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Altered diastolic function and aortic stiffness in Alzheimer’s disease

Authors Çalik AN, Özcan K, Yüksel G, Güngör B, Aruğarslan E, Varlibas F, Ekmekci A, Osmonov D, Tatlısu MA, Karaca M, Bolca O, Erdinler İ

Received 2 March 2014

Accepted for publication 12 April 2014

Published 16 July 2014 Volume 2014:9 Pages 1115—1121


Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 4

Ali Nazmi Çalik,3 Kazim Serhan Özcan,4 Gülbün Yüksel,2 Baris Güngör,1 Emre Arugarslan,1 Figen Varlibas,2 Ahmet Ekmekci,1 Damirbek Osmonov,1 Mustafa Adem Tatlisu,1 Mehmet Karaca,1 Osman Bolca,1 Izzet Erdinler1

1Department of Cardiology, Siyami Ersek Cardiovascular and Thoracic Surgery Center, Istanbul, Turkey; 2Department of Neurology, Haydarpasa Numune Training and Research Hospital, Istanbul, Turkey; 3Department of Cardiology, Yozgat State Hospital, Yozgat, Turkey; 4Department of Cardiology, Derince Training and Research Hospital, Kocaeli, Turkey

Background: Alzheimer’s disease (AD) is closely linked to cardiovascular risk factors.
Methods: Echocardiographic studies were performed, including left ventricular diastolic functions, left and right atrial conduction times, and arterial stiffness parameters, namely stiffness index, pressure-strain elastic modulus, and distensibility, on 29 patients with AD and
24 age-matched individuals with normal cognitive function.
Results: The peak mitral flow velocity of the early rapid filling wave (E) was lower, and the peak velocity of the late filling wave caused by atrial contraction (A), deceleration time of peak E velocity, and isovolumetric relaxation time were higher in the AD group. The early myocardial peak (Ea) velocity was significantly lower in AD patients, whereas the late diastolic (Aa) velocity and E/Ea ratio were similar between the two groups. In Alzheimer patients, stiffness index and pressure-strain elastic modulus were higher, and distensibility was significantly lower in the AD group compared to the control. Interatrial electromechanical delay was significantly longer in the AD group.
Conclusion: Our findings suggest that patients with AD are more likely to have diastolic dysfunction, higher atrial conduction times, and increased arterial stiffness compared to the controls of same sex and similar age.

Keywords: diastolic dysfunction, atrial conduction time

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