Figure 11

The pressure–volume loop for the artificial left atrium 1, 5, 10, and 11. The arrows indicate the time course. Mitral valve opening and closure are identified by dots. “A” is the A loop representing the active phase of the atrial cycle and “V” is the V loop associated to the passive phase of the atrial cycle. The blue segment is the reservoir phase; the orange segment is the conduit phase; the grey segment is the pumping phase. Note that the volume axis for LA11 is shifted compared to LA1, LA5, and LA10. The inverse slope of the dashed line represents the atrial compliance. LA left atrium.