Overview
This selected example has a mobile left atrial mass that intermittently obstructs mitral inflow. Its repeating eight-beat mobility pattern is an authored illustration, not random measurement noise or a prediction of actual posture, syncope or tumor motion. There is no separate position control.
Compare wedge with LVEDP and inspect LV filling and the schematic heart view across several beats. The native mitral valve is not assigned fixed stenosis merely because the mass obstructs inflow. Valve procedures do not remove this mass.
Choose PCG in Hemodynamic Overlay, then Listen for the selected low-pitched tumor-plop illustration. Pause and hover or touch the named sound marker. A plop is not present in every myxoma; its absence cannot exclude a mass. The separate brighter pericardial knock belongs to constrictive physiology.