Assessment of myocardial viability at dobutamine echocardiography by deformation analysis using tissue velocity and speckle-tracking

Objectives: Comparison of myocardial tissue-velocity imaging (TVI) and speckle-tracking echocardiography (STE) for prediction of viability at dobutamine echocardiography (DbE). Background: Use of TVI-based strain imaging during DbE may facilitate the prediction of myocardial viability but has technical limitations. STE overcomes these but requires evaluation for prediction of viability. Methods: We studied 55 patients with ischemic heart disease and left ventricular systolic dysfunction (left ventricular ejection fractio