Double‐Chambered Left Ventricle: Unusual Presentation with an Apical Defect in a Thallium Scan in a Middle‐Aged, Asymptomatic Woman

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Abstract
A left ventricular apical filling defect was found in a whole‐body thallium scan performed for routine follow‐up for surgically cured thyroid cancer in a 51‐year‐old woman. She had no cardiovascular symptoms, and her electrocardiogram at rest and during exercise was unremarkable. Transthoracic and transesophageal echocardiography revealed a double‐chambered left ventricle. A prominent fibromuscular ridge distal to the papillary muscles was seen dividing the left ventricular cavity into a small apical portion and a large basal portion. There was no significant intraventricular gradient. No treatment was necessary, and the patient has remained asymptomatic in a 4‐year follow‐up.