Abstract 16295: Echocardiographic Left Ventricular Measures Using the Area-Length Method: Normative Data by Gender and Race/Ethnicity From the Texas Adolescent Athlete Screening Registry (TAAHSR)
Background: Accurate determination of LV volume and mass in the young is crucial for evaluation and management of cardiovascular disease. Normative values are essential to interpretation but existing 2D-Echo data utilizing the area-length (bullet) method to use as reference values are limited in size and ethnic diversity. The aim of this study is to report normative values for LV measures in a healthy adolescent athlete population.
Methods: TAAHSR uses data from large-scale community-based screenings for athletes 14-18 years of age where demographics, cardiac history, 12-lead ECG and limited 2D-Echo are obtained. From 03/2010 through 12/2011, a total of 3,181 participants were screened and enrolled in TAAHSR. LV measurements performed utilizing the area-length method included: End-systolic volume (LVESV), end-diastolic volume (LVEDV), mass (LV mass) and ejection fraction (LVEF). Values corresponding to the 2nd, 50th and 98th percentile were calculated and exact, binomial 95% confidence intervals were calculated. Volume data were expressed in mL/m2BSA and mass in g/m2BSA.
Results: Data from 542 participants were analyzed (70% males; 70% White, 12% Hispanic and 11% Black). Values for specific measures are shown in the table.
The distribution for LV mass and LVEDV in Blacks was significantly greater than in Whites. The 50th percentile of LV mass in blacks was 69.7 g/m2BSA compared with 64.8 g/m2BSA in Whites (p<0.05). In general, LV volumes were higher in this population of young athletes compared to previously published data.
Conclusions: These data show racial/ethnic differences in the distributions of LV volumes and mass among teenage athletes. Existing area-length echocardiographic normative data may need to be updated, particularly to consider race/ethnicity.
- © 2013 by American Heart Association, Inc.