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The impact of age on cardiac electromechanical function in asymptomatic individuals
Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Cardiology. Molecular & Clinical Sciences Research Institute, St George University, London, UK; Brunel University, London, UK.
2018 (English)In: Echocardiography, ISSN 0742-2822, E-ISSN 1540-8175, Vol. 35, no 11, p. 1788-1794Article in journal (Refereed) Published
Abstract [en]

Background and Aim: Whether aging affects left ventricular (LV) filling and ejection and the LV electric function is not well established. We investigated the effect of normal aging on echocardiographic measurements of LV morphology and function, LV electric function and the relationship between LV electric and mechanical func-tion in asymptomatic individuals.

Methods: As part of a cross-sectional survey for the prevalence of coronary risk fac-tors in the general population in Caltanissetta, Italy, individuals without signs or symptoms of coronary artery disease or heart failure were randomly selected and underwent electrocardiographic and echocardiographic examination. QRS duration and amplitude, PR, QT and QTc intervals, were automatically measured. Echocardiographic examination included the measurement of LV systolic and dias-tolic dimensions, volumes and ejection fraction (EF). From the spectral Doppler flow LV early diastolic (E wave) and atrial systolic (A wave) velocities, isovolumic relaxation time (IVRT) and isovolumic contraction time (IVCT) were measured. Global LV dys-synchrony was assessed using the total isovolumic time (T-IVT) and the Tei index.

Results: Aging reduced LV long-axis function, LV filling time and E wave velocity and prolonged T-IVT, IVRT and Tei index. It did not affect LV dimensions, ejection frac-tion, IVCT or QRS amplitude and duration. QRS duration correlated with LV dimen-sions, wall thickness and left atrial area. QRS amplitude and QTc interval correlated with the markers of LV dyssynchrony T-IVT and Tei index.

Conclusions: Overall, systolic and electric LV function are not affected by age, whereas subendocardial function, diastolic and synchronous function are signifi-cantly influenced.

Place, publisher, year, edition, pages
Wiley-Blackwell, 2018. Vol. 35, no 11, p. 1788-1794
National Category
Cardiac and Cardiovascular Systems
Identifiers
URN: urn:nbn:se:umu:diva-153654DOI: 10.1111/echo.14145ISI: 000449697000011PubMedID: 30239038OAI: oai:DiVA.org:umu-153654DiVA, id: diva2:1265966
Available from: 2018-11-26 Created: 2018-11-26 Last updated: 2019-05-17Bibliographically approved

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Henein, Michael

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