{'fraction_non_alphanumeric': 0.025157232704402517, 'fraction_numerical': 0.013477088948787063, 'mean_word_length': 5.402298850574713, '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}}
Is Rhythm Control with Pulmonary Vein Isolation Superior to Rate Control with AV Nodal Ablation in Patients with Heart Failure?

This was a prospective, multicenter clinical trial in which 81 patients with symptomatic, drug-resistant atrial fibrillation, an ejection fraction of 40% or less, and New York Heart Association class II or III heart failure were randomized to undergo either catheter ablation for AF (n= 41) or atrioventricularnode ablation with biventricular pacing (n=40). Catheter ablation for AF primarily consisted of pulmonary vein isolation with or without additional atrial substrate modification. The primary end points were change in ejection fraction, 6-minute walk test and quality of life questionnaire in HF. All patients completed the Minnesota Living with Heart Failure questionnaire (scores range from 0 to 105, with a higher score indicating a worse quality of life) and underwent echocardiography and a 6-minute walk test (the composite primary end point). Over a 6-month period, patients were monitored for both symptomatic and asymptomatic episodes of atrial fibrillation. Results