Henrique Doria de Vasconcellos1, Theingi Tiffany Win2, Ela Chamera1, Seo Young Hong1, Bharath Ambale Venkatesh1, Patrick Young1, Xiaoying Yang3, Luisa Ciuffo4, Ravi K Sharma1, Masamichi Imai1, Mohammadali Habibi1, Colin O Wud5, Susan R Heckbert6, David A Bluemke7, Joao A C Lima8. 1. Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, 600 N. Wolfe Street, Blalock 524, Baltimore, Maryland 21287-8222. 2. Division of Cardiology, Department of Medicine, University of New Mexico, Albuquerque, New Mexico. 3. Department of Statistics, The George Washington University, Washington, District of Columbia. 4. Division of Cardiology, Department of Medicine, Johns Hopkins University, Baltimore, United States. 5. Office of Biostatistics Research, National Heart, Lung, and Blood Institute, Bethesda, Maryland. 6. Department of Epidemiology, University of Washington, Seattle, Washington, District of Columbia. 7. Radiology and Imaging Sciences, NIH Clinical Center, Bethesda, Maryland. 8. Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, 600 N. Wolfe Street, Blalock 524, Baltimore, Maryland 21287-8222. Electronic address: jlima@jhmi.edu.
Abstract
RATIONALE AND OBJECTIVES: Left Atrial (LA) adverse remodeling is an important predictor of morbidity and mortality in several cardiovascular (CV) diseases. Our goals were to quantify and provide reference ranges for LA structure and function using feature tracking cine cardiac magnetic resonance. MATERIALS AND METHODS: 2526 participants of the Multiethnic Study of Atherosclerosis study who had feature tracking cine cardiac magnetic resonance derived LA data and were free of atrial fibrillation/flutter and prior CV events at year five follow-up examination (2010-2012) were included in this study. LA phasic indexed volumes: maximum (LAVi max), minimum (LAVi min), and preatrial contraction (LAVi preA); LA empty fractions: total, passive, and active (LAtEF, LApEF, and LAaEF); LA longitudinal strain: maximum and preatrial contraction (S max and S preA); and LA longitudinal strain rate: systolic (SR max) and early/late diastolic (SR e and SR a) were measured. Age, gender, and race/ethnicity-specific reference ranges were identified. Also, reference values in a select subgroup of healthy participants free of traditional CV risk factors at the time of exam date were reported. RESULTS: The mean ± SD for LAVi max, LAVi min, LAVi preA, S max, SR e, and SR a were in the 45-65-year-old participants: (33.8 ± 10 mL/m2), (14.5 ± 6.4 mL/m2), (24.8 ± 8.2 mL/m2), (34.6 ± 13.8 %), (-1.4 ± 0.7 s-1), (-2.1 ± 1 s-1) and in the ≥ 65-year-old participants: (35 ± 11.5 mL/m2), (16.6 ± 8.3 mL/m2), (27.6 ± 9.9 mL/m2), (31.2 ± 14.3 %), (-1 ± 0.6 s-1), (-2.1 ± 1 s-1) respectively. Younger individuals had Powered by Editorial Manager and ProduXion Manager from Aries Systems Corporation smaller LA volumes and better LA function compared to their older counterparts. Similar findings were observed in Chinese-Americans as compared to Whites. CONCLUSION: This study provides reference values of LA structure and function parameters from a healthy multiethnic community-based population aged 53-94 years evaluated by FTMRI.
RATIONALE AND OBJECTIVES: Left Atrial (LA) adverse remodeling is an important predictor of morbidity and mortality in several cardiovascular (CV) diseases. Our goals were to quantify and provide reference ranges for LA structure and function using feature tracking cine cardiac magnetic resonance. MATERIALS AND METHODS: 2526 participants of the Multiethnic Study of Atherosclerosis study who had feature tracking cine cardiac magnetic resonance derived LA data and were free of atrial fibrillation/flutter and prior CV events at year five follow-up examination (2010-2012) were included in this study. LA phasic indexed volumes: maximum (LAVi max), minimum (LAVi min), and preatrial contraction (LAVi preA); LA empty fractions: total, passive, and active (LAtEF, LApEF, and LAaEF); LA longitudinal strain: maximum and preatrial contraction (S max and S preA); and LA longitudinal strain rate: systolic (SR max) and early/late diastolic (SR e and SR a) were measured. Age, gender, and race/ethnicity-specific reference ranges were identified. Also, reference values in a select subgroup of healthy participants free of traditional CV risk factors at the time of exam date were reported. RESULTS: The mean ± SD for LAVi max, LAVi min, LAVi preA, S max, SR e, and SR a were in the 45-65-year-old participants: (33.8 ± 10 mL/m2), (14.5 ± 6.4 mL/m2), (24.8 ± 8.2 mL/m2), (34.6 ± 13.8 %), (-1.4 ± 0.7 s-1), (-2.1 ± 1 s-1) and in the ≥ 65-year-old participants: (35 ± 11.5 mL/m2), (16.6 ± 8.3 mL/m2), (27.6 ± 9.9 mL/m2), (31.2 ± 14.3 %), (-1 ± 0.6 s-1), (-2.1 ± 1 s-1) respectively. Younger individuals had Powered by Editorial Manager and ProduXion Manager from Aries Systems Corporation smaller LA volumes and better LA function compared to their older counterparts. Similar findings were observed in Chinese-Americans as compared to Whites. CONCLUSION: This study provides reference values of LA structure and function parameters from a healthy multiethnic community-based population aged 53-94 years evaluated by FTMRI.
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