Large isolated hydatid cyst of the interventricular septum

A 54-year-old woman was referred to our echocardio-graphy clinic for long-standing hypertension. She did not have any chest pain, dyspnoea, fever or weight loss. She was on losartan of dose 25 mg twice daily. She did not have history of contact with livestock or pet animals. Electrocardiogram showed T-wave inversion in V1–V3 leads. On transthoracic echocardiography, there was a large mass in the interventricular septum (Fig. 1, Videos 1 and 2). Computerised tomography (CT) of the chest showed a cystic mass (85!65 mm) over the interventri-cular septum with a rim-like calcification of its wall consistent with cardiac hydatid cyst (Fig. 2). The lungs appeared normal and free of disease. CT images of the brain and the abdomen were otherwise normal with no cerebral or hepatic involvement. The patient underwent Figure 1 A transthoracic echocardiographic image from subxiphoid window showing the large mass in interventricular septum. Video 1 Transthoracic echocardiogram from subxiphoid showing the large mass in the interventricular septum. Download Video 1 via http://dx. Video 2 Transthoracic echocardiogram from the long-axis para-sternal showing the large mass in the interventricular septum. Download Video 2 via Figure 2 Computed tomography (CT) scan image of the heart showing the large interventricular hydatid cyst with calcified borders.