Cor Triatriatum Sinister Identified after New Onset Atrial Fibrillation in an Elderly Man

Figure 4

Transesophageal echocardiogram with Doppler color flow analysis. 2-chamber view showing flow from the pulmonary veins into the proximal accessory left atrium (a); flow across the fenestrated membrane into the distal true left atrium and across the mitral valve (b); biplane view showing mitral regurgitation and bidirectional flow across the membrane (c); and bicaval view showing partial attachment of the membrane to the interatrial septum (d).

(a)

(b)

(c)

(d)