Left Ventricular Outflow Tract Obstruction Due to Cardiac Hamartoma

TL;DR

A rare benign heart tumor caused blockage in a young woman's heart and was successfully treated with surgery.

Contribution

This case report presents a rare presentation and successful treatment of a cardiac hamartoma causing LVOT obstruction.

Findings

A 19-year-old female had a cardiac hamartoma causing left ventricular outflow tract obstruction.

Surgical intervention resolved the obstruction and the patient remained asymptomatic during follow-up.

CMR imaging showed a 5 x 3 cm mass with heterogeneous late gadolinium enhancement.

Abstract

Hamartoma of mature cardiac myocytes (HMCM) is a rare, benign cardiac tumor. We report a case of a 19-year-old female with an atypical presentation, including significant weight loss and abnormal electrocardiogram. A transthoracic echocardiogram (TTE) revealed a mass causing left ventricular outflow tract (LVOT) obstruction, confirmed by cardiac magnetic resonance (CMR) imaging showing a 5 x 3 cm mass contiguous with the right ventricular free wall and exhibiting heterogeneous, diffuse late gadolinium enhancement. The patient subsequently underwent sternotomy for surgical biopsy and septal myectomy, with histology of the mass being consistent with HMCM. The patient remained asymptomatic during her 6-month follow-up.

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