Methods Study DesignWe conducted a longitudinal and prospective cohort study of all the consecutive patients undergoing scheduled PVI between June 2015 and May 2016 at the Instituto Cardiovascular de Buenos Aires (ICBA). Patients with paroxysmal or persistent atrial fibrillation (AF), either refractory or intolerant to antiarrhythmic therapy, and those with recurrent AF undergoing a new pulmonary vein ablation were included.The information was introduced in the database of the electrophysiology laboratory of the ICBA and was prospectively retrieved.

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We present a patient with no structural heart disease who attended the medical consultation with a preexcited tachycardia simulating a ventricular tachycardia originated from the left ventricular outflow tract or mitroaortic continuity.