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Background:To assess the entrance skin dose (ESD) during radiofrequency catheter ablation procedures for tachyarrhythmia including atrial fibrillation (Af).Methods:This study focused on 99 consecutive patients who underwent procedures for tachyarrhythmia (Af; n = 34, non‐Af; n = 65) in three institutions. The non‐Af group included atrial flutter, atrial tachycardia, paroxysmal supraventricular tachycardia, ventricular tachycardia, ventricular premature contraction, atrial premature contraction, atrioventricular nodal reentry tachycardia, and Wolff‐Parkinson‐White syndrome. In two of the three institutions, the procedures were performed for both Af and non‐Af. The ESDs were measured using 100 radiosensitive indicators attached to the back of each patient's jacket at 5‐cm intervals. For statistical analyses, multiple regression analysis (the dependent variable, Max‐ESD; and the independent variables, dose area product [DAP], total fluoroscopic time [TFT], body mass index, etc.), Pearson's correlation test, and the Mann‐Whitney test were employed....
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