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Effects of the Aging Process on Left Ventricular Systolic and Diastolic Synchronicity Indexes: Insights From 160 "Completely" Healthy Volunteers

Cited 2 time in Web of Science Cited 3 time in Scopus
Authors
Kim, Hyung-Kwan; Sohn, Dae-Won; Chang, Sung-A; Park, Keun-Ho; Kim, Yong-Jin; Park, Young-Bae; Oh, Byung-Hee; Park, Jin-Shik
Issue Date
2010-12
Publisher
JOHN WILEY & SONS INC
Citation
CLINICAL CARDIOLOGY; Vol.33, 12; E24-E31
Abstract
Background: Growing attempt to use left ventricular (LV) systolic (LVSIsys) and diastolic (LVSIdia) synchronicity indexes in the process of selecting potential responders to cardiac resynchronization therapy has created a need for normative reference values. Hypothesis: This study sought: (1) to determine normal reference ranges for LVSIsys and LVSIdia, and (2) to assess their relationships to age and conventional parameters reflecting LV systolic and diastolic functions. Methods: We recruited 160 healthy volunteers (104 men) free of any systemic or cardiovascular disease. Maximal difference and standard deviation of time to peak systolic and peak early diastolic myocardial velocities for LVSIsys and LVSIdia were measured using 6 and 12 segment models. Results: Normal ranges for LVSIsys and LVSIdia obtained in this study were slightly higher than previously reported. The normal aging process did not significantly change LVSIsys, whereas LVSIdia progressively and consistently increased with age. Significant correlations were observed between LVSIdia and parameters representing LV diastolic function, that is, early mitral inflow velocity and its deceleration time, and early mitral annulus velocity. A physiologic increase in LV mass/Ht(2.7) showed a weak, but significant correlation with LVSIdia (r = 0.15-0.22), but not with LVSIsys. On multivariate analysis, an age-dependent increase in LVSIdia was confirmed. Conclusions: In this study, we propose age-specific reference ranges for LVSIsys and LVSIdia. LVSIsys remains stable throughout age groups, whereas LVSIdia progressively increases with age. We believe that the reference values provided here will be useful for defining abnormal LV synchronous contraction and relaxation.
ISSN
0160-9289
Language
English
URI
http://hdl.handle.net/10371/77789
DOI
https://doi.org/10.1002/clc.20477
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College of Medicine/School of Medicine (의과대학/대학원)Internal Medicine (내과학전공)Journal Papers (저널논문_내과학전공)
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