{'fraction_non_alphanumeric': 0.03275109170305677, 'fraction_numerical': 0.009825327510917031, 'mean_word_length': 4.73125, '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}}
Are Dual‐Coil ICD Leads Obsolete?

The wide use of dual-coil defibrillation leads (with an electrode in the superior vena cava [SVC]/right atrium region) appears based on the historical development of implantable cardioverter defibrillator (ICD) technology, force of habit, and the belief that some acute studies have shown their superiority over single-lead leads.1 Dual-coil leads are still commonly used despite advances in ICD technology such as an active can and biphasic waveforms. In the past dual-coil leads were utilized in about 90% of ICD systems in the United States, but the trend is now toward more single-coil systems with dual-coil leads accounting for about 60–65% of implantations. It is likely that within a year or two, the percentage of dual-coil leads will drop to 50% or less. What is the cause in this shift in clinical practice and what is the current role of dual-coil defibrillation leads?