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- W4317761648 abstract "Atrial standstill (AS) is a rare condition characterized by absence of electrical activity within the atria. Studies to date have been limited.The authors sought to describe the clinical characteristics, genetics, and outcomes of patients with AS.This was a retrospective multicenter study of patients <18 years at AS diagnosis, defined as absence of atrial activity documented during an electrophysiology study, device placement, or noninvasive rhythm tracings and confirmed by echocardiogram. Patients with acquired disorders were excluded. Clinical details and genetic variants were recorded and analyzed.Twenty patients were diagnosed at a median age of 6.6 years (IQR: 2.9-10.8 years). Arrhythmias included 16 (80%) with atrial/supraventricular arrhythmias and 8 (40%) with ventricular tachycardia, including 4 with cardiac arrests. A type 1 Brugada pattern was documented in 4. Pacemakers were implanted in 18 (90%). Although atrial leads were attempted in 15, only 4 achieved pacing at implantation. During a median follow-up of 6.9 years (IQR: 1.2-13.3 years), 7 (35%) had thromboembolic events. Of these, none had atrial pacing, 6 were not on anticoagulation, and 1 was on aspirin. Genetic testing identified SCN5A variants in 13 patients (65%). Analyses suggest SCN5A loss-of-function may be one mechanism driving AS. Ventricular arrhythmias and cardiac arrest were more commonly seen in patients with biallelic SCN5A variants.AS may be associated with loss-of-function SCN5A variants. Patients demonstrate atrial and ventricular arrhythmias, and may present challenges during device placement. Patients without the capacity for atrial pacing are at risk for thromboembolic events and warrant anticoagulation." @default.
- W4317761648 created "2023-01-23" @default.
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- W4317761648 date "2023-01-01" @default.
- W4317761648 modified "2023-09-26" @default.
- W4317761648 title "Device-Related Thrombus After Left Atrial Appendage Occlusion" @default.
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- W4317761648 doi "https://doi.org/10.1016/j.jacep.2022.11.029" @default.
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