{'fraction_non_alphanumeric': 0.02556818181818182, 'fraction_numerical': 0.007102272727272727, 'mean_word_length': 5.527777777777778, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Ultra Rapid Local Activity in Adenosine‐Induced Atrial Fibrillation

A 38-year-old patient with documented pre-excited atrial fibrillation (AF), consistent with a posteroseptal pathway location was referred for electrophysiological study and catheter ablation. The pathway was successfully ablated via the retrograde aortic route. An EnSite System noncontact balloon was deployed in the right atrium (RA) as part of a protocol evaluating RA conduction, for which ethics approval and patient’s informed consent have been obtained. Following ablation, adenosine 18 mg was injected intravenously. Six seconds later, onset of AF was observed, and after 2 more seconds ultra rapid activity was recorded in the