Comparison of two-dimensional longitudinal strain with rest single photon emission tomography perfusion imaging for transmural scar identification in patients with ischemic left ventricular systolic dysfunction

摘要

Ischemic cardiomyopathy is the most frequent cause of the left ventricular (LV) systolic dysfunction with the heart failure syndrome. Revascularization in patients with coronary artery disease and LV dysfunction has been shown to improve LV function, heart failure symptoms and prognosis. Unfortunately, only a part of revascularized patients shows the LV reverse remodeling; therefore, the pre-procedural identification of the ratio between viable and non-viable myocardium is necessary. Contrast enhanced cardiac magnetic resonance (ceCMR) is considered as a reference imaging method in diagnostics of myocardial viability [1]. Single photon emission computed tomography (SPECT) is considered to be a powerful predictor of myocardial viability [2]. Speckle tracking echocardiogra-phy (STE) derived parameters are capable of differentiating potentially viable segments from those showing the scar extent above 50% [3]. However, these segments can display even more than 30% of the functional recovery after revascularization [4].