PMC5764877_01
Transthoracic and transesophageal evaluation of unroofed coronary sinus atrial septal defect. (A) TTE, parasternal long axis view, arrow pointing unroofed portion of coronary sinus. (B) TTE, color doppler, coronary sinus drains into left atrium. (C) TEE, arrow pointing unroofed portion of coronary sinus. (D) TEE, color doppler, flow between right and left atria. (E) 3D TEE, en face view of the atrial septal defect. (F) 3D TEE, external wall of coronary sinus (white arrow), unroofed internal wall of coronary sinus (red arrow).. 3D = three-dimensional; TTE = transesophageal echocardiography.
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F1
A suspicious drop in the roof of the coronary sinus was observed on transthoracic parasternal long axis view (arrow; Figure 1A, Supplementary Video 1). Color Doppler revealed significant flow through the coronary sinus (Figure 1B, Supplementary Video 2). TEE revealed the UCS (arrow; Figure 1C). Color Doppler demonstrated significant shunting through the UCS and a small shunt through the foramen ovale (Figure 1D). 3D TEE depicted the en face view of the defect from the left atrium (Figure 1E, Supplementary Videos 3 and 4).The unroofed portion of the coronary sinus was visualized in detail (white arrow: coronary sinus, red arrow:unroofed portion; Figure 1F, Supplementary Video 5).