Ventricular-arterial coupling in centenarians without cardiovascular diseases Journal Article

Authors: Sonaglioni, A.; Baravelli, M.; Lombardo, M.; Sommese, C.; Anza, C.; Kirk, J. A.; Padeletti, L.
Article Title: Ventricular-arterial coupling in centenarians without cardiovascular diseases
Abstract: BACKGROUND: Ventricular-arterial (VA) coupling is a central determinant of cardiovascular system performance and cardiac energetics. This index is expressed by the Ea/Ees ratio, where the effective arterial elastance (Ea) indicates the net arterial load exerted on the left ventricle and the left ventricular end-systolic elastance (Ees) is a load-independent measure of left ventricular chamber performance. METHODS: Thirty-three centenarians (100.6 +/- 1.2 years, range 99-105 years, 10 M) without cardiovascular diseases underwent a complete echocardiographic evaluation and an instantaneous arterial blood pressure measurement, to characterize the Ea/Ees ratio and its two determinants indexed to body surface area. RESULTS: VA coupling was markedly reduced (Ea/Ees ratio 0.40 +/- 0.1), reflecting a disproportionate increase in Ees index (8.5 +/- 2.2 mmHg/ml/m2) compared with Ea index (3.2 +/- 0.8 mmHg/ml/m2). Notably, the coupling ratio was significantly lower in women (0.37 +/- 0.1) than in men (0.45 +/- 0.1, p = 0.0003), due to an increase in Ees index significantly greater in women (9.4 +/- 1.9 mmHg/ml/m2) than in men (6.5 +/- 1.5 mmHg/ml/m2, p = 0.0002). Using multivariate regression analysis, only female gender (beta coefficient -0.04, p = 0.01) and relative wall thickness (beta coefficient -0.49, p lt; 0.0001) showed a significant inverse correlation to VA coupling. CONCLUSIONS: Our analysis in a population of centenarians without overt cardiovascular disease revealed very low values of VA coupling, especially in women. Both a LV structural remodeling as well as a high aortic elastance might have contributed to a secondary disproportionate increase in myocardial stiffness.
Keywords: Cell and Molecular Physiology; Centenarians; Echocardiographic evaluation; Ventricular-arterial coupling
Journal Title: Aging clinical and experimental research
ISSN: 1720-8319; 1594-0667
Publisher: Unknown  
Journal Place: Germany
Date Published: 2017
Language: eng
Notes: LR: 20170615; JID: 101132995; OTO: NOTNLM; 2017/01/23 [received]; 2017/05/30 [accepted]; aheadofprint