Background: The accuracy of speckle-tracking echocardiography (STE) depends on temporal resolution. goal this study was to demonstrate the feasibility relatively high frame rate (rHi-FR) (~200 fps) for STE. Methods: In prospective study, echocardiographic images were acquired using clinical scanners patients with normal left ventricular systolic function rHi-FR and conventional (Reg-FR) (~50 FP...