Fig. 7
From: Bedside assessment of left atrial pressure in critical care: a multifaceted gem
LA strain using non-foreshortened A4C LA views. White dashed strain curve showing average values of 6 segments. Ventricular end-diastole is recommended as the time reference to define the zero-baseline for strain curves. As depicted by the white arrows: LA reservoir strain = difference of the strain value at mitral valve opening minus ventricular end-diastole. LA conduit strain = difference of the strain value at the onset of atrial contraction minus mitral valve opening. LA pump strain = difference of the strain value at ventricular end-diastole minus onset of atrial contraction [44]