PMC10161294_01
Schematic diagram. (Reproduced with permission from Tutschek et al.

 Copyright John Wiley and Sons.). Abbreviations: CTS-M, cor triatriatum sinister membrane; LACV, levoatrial cardinal vein; ALA, accessory left atrium; ASD, atrial septal defect; LA, left atrium; LV, left ventricle; RA, right atrium; RV, right ventricle; MV, mitral valve; TV, tricuspid valve; SVC, superior vena cava; Inn. Vein, innominate vein.
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An echocardiogram was performed, which demonstrated LCT with a tiny jet of prograde flow across the CTS membrane from the proximal to distal LA chambers (Figures 1 and 2). The right ventricle was dilated but maintained normal systolic function (see Figures 1 and 2).
Apical 4-chamber echocardiographic view showing cor triatriatum membrane (yellow arrow) in the left atrium.
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An echocardiogram was performed, which demonstrated LCT with a tiny jet of prograde flow across the CTS membrane from the proximal to distal LA chambers (Figures 1 and 2). The right ventricle was dilated but maintained normal systolic function (see Figures 1 and 2).
Apical 4-chamber view with color Doppler, showing severely restricted flow across the cor triatriatum membrane (green arrow).
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There was a decompressing LACV draining to a dilated innominate vein (Figures 3 and 4).
Large decompressing levoatrial cardinal vein (green arrows) arising from left atrium (labeled LA) and draining to the innominate vein superiorly (not shown).
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There was a decompressing LACV draining to a dilated innominate vein (Figures 3 and 4).
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