- Speckle tracking echocardiography through GLS can detect left ventricular systolic dysfunction early compared to convntional echocardiography. + Left ventricular ejection fraction (LVEF) did not differ between the septic shock and sepsis groups but the GLS in the septic shock group was significantly reduced compared to the sepsis group (- 14.6 ± 3.3% versus - 17.1 ± 3.3%), p <0.01.