Figure 2From: Flow-volume loops derived from three-dimensional echocardiography: a novel approach to the assessment of left ventricular hemodynamics A schematic illustration of flow-volume loop during one cardiac cycle. The loop proceeds in clockwise direction. The upper part of the loop (above zero flow) describes flow-volume relationship during diastole, and the lower part of the loop (below zero flow) shows the relationship during systole.Back to article page