Abstract

We present a clinical case of cardiac resynchronization device implantation in a patient with a zone of late left ventricular activation in the area of the anterior coronary sinus vein, which, however, was unsuitable for endovascular implantation and stable electrode placement in it. This anatomical feature was diagnosed at the outpatient stage using a noninvasive mapping technique. Using this approach, we were able to understand that an epicardial electrode implantation, instead of traditional endovascular implantation of the left ventricular electrode through the coronary sinus vein, is indicated for the patient. Targeted implantation of an epicardial electrode in the area of interest on the epicardial surface of the left ventricle in the basal part of the anterolateral wall allowed achieving a complete clinical response to resynchronization therapy.

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