PMC5902121_01
(a) An apical four-chamber view demonstrating a markedly dilated left atrium separated into two chambers by a membrane. (b) Colour Doppler images demonstrating flow across the fenestration in the membrane and across the mitral valve.
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fig1
Transthoracic echocardiography (TTE) demonstrated a markedly dilated left atrium in the four-chamber view (51 mm) divided into 2 chambers by a membrane (Figure 1).
Continuous wave Doppler signal across the opening of the cor triatriatum membrane showing mildly accelerated flow throughout the cardiac cycle. The peak diastolic gradient was measured at 6 mmHg.
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fig2
Continuous wave Doppler showed flow across the membrane with a peak diastolic gradient of 6 mmHg, peak systolic gradient of 2 mmHg, and a mean of 4 mmHg (Figure 2).