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MINERVA CARDIOANGIOLOGICA

A Journal on Heart and Vascular Diseases


Official Journal of the Italian Society of Angiology and Vascular Pathology
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Minerva Cardioangiologica 2009 April;57(2):143-50

language: English

Atrial fibrillation and mild cognitive impairment: what correlation?

Puccio D. 1, Novo G. 1, Baiamonte V. 2, Nuccio A. 1, Fazio G. 1, Corrado E. 1, Coppola G. 1, Muratori I. 1, Vernuccio L. 3, Novo S. 1

1 Division of Cardiology Department of Internal Medicine and Cardiovascular Diseases University of Palermo, Palermo, Italy
2 Institute of Neuropsychiatry Department of Neurology University of Palermo, Palermo, Italy
3 Department of Internal Medicine and Emerging Disease, University of Palermo, Palermo, Italy


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Aim. Atrial fibrillation (AF), in addition to macroembolic complications, may also produce multiple cerebral ischemic areas due to microembolic phenomena and transient hypoperfusion, eventually leading to a progressive cognitive impairment and even to acclaimed vascular dementia. The aim of this study was to evaluate the prevalence of cognitive impairment in patients with AF. The reported results concern data obtained at the moment of recruitment.
Methods. The authors studied 42 patients with a history of non valvular AF (paroxysmal, persistent, recurrent or permanent) and 40 homogenous controls in sinus rhythm without previous AF. All subjects underwent anamnesis, physical examination, biochemical and instrumental tests. To investigate the cognitive status, subjects underwent the following neuropsychological rating scales: Mini Mental State Examination (MMSE), Clinical Dementia Rating Scale (CDR),Activity of Daily Living (ADL), Instrumental Activity of Daily Living (IADL) Global Deterioration Scale (GLDS), Geriatric Depression Scale (GDS) and Hachinski Ischemic Score (HIS).
Results. AF Patients had worse scores versus controls at GLDS (P=0.0001), HIS (P=0.001), CDR (P=0.07) and GDS (P=0.07); no significant differences were found for MMSE even after correction for age and education. AF patients treated with warfarin showed better scores at CDR (P=0.04),GLDS (P=0.03) and GDS (P=0.007), compared to those in aspirin-treatment. Corrected MMSE scores did not differ.
Conclusion. The authors identified a slight cognitive impairment in the AF group; patients with paroxysmal, persistent or recurrent AF showed worse cognitive performances than permanent ones, suggesting a possible microembolic pathogenesis. Anticoagulation therapy could play a protective role, however more evidence is needed.

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