Introduction: False tendon (FT) is a thin, fibrous or fibromuscular structure that crosses the ventricular cavity without connection with the valvular apexes. Usually found in the left ventricle and only 4 % in the right ventricle. Could be single or multiple. Objective: To present a case of false ventricular tendon in a patient with a giant cyst of the left ovary, and being an asymptomatic cardiovascular adult. Case: 32-year-old feminine patient diagnosed with a cyst of the left ovary who as part of her preoperative evaluation was subjected to a transthoracic echocardiogram, this showed a band from the free wall of the left ventricle towards the septum internventricular, 2mm thick, crossing the cavity with a systolic-diastolic movement, between the apical and medial thirds of the cavity, which was diagnosed as being a false tendon. Discussion: False tendon have been considered to be an anatomical variant, which in some series has been related to the coexistence of murmurs, alterations of the repolarization, pre-excitation and ventricular arrhythmias, mitral insufficiency and dilatation of the left ventricle.
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