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Figure 1 Proportion of arrhythmias that indicated trans-septal catheterization in the survey for the year 2003. AF = atrial fibrillation; APA = accessory pathway-mediated arrhythmias; AT, Afl = left atrial tachycardia/atrial flutter; AVNRT = atrioventricular node re-entrant tachycardia; VT = ventricular tachycardia.