Figure 1.

Semi automatic left atrial border tracing by marking (●) at 4 mitral annular points (lateral, septal, inferior, anterior) and an atrial superior dome point opposite the annulus (A). The automatic border tracing is then shown by the software. The left atrial end diastolic volume (EDV), end systolic volume (ESV) and ejection fraction (EF) are calculated automatically by the software and displayed on the right side of the screen (B). SV = stroke volume.