Clinical Outcomes and Characteristics With Dofetilide in Atrial Fibrillation Patients Considered for Implantable Cardioverter-Defibrillator
| Autor: | Bruce D. Lindsay, Niraj Varma, Bruce L. Wilkoff, Walid Saliba, Mina K. Chung, Mandeep Bhargava, Patrick J. Tchou, Khaldoun G. Tarakji, Thomas Callahan, Ryan J. Koene, Mohamed Kanj, Oussama M. Wazni, John Rickard, David O. Martin, Bryan Baranowski, Vivek Menon, Mark Niebauer, Ayman A. Hussein, Daniel J. Cantillon, Thomas Dresing |
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| Rok vydání: | 2020 |
| Předmět: |
Male
medicine.medical_specialty Time Factors Databases Factual medicine.medical_treatment Electric Countershock Cardiomyopathy Dofetilide Ventricular Function Left Ventricular Dysfunction Left Heart Rate Recurrence Physiology (medical) Internal medicine Atrial Fibrillation Phenethylamines medicine Humans In patient Aged Retrospective Studies Sulfonamides Ejection fraction business.industry Stroke Volume Atrial fibrillation Recovery of Function Middle Aged medicine.disease Implantable cardioverter-defibrillator Defibrillators Implantable Treatment Outcome Cardiology Female Cardiology and Cardiovascular Medicine business Anti-Arrhythmia Agents medicine.drug |
| Zdroj: | Circulation: Arrhythmia and Electrophysiology. 13 |
| ISSN: | 1941-3084 1941-3149 |
| DOI: | 10.1161/circep.119.008168 |
| Popis: | Background: Dofetilide is one of the only anti-arrhythmic agents approved for atrial fibrillation (AF) in patients with reduced left ventricular ejection fraction (LVEF). However, postapproval data and safety outcomes are limited. In this study, we assessed the incidence and predictors of LVEF improvement, safety, and outcomes in patients with AF with LVEF ≤35% without prior implantable cardioverter defibrillator, cardiac resynchronization therapy, or AF ablation. Methods: An analysis of 168 consecutive patients from 2007 to 2016 was performed. Incidences of adverse events, drug continuation, implantable cardioverter defibrillator and cardiac resynchronization therapy implantation, LVEF improvement (>35%) and recovery (≥50%), AF recurrence, and AF ablation were determined. Multivariable regression analysis to identify predictors of LVEF improvement/recovery was performed. Results: The mean age was 64±12 years. Dofetilide was discontinued before hospital discharge in 46 (27%) because of QT prolongation (14%), torsades de pointe or polymorphic ventricular tachycardia/fibrillation (6% [sustained 3%, nonsustained 3%]), ineffectiveness (5%), or other causes (3%). At 1 year, 43% remained on dofetilide. Freedom from AF was 42% at 1 year, and 40% underwent future AF ablation. LVEF recovered (≥50%) in 45% and improved to >35% in 73%. Predictors of LVEF improvement included presence of AF during echocardiogram (odds ratio, 4.22 [95% CI, 1.71–10.4], P =0.002), coronary artery disease (odds ratio, 0.35 [95% CI, 0.16–0.79], P =0.01), left atrial diameter (odds ratio, 0.52 per 1 cm increase [95% CI, 0.30–0.90], P =0.01), and LVEF (odds ratio, per 1% increase, 1.09 [95% CI, 1.02–1.16], P =0.006). The C statistic was 0.78. Conclusions: In patients with LVEF ≤35%, who are potential implantable cardioverter defibrillator candidates, treated with dofetilide as an initial anti-arrhythmic strategy for AF, drug discontinuation rates were high, and many underwent future AF ablation. However, most patients had improvement in LVEF, obviating the need for primary prevention implantable cardioverter defibrillator. |
| Databáze: | OpenAIRE |
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