Fig. 1From: Use of speckle-tracking strain in preload-dependent patients, need for cautious interpretation!Flow chart protocol. PLR, passive leg raising; PLR Δ LVOT VTI, passive leg raising variation of left ventricular outflow track velocity–time integral; ↗ LVOT VTI, increase of left ventricular outflow track velocity–time integral after fluid resuscitationBack to article page