Interventricular septal hydatid cyst of the heart presenting with syncope: a rare case report

Figures

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  Figure 1. Transthoracic echocardiography, parasternal short-axis view at the pulmonary level, demonstrating a well-defined 3.6 × 3.9 cm intramyocardial cystic mass within the interventricular septum protruding towards the right ventricular cavity.

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  Figure 2. Transthoracic echocardiography, parasternal long-axis view, demonstrating a large intramyocardial cystic mass within the interventricular septum protruding into the right ventricular outflow tract, causing dynamic right ventricular outflow tract obstruction with preserved left ventricular systolic function.

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  Figure 3. Colour Doppler transthoracic echocardiography (parasternal long-axis view) demonstrating turbulent flow across the right ventricular outflow tract secondary to protrusion of the interventricular septal hydatid cyst, consistent with severe right ventricular outflow tract obstruction.

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  Figure 4. Continuous-wave Doppler echocardiography across the right ventricular outflow tract, obtained during exercise (stress echocardiography), demonstrates a high-velocity systolic jet (Vmax 5.17 m/s) with peak and mean pressure gradients of 107 and 67 mmHg, respectively, confirming severe right ventricular outflow tract obstruction secondary to an interventricular septal hydatid cyst mechanical effect.

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  Figure 5. Transoesophageal echocardiography, mid-oesophageal view, demonstrating a well-defined intramyocardial cystic lesion within the interventricular septum (arrow) with a characteristic ‘cyst-in-cyst’ appearance, protruding towards the right ventricular cavity consistent with cardiac hydatid disease.