Sibling correlation of left ventricular mass and geometry in hypertensive African Americans and whites: The HyperGEN study

Donna K. Arnett, Yuling Hong, Jonathan N. Bella, Al Oberman, Dalane W. Kitzman, Paul N. Hopkins, Dabeeru C. Rao, Richard B. Devereux

Research output: Contribution to journalArticle

60 Scopus citations

Abstract

Background: Evidence suggests that left ventricular (LV) mass is under genetic control, independently of risk factors known to influence LV size and geometry. Methods: As part of the HyperGEN study, four field centers recruited African American and white hypertensive siblings (n = 1664), aged 23 to 87 years. Two-dimensionally guided M-mode echocardiography was performed, and LV mass and relative wall thickness (RWT) were measured at a central reading center. Familial correlations were calculated separately for each ethnic group using maximum likelihood methods, adjusted for the potential confounding influences of age, gender, systolic blood pressure, and obesity. Results: In African Americans, brother-sister, brother-brother, and sister-sister correlation coefficients and standard errors for LV mass were 0.29 (0.08), 0.44 (0.10), and 0.33 (0.05). In whites, the corresponding correlations were lower than in African Americans at 0.05 (0.08), 0.12 (0.11), and 0.22 (0.09), respectively. Sibling correlation of LV geometry, assessed by RWT, was less in African Americans than in whites: brother-sister, 0.04 (0.10) v 0.21 (0.10), brother-brother, 0.12 (0.22) v 0.28 (0.09), and sister-sister, 0.11 (0.07) v 0.19 (0.11). Conclusions: LV mass is strongly correlated in hypertensive African American siblings, and modestly correlated in their white counterparts, whereas RWT has stronger sibling correlation in whites. The patterns of familial correlation of echocardiographic LV mass and RWT suggest that the genetic underpinnings of LV hypertrophy and geometric remodeling may differ among ethnic groups.

Original languageEnglish
Pages (from-to)1226-1230
Number of pages5
JournalAmerican Journal of Hypertension
Volume14
Issue number12
DOIs
StatePublished - Dec 31 2001

Keywords

  • Echocardiography
  • Heritability
  • Left ventricular hypertrophy
  • Race
  • Remodeling

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