TEE video (midesophageal long-axis view) showing air in the LA

This TEE midesophageal long axis view shows air in the LA, which has layered out along the non-dependent, superior aspect of the LA behind the ascending aorta. The air bubbles are strong echo-reflectors and create a reverberation artifact that appears as linear streaks extending into the scan plane. This artifact is also termed a comet-tail or ring-down artifact.