Left atrial volume as an index of left atrial size: A population-based study

Allison M. Pritchett, Steven J. Jacobsen, Douglas W. Mahoney, Richard J. Rodeheffer, Kent R. Bailey, Margaret M. Redfield

Research output: Contribution to journalArticle

434 Scopus citations

Abstract

OBJECTIVES: We studied left atrial volume (LAV) as an index of atrial size. BACKGROUND: Increased left atrial dimension (LAD) measured by M-mode echocardiography is a risk factor for atrial fibrillation, stroke, and death. METHODS: A random sample of residents of Olmsted County, Minnesota, age ≥45 years (n = 2,042) underwent Doppler echocardiography with assessment of LAD and LAV. A subgroup of the population (n = 767) with no cardiovascular disease and normal systolic and diastolic function was used to develop reference ranges for LAD and LAV. In the total population, the prevalence of left atrial enlargement and the association between cardiovascular disease and left atrial size as determined by both indexes were assessed. RESULTS: In the normal subgroup, both indexes were associated with gender and body size, thus models controlling for body size were used to determine gender-specific reference ranges for LAD and LAV. In the total population, left atrial enlargement was common, with a prevalence of 18% (men) and 12% (women) using LAD/body surface area (BSA) and of 16% (men and women) using LAV/BSA. The agreement between the indexes was only fair (kappa = 0.53). Adjusting for age and gender, LAV/BSA was more strongly associated with the presence of cardiovascular diseases than LAD/BSA. CONCLUSIONS: We described a simple technique of measuring LAV, examined methods for indexing LAV, and described its normal range in a large, healthy reference cohort. Further, we find that in the community, left atrial enlargement is common and reflects the burden of cardiovascular disease.

Original languageEnglish (US)
Pages (from-to)1036-1043
Number of pages8
JournalJournal of the American College of Cardiology
Volume41
Issue number6
DOIs
StatePublished - Mar 19 2003

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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