Normalization for body size and population-attributable risk of left ventricular hypertrophy

The Strong Heart Study

Giovanni De Simone, Jorge Kizer, Marcello Chinali, Mary J. Roman, Jonathan N. Bella, Lyle G. Best, Elisa T. Lee, Richard B. Devereux

Research output: Contribution to journalArticle

150 Citations (Scopus)

Abstract

Background: Left ventricular hypertrophy (LVH) is identified by left ventricular mass (LVM) normalized by body surface area (BSA) or height (in meters) also raised to allometric powers. The presence of LVH detected by these indices predicts increased cardiovascular (CV) events. Whether different indexations of LVH differ in their ability to predict excess risk is unknown. Methods: A total of 2400 subjects, (1589 women and 811 men), 59 ± 8 years of age and without prevalent CV disease, valve disease or wall motion abnormalities and high prevalence of obesity were followed for an average of 86 months. Reference values (mean ± 1.96 SD) for LVM/BSA, LVM/BSA 1.5, LVM/m, LVM/m2.7, and LVM/m2.13 were obtained in 251 normal participants and population-attributable risk percent (PAR%) for fatal and nonfatal CV events were calculated from prevalence of LVH and hazard ratios (HR). Results: In the entire population or in hypertensive participants, prevalence of LVH was higher for LVM/m2.7 (20% and 28%) and LVM/m2.13 (18% and 25%) than for BSA (7% and 11%). Age and sex-adjusted PAR% for LVM/m2.7 or LVM/m2.13 were on average 1.8-fold greater than for LVM/BSA in the entire population, and 1.6-fold greater in hypertensive participants, differences that were statistically significant. Conclusions: The presence of LVH identified by LVM normalized for height to allometric powers is associated with a higher proportion of incident CV events than is LVH detected by normalization for BSA and is convenient for identification of individuals at high risk and in need of preventive intervention in populations with high prevalence of obesity. Allometric power methods allow detection of prognostically adverse, obesity-related LVH, which is unidentified using BSA.

Original languageEnglish (US)
Pages (from-to)191-196
Number of pages6
JournalAmerican Journal of Hypertension
Volume18
Issue number2
DOIs
StatePublished - Feb 2005
Externally publishedYes

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Body Size
Left Ventricular Hypertrophy
Body Surface Area
Population
Obesity
Reference Values
Cardiovascular Diseases

Keywords

  • Arterial hypertension
  • Cardiovascular risk
  • Echocardiography
  • Obesity
  • Prognosis
  • Risk factors

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

Cite this

Normalization for body size and population-attributable risk of left ventricular hypertrophy : The Strong Heart Study. / De Simone, Giovanni; Kizer, Jorge; Chinali, Marcello; Roman, Mary J.; Bella, Jonathan N.; Best, Lyle G.; Lee, Elisa T.; Devereux, Richard B.

In: American Journal of Hypertension, Vol. 18, No. 2, 02.2005, p. 191-196.

Research output: Contribution to journalArticle

De Simone, Giovanni ; Kizer, Jorge ; Chinali, Marcello ; Roman, Mary J. ; Bella, Jonathan N. ; Best, Lyle G. ; Lee, Elisa T. ; Devereux, Richard B. / Normalization for body size and population-attributable risk of left ventricular hypertrophy : The Strong Heart Study. In: American Journal of Hypertension. 2005 ; Vol. 18, No. 2. pp. 191-196.
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abstract = "Background: Left ventricular hypertrophy (LVH) is identified by left ventricular mass (LVM) normalized by body surface area (BSA) or height (in meters) also raised to allometric powers. The presence of LVH detected by these indices predicts increased cardiovascular (CV) events. Whether different indexations of LVH differ in their ability to predict excess risk is unknown. Methods: A total of 2400 subjects, (1589 women and 811 men), 59 ± 8 years of age and without prevalent CV disease, valve disease or wall motion abnormalities and high prevalence of obesity were followed for an average of 86 months. Reference values (mean ± 1.96 SD) for LVM/BSA, LVM/BSA 1.5, LVM/m, LVM/m2.7, and LVM/m2.13 were obtained in 251 normal participants and population-attributable risk percent (PAR{\%}) for fatal and nonfatal CV events were calculated from prevalence of LVH and hazard ratios (HR). Results: In the entire population or in hypertensive participants, prevalence of LVH was higher for LVM/m2.7 (20{\%} and 28{\%}) and LVM/m2.13 (18{\%} and 25{\%}) than for BSA (7{\%} and 11{\%}). Age and sex-adjusted PAR{\%} for LVM/m2.7 or LVM/m2.13 were on average 1.8-fold greater than for LVM/BSA in the entire population, and 1.6-fold greater in hypertensive participants, differences that were statistically significant. Conclusions: The presence of LVH identified by LVM normalized for height to allometric powers is associated with a higher proportion of incident CV events than is LVH detected by normalization for BSA and is convenient for identification of individuals at high risk and in need of preventive intervention in populations with high prevalence of obesity. Allometric power methods allow detection of prognostically adverse, obesity-related LVH, which is unidentified using BSA.",
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AU - De Simone, Giovanni

AU - Kizer, Jorge

AU - Chinali, Marcello

AU - Roman, Mary J.

AU - Bella, Jonathan N.

AU - Best, Lyle G.

AU - Lee, Elisa T.

AU - Devereux, Richard B.

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KW - Echocardiography

KW - Obesity

KW - Prognosis

KW - Risk factors

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