Fig. 1From: Independent prognostic value of left atrial function by two-dimensional speckle tracking imaging in patients with non -ST-segment-elevation acute myocardial infarctionMeasurement of global longitudinal left atrial strain from an apical four-chamber view. The white dashed curve represents the global longitudinal atrial strain along the cardiac cycle. GLSs = global left atrial peak negative strain during atrial systole. GLSr = global left atrial peak positive strain during ventricle systole. AVC = aortic valve closureBack to article page