Left atrial contractile strain is the independent predictor of LV remodeling after ST-segment elevation myocardial infarction

Methods One hundred one (79 males, 22 females, mean age 58.3±11.5 years) patients, who underwent CMR 3-5 days and 6 months after first STEMI treated with primary percutaneous coronary intervention, were enrolled. Cine, T2-weighted STIR and late gadolinium enhancement (LGE) CMR images were assessed off-line using dedicated software (QMass 7.5, Medis, Leiden, The Netherlands). Feature tracking cine-sequence based left atrial strain were measured using Diogenes CMR (TomTec Imaging Systems, Munich, Germany) in 2and 4-chamber views. Segmental strain values were averaged from two views to obtain average reservoir, conduit and contractile strain. Logistic regression analysis was performed in stepwise forward fashion to determine CMR predictors of LV remodeling. The outcomes were expressed by odds ratio (OR) with corresponding 95% confidence interval (CI).