Fig. 2.

Two patients with a LAA filling defect on CTA based on thrombus. a CTA in axial view showing a LAA filling defect (yellow arrow). The area of low attenuation shows a homogeneous aspect, HU 50–70 and a well-defined concave border. b, c TEE showing a solid structure adherent to the LAA wall most likely thrombus (red arrow). d CTA in axial view showing LAA filling defect (yellow arrow). The area of low attenuation shows a homogeneous aspect, HU 70–90 and a well-defined convex border. e TEE showing LAA thrombus (red arrow). f Pulsed-wave Doppler showing low LAA flow velocity