS
  21 patients with anterior AMI and successful primary angioplasty underwent MCE and LDSE during the subacute stage (2-4 weeks after AMI). Myocardial perfusion and contractile reserve were assessed in each segment (12 segment model) with MCE and LDSE. The 118 dyssynergic segments in the subacute stage were classified as recovered, unchanged, or remodelled according to wall motion at six months' follow up. Percentage increase in LV end diastolic volume (%DeltaEDV) was also calculated.
  
  
  RESULTS
  The presence of perfusion was less accurate than the presence of contractile reserve in predicting regional recovery (55% v 81%, p < 0.0001). However, the absence of perfusion was more accurate than the absence of contractile reserve in predicting regional remodelling (83% v 48%, p < 0.0001). The number of segments without perfusion was an independent predictor of %DeltaEDV, whereas the number of segments without contractile reserve was not. The area under the receiver operating characteristic curve showed that the number of segments without perfusion predicted substantial LV dilatation (%DeltaEDV > 20%) more accurately than did the number of segments without contractile reserve (0.88 v 0.72).
  
  
  CONCLUSIONS
  In successfully revascularised patients with AMI, myocardial perfusion assessed by MCE is predictive of regional and global LV remodelling rather than of functional recovery, whereas contractile reserve assessed by LDSE is predictive of functional recovery rather than of LV remodelling.
authors.affiliation: Department of Cardiology, Osaka City General Hospital, Osaka, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Abe
authors.forename: T
authors.initials: T
authors.lastname: Muro
authors.forename: Y
authors.initials: Y
authors.lastname: Sakanoue
authors.forename: R
authors.initials: R
authors.lastname: Komatsu
authors.forename: M
authors.initials: M
authors.lastname: Otsuka
authors.forename: T
authors.initials: T
authors.lastname: Naruko
authors.forename: A
authors.initials: A
authors.lastname: Itoh
authors.forename: M
authors.initials: M
authors.lastname: Yoshiyama
authors.forename: K
authors.initials: K
authors.lastname: Haze
authors.forename: J
authors.initials: J
authors.lastname: Yoshikawa
mesh_terms: D000368:Aged; D004452:Echocardiography / Q000379:methods / Q000592:standards*; D025401:Echocardiography, Stress / Q000379:methods / Q000592:standards*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D009200:Myocardial Contraction / Q000502:physiology; D009203:Myocardial Infarction / Q000000981:diagnostic imaging* / Q000503:physiopathology; D011237:Predictive Value of Tests; D012680:Sensitivity and Specificity; D013318:Stroke Volume / Q000502:physiology; D020257:Ventricular Remodeling / Q000502:physiology*