Echocardiographic diagnosis of divided right atrium-cor triatriatum dextrum

Area of Science:

• Cardiology
• Congenital Heart Disease
• Cardiac Anatomy

Background:

• Cor triatriatum is a congenital anomaly where an atrium is divided by a membrane.
• Cor triatriatum sinistrum (left atrial division) is clinically recognized, while cor triatriatum dextrum (right atrial division) is rare and primarily a pathological finding.
• The right atrial partition is typically associated with variations in the Eustachian and Thebesian valves.

Observation:

• This report details a rare case of cor triatriatum dextrum.
• The dividing partition in the right atrium was situated between the systemic venous sinus and the distal right atrium, attaching to the inferior vena cava orifice.
• The patient presented with a large atrial septal defect and valvular pulmonary stenosis.

Findings:

• A case of divided right atrium (cor triatriatum dextrum) is described.
• The anomaly was associated with significant comorbidities: a large atrial septal defect and valvular pulmonary stenosis.
• This presentation underscores the rare but complex nature of right atrial partitioning.

Implications:

• Understanding rare congenital anomalies like cor triatriatum dextrum is crucial for accurate diagnosis and surgical planning.
• The association with other cardiac defects necessitates comprehensive echocardiographic and potentially intraoperative assessment.
• Further case reports can enhance the understanding of the spectrum and clinical significance of right atrial division.