Speckle Tracking Echocardiography for Myocardial Viability Predicting in Patients with Previous Myocardial Infarction
34 patients (41-73 years old) with previous myocardial infarction were included into the study. All patients underwent standard echocardiography with regional wall motion assessing and speckle tracking echocardiography with resting myocardium longitudinal strain measurement before revascularization and in 6 months after that (Vivid 7, GE HC, USA). 510 myocardium segments were analyzed. 333 segments were judged as normokinetic, 102 as hypokinetic, 72 as akinetic, and 3 as dyskinetic. According to the speckle tracking echocardiography longitudinal strain in normokinetic segments was - 15.7 ± 5.5% (-36.0-6.0%) (M ± 0, minimal - maximal values), hypokinetic - -9.3 ± 4.6% (-21.0-4.0%), akinetic - -5.3 ± 4.5% (-19.0-11.0%) (P < 0,0001 for all comparisons). Cut off value of myocardium longitudinal strain for viability identifying was -10.5% (AUC - 0.71, sensitivity - 83%, specificity - 53%). Value of speckle tracking echocardiography for viable myocardium identification in patients with previous myocardial infarction was shown.