Tehran University of Medical Sciences The Research in Heart Yield and Translational Medicine (RHYTHM) 3115-7270 5 3 2010 09 15 146 149 Ahmad Yamini Sharif Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran. Gholamreza Davoodi Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran. Ali Vasheghani Farahani Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran. Hadi Fadavi Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran. Ali Kazemi Saeed Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran. Saeed Sadeghian Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran. Fatemeh Ghazachai Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran. Mehrdad Sheikhvatan Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran. 2015 10 03 The use of diagnostic and therapeutic methods for assessing pulmonary vein due to its status as a main source of ectopic beats for the initiation of atrial dysrrythmias is strongly recommended.  We report the case of a 13-year-old girl who was admitted to our hospital with the electrocardiogram manifestation of an ectopic atrial tachycardia. The focus of arrhythmia was inside the right upper pulmonary vein. The patient underwent successful ablation with a conventional electrophysiology catheter via the retrograde aortic approach. We showed that when the origin of atrial tachycardia is in the right upper pulmonary vein, it is possible to advance the catheter into this vein via the retrograde aortic approach and find the focus of arrhythmia. This case demonstrates that right upper pulmonary vein mapping is feasible through the retrograde aortic approach and it is also possible to ablate the arrhythmia using the same catheter and approach. https://rhythm.tums.ac.ir/index.php/jthc/article/view/179 https://rhythm.tums.ac.ir/index.php/jthc/article/download/179/177