Subclinical atrial fibrillation: when to give NAO?

European Heart Journal Supplements : Journal of the European Society of Cardiology
Giuseppe Patti, Alessandro Sticchi

Abstract

Atrial fibrillation is defined as subclinical (SAF) when occurs without symptoms and is discovered only during the interrogation of permanent or temporary cardiac implantable devices. The significant interest in this condition derives from the fact that could easily be otherwise undiagnosed, portending to a potential serious neurological and cardiovascular consequences. The diagnosis of SAF is important for both the primary form and for patients after a stroke, and an appropriate management of antithrombotic treatment becomes a central instrument of prevention. Atrial fibrillation carries a five times increase in the thromboembolic risk. The subclinical asymptomatic forms of atrial tachyarrhythmias and fibrillation, diagnosed by interrogation of implantable cardiac devices, foretell a non-irrelevant risk of stroke, significantly higher than the one for patients without rhythm disturbances. Regardless the cause, the long-lasting asymptomatic arrhythmias, in patients with a significant risk profile, predict more important consequences and can justify anticoagulant treatment, also in primary prevention settings.

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