@article {875, title = {Left atrial volume, geometry, and function in systolic and diastolic heart failure of persons > or =65 years of age (the cardiovascular health study).}, journal = {Am J Cardiol}, volume = {97}, year = {2006}, month = {2006 Jan 01}, pages = {83-9}, abstract = {

The left atrium enlarges in association with many factors, including aging, atrial fibrillation, hypertension, diastolic dysfunction, and heart failure (HF) with low ejection fraction. However, left atrial (LA) volume, geometry, and emptying have not been compared between diastolic and systolic HF, nor has the association of LA volume for new HF been determined in older subjects, many of whom have normal ejection fraction. We used echocardiography to measure the LA volume, geometry, and emptying in 851 community-dwelling subjects > or =65 years of age, including 180 with HF at baseline and 255 participants who subsequently developed HF. The LA volume, area, and linear dimensions were higher in the prevalent and incident HF groups than in controls and did not differ between those with systolic versus diastolic HF, independent of co-morbidities and Doppler measures of diastolic function. The fractional area change was associated with prevalent, but not incident, HF. In conclusion, in population-based older subjects, the LA size is increased and LA emptying decreased in patients with either systolic or diastolic HF. LA size is associated with the new development of HF. These findings highlight the important role of the left atrium in HF, with or without a decreased ejection fraction.

}, keywords = {Aged, Atrial Function, Left, Case-Control Studies, Diastole, Echocardiography, Female, Heart Atria, Heart Failure, Humans, Male, Multivariate Analysis, Systole}, issn = {0002-9149}, doi = {10.1016/j.amjcard.2005.07.126}, author = {Gottdiener, John S and Kitzman, Dalane W and Aurigemma, Gerard P and Arnold, Alice M and Manolio, Teri A} } @article {1136, title = {Left atrial volume and geometry in healthy aging: the Cardiovascular Health Study.}, journal = {Circ Cardiovasc Imaging}, volume = {2}, year = {2009}, month = {2009 Jul}, pages = {282-9}, abstract = {

BACKGROUND: The left atrium is a validated marker of clinical and subclinical cardiovascular disease. Left atrial enlargement is often seen among older individuals; however, there are few population-based data regarding normal left atrial size among older persons, especially from those who are healthy, and from women. Furthermore, because the left atrium is a 3D structure, the commonly used parasternal long-axis diastolic diameter often underdiagnoses left atrial enlargement.

METHODS AND RESULTS: We evaluated left atrial size in 230 healthy participants (mean age, 76+/-5 years) free of prevalent cardiac disease, rhythm abnormality, hypertension, and diabetes selected from the Cardiovascular Health Study, a prospective community-based study of risk factors for cardiovascular disease in 5888 elderly participants. In addition to the standard long-axis measurement, we obtained left atrial superoinferior and lateral diameters and used these dimensions to estimate left atrial volume. These measurements were used to generate reference ranges for determining left atrial enlargement in older men and women, based on the 95\% percentiles of the left atrial dimensions in healthy participants, both unadjusted, and after adjustment for age, height, and weight. In healthy elderly subjects, indices of left atrial size do not correlate with age or height but with weight and other measures of body build.

CONCLUSIONS: These data provide normative reference values for left atrial size in healthy older women and men. The results should be useful for refining diagnostic criteria for left atrial dilation in the older population and may be relevant for cardiovascular risk stratification.

}, keywords = {Age Factors, Aged, Aged, 80 and over, Aging, Atrial Function, Left, Body Size, Body Surface Area, Echocardiography, Three-Dimensional, Female, Heart Atria, Humans, Linear Models, Male, Models, Biological, Organ Size, Population Surveillance, Prospective Studies, Reference Values, Sex Factors, United States}, issn = {1942-0080}, doi = {10.1161/CIRCIMAGING.108.826602}, author = {Aurigemma, Gerard P and Gottdiener, John S and Arnold, Alice M and Chinali, Marcello and Hill, Jeffrey C and Kitzman, Dalane} }