Real-Time Three-Dimensional Echocardiography in the Evaluation of Left Atrial Structure and Function in Normal, Aging, Hypertensive and Heart Failure Patients: New Insights into Left Atrial Adaptation and Remodeling
Article Outline
SUMMARY
Background
Precise left atrial (LA) volume quantification, representative of LA function, is of extraordinary clinical prognostic value. However, a detailed description of pathophysiology in different disease populations and interactions with aging by real-time three-dimensional echocardiography (RT-3DE) is lacking.
Methods
This study consisted of three protocols: (1) to test the impact of different LA cutting planes on LA volume quantification in different disease populations (n = 61) by RT-3DE; (2) to examine the impact of aging, hypertension (n = 145), the interaction on LA remodeling; and (3) to further depict the LA regional and global remodeling process in different disease entities (n = 68), including heart failure (HF).
Results
Bias and percentage error in LA volume quantification tended to decrease significantly when compared with the automatic border detection method at eight cutting planes. A linear relationship was apparent between maximal LA volume and age in the hypertensive group (r = 0.26, p = 0.03), but not in the normal aging group (r = 0.16, p = 0.19). A significantly reduced pumping fraction and enlarged LA volume was observed in HF patients (p < 0.01), with a trend toward less LA pumping volume (p = 0.1).
Conclusion
Eight cut planes provided sufficient accuracy in LA volume quantification using the RT-3DE method. Compared with normal aging, LA volume tends to increase with higher pumping volume to compensate for impaired left ventricular relaxation in hypertension. Relatively preserved total LA pumping volume may exist in heart failure patients at the expense of further adaptive volume expansion with a subsequently reduced total emptying fraction.
Key Words: aging , heart failure , hypertension , left atrial function , remodeling , three-dimensional echocardiography
No full text is available. To read the body of this article, please view the PDF online.
References
- Left atrial diameter as an independent predictor of first clinical cardiovascular events in middle-aged and elderly adults: the Strong Heart Study (SHS) . Am Heart J . 2006;151:412–418
- . Left atrial volume, geometry, and function in systolic and diastolic heart failure of persons = 65 years of age (the Cardiovascular Health Study) . Am J Cardiol . 2006;97:83–89
- Prediction of cardiovascular outcomes with left atrial size: is volume superior to area or diameter? . J Am Coll Cardiol . 2006;47:1018–1023
- . Response of atrial fibrillation to therapy: role of etiology and left atrial diameter . J Electrocardiol . 1980;13:119–123
- . Coupled systolic-ventricular and vascular stiffening with age: implications for pressure regulation and cardiac reserve in the elderly . J Am Coll Cardiol . 1998;32:1221–1227
- Left atrial mechanical function in the healthy elderly: new insights from a combined assessment of changes in atrial volume and trans-mitral flow velocity . J Am Soc Echocardiogr . 1995;8:801–809
- . Relationship between left ventricular wall thickness and left atrial size: comparison with other measures of diastolic function . J Am Soc Echocardiogr . 1995;8:37–47
- . Compensatory changes in atrial volumes with normal aging: is atrial enlargement inevitable? . J Am Coll Cardiol . 2002;40:1630–1635
- High-resolution transthoracic realtime three-dimensional echocardiography: quantitation of cardiac volumes and function using semi-automatic border detection and comparison with cardiac magnetic resonance imaging . J Am Coll Cardiol . 2004;43:2083–2090
- Volumetric quantification of global and regional left ventricular function from real-time three-dimensional echocardiographic images . Circulation . 2005;112:1161–1170
- Impact of the number of image planes of real-time three-dimensional echocardiography on the accuracy of left atrial and ventricular volume measurements . Ultrasound Med Biol . 2008;34:40–46
- Efficient quantification of the left ventricular volume using 3-dimensional echocar-diography: the minimal number of equiangular long-axis images for accurate quantification of the left ventricular volume . J Am Soc Echocardiogr . 2007;20:373–380
- Rapid online quantification of left ventricular volume from real-time three-dimensional echocardiographic data . Eur Heart J . 2006;27:460–468
- . Use of real-time three-dimensional echocardiography to measure left atrial volume: comparison with other echocardiographic techniques . J Am Soc Echocardiogr . 2005;18:991–997
- Estimation of left ventricular chamber and stroke volume by limited M-mode echocardiog-raphy and validation by two-dimensional and Doppler echocardiography . Am J Cardiol . 1996;78:801–807
- . Assessment of left atrial volume and function by real-time three-dimensional echocardiog-raphy . Int J Cardiol . 2008;123:155–161
- . Relation of exercise capacity in dilated cardiomyopathy to left atrial size and systolic function . Am J Cardiol . 1992;70:825–827
- . Independent risk factors for atrial fibrillation in a population-based cohort: the Framingham Heart Study . JAMA . 1994;271:840–844
- Management of patients with atrial fibrillation: a statement for healthcare professionals from the Subcommittee on Electrocardiography and Electrophysiology, American Heart Association . Circulation . 1996;93:1262–1277
- Left atrial remodeling in patients younger than 70 years with diastolic and systolic heart failure . J Am Soc Echocardiogr . 2007;20:177–185
- . Mechanical function of the left atrium: new insights based on analysis of pressure-volume relations and Doppler echocardiography . Anesthesiology . 2003;98:975–994
- Effects of aging on left atrial reservoir, conduit, and booster pump function: a multi-institution acoustic quantification study . Heart . 2001;85:272–277
- . How to measure left atrial volume . Echocardiography . 2004;21:569–571
- Determinant of left atrial dilation in patients with hypertrophic cardiomyopathy: a real-time three-dimensional echocardiographic study . J Am Soc Echo-cardiogr . 2004;17:968–975
- Comparison of left atrial volume by two-dimensional echocardiography and cine-computed tomography . Am J Cardiol . 1995;75:754–757
- How much are atrial volumes and ejection fractions assessed by cardiac magnetic resonance imaging influenced by the ECG gating method? . J Cardiovasc Magn Reson . 2005;7:587–593
- Quantification of left ventricular volumes and ejection fraction using freehand transtho-racic three-dimensional echocardiography: comparison with magnetic resonance imaging . J Am Soc Echocar-diogr . 2003;16:101–109
- Left atrial volume measured by real-time 3-dimensional echocardiography predicts clinical outcomes in patients with severe left ventricular dysfunction and in sinus rhythm . J Am Soc Echocardiogr . 2008;21:439–445
- . Predictive value of normal left atrial volume in stress echocardiography . J Am Coll Cardiol . 2006;47:1024–1028
- Assessment of mitral annulus velocity by Doppler tissue imaging in the evaluation of left ventricular diastolic function . J Am Coll Cardiol . 1997;30:474–480
- . Approaching regional left atrial function by tissue Doppler velocity and strain imaging . Europace . 2008;10(Suppl 3):iii62–iii69
- . Regional atrial distensibility . Am J Physiol . 1992;262:H1536–H1560
PII: S1873-9598(09)70021-3
doi:10.1016/S1873-9598(09)70021-3
© 2009 Elsevier B.V. All rights reserved.
