PMC9029670_01
(A) Transesophageal echocardiogram (TEE) depicts a noncontinuous linear structure that seems to attach to the intra-atrial septum. (B) TEE further defines the membrane as a continuous structure, with color Doppler showing flow across membrane (see Video 1). (C) 3-dimensional (3D) TEE confirms what was seen in 2D imaging. (D) Cardiac magnetic resonance imaging confirms cor triatriatum dexter. (E) Coronary computed tomography angiography depicts low-attenuation structure traversing through right atrium. (F) Intraoperatively, cor triatriatum dexter was confirmed, but importantly, right ventricular inflow obstruction was excluded. RV: right ventricle; LV: left ventricle; LA: left atrium; RA: right atrium
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F1
Coronary computed tomography angiography (CCTA), which was ordered for coronary evaluation, confirmed the presence of cor triatriatum dexter (Figure 1, Video 1).