TY - JOUR
T1 - Determinants and prognostic value of left atrial volume in patients with dilated cardiomyopathy
AU - Rossi, Andrea
AU - Cicoira, Mariantonietta
AU - Zanolla, Luisa
AU - Sandrini, Rita
AU - Golia, Giorgio
AU - Zardini, Piero
AU - Enriquez-Sarano, Maurice
PY - 2002/10/16
Y1 - 2002/10/16
N2 - OBJECTIVES: We aimed to investigate the determinants of left atrial (LA) volume and its prognostic value in patients with dilated cardiomyopathy (DCM). BACKGROUND: Enlargement of the LA is a marker of mortality in the general population. Patients with DCM are characterized by a wide range of LA sizes, but the clinical role of this observation has been played down. METHODS: A complete echocardiographic Doppler examination was performed in 337 patients (age 60 ± 13 years; 84% male) with the diagnosis of DCM. Left atrial maximal volume (LAmax) was measured at left ventricular (LV) end systole (four-chamber view; area-length method). Left ventricular end-diastolic and end-systolic volumes (LVEDV and LVESV) and ejection fraction (EF) were also measured. Mitral regurgitation (MR) was graded using a 5-point scale. Mitral E-wave (E) and A-wave (A) velocities, as well as their ratio (E/A), were measured off-line. RESULTS: Determinants of LAmax were: atrial fibrillation (r = 0.34, p < 0.0001), LVEDV (r = 0.46, p < 0.0001), EF (r = 0.40, p < 0.0001), MR (r = 0.39, p < 0.0001), and E/A ratio (r = 0.36, p < 0.0001). During follow-up (41 ± 29 months), 77 patients died and 12 underwent heart transplantation. Univariate Cox analysis showed that LAmax (hazard ratio [HR] 1.01, 95% confidence interval [CI] 1.007-1.013, p < 0.0001), LVESV (HR 1.003, CI 1.001-1.005, p = 0.0003), E/A ratio (HR 1.6, CI 1.3-2.005, p < 0.0001), and MR (HR 1.21, CI 1.03-1.44, p = 0.02) were related to the outcome. On bivariate Cox analysis, LAmax predicted the prognosis independently of each determinant. Patients with a larger LA volume (LAmax/m2 >68.5 ml/m2) had a risk ratio of 3.8 compared with those with a smaller LA volume. CONCLUSIONS: In patients with DCM, LA volume is associated with LV remodeling, diastolic dysfunction, and the degree of MR. The maximal volume of the LA has an independent and incremental prognostic value, compared with all its determinants.
AB - OBJECTIVES: We aimed to investigate the determinants of left atrial (LA) volume and its prognostic value in patients with dilated cardiomyopathy (DCM). BACKGROUND: Enlargement of the LA is a marker of mortality in the general population. Patients with DCM are characterized by a wide range of LA sizes, but the clinical role of this observation has been played down. METHODS: A complete echocardiographic Doppler examination was performed in 337 patients (age 60 ± 13 years; 84% male) with the diagnosis of DCM. Left atrial maximal volume (LAmax) was measured at left ventricular (LV) end systole (four-chamber view; area-length method). Left ventricular end-diastolic and end-systolic volumes (LVEDV and LVESV) and ejection fraction (EF) were also measured. Mitral regurgitation (MR) was graded using a 5-point scale. Mitral E-wave (E) and A-wave (A) velocities, as well as their ratio (E/A), were measured off-line. RESULTS: Determinants of LAmax were: atrial fibrillation (r = 0.34, p < 0.0001), LVEDV (r = 0.46, p < 0.0001), EF (r = 0.40, p < 0.0001), MR (r = 0.39, p < 0.0001), and E/A ratio (r = 0.36, p < 0.0001). During follow-up (41 ± 29 months), 77 patients died and 12 underwent heart transplantation. Univariate Cox analysis showed that LAmax (hazard ratio [HR] 1.01, 95% confidence interval [CI] 1.007-1.013, p < 0.0001), LVESV (HR 1.003, CI 1.001-1.005, p = 0.0003), E/A ratio (HR 1.6, CI 1.3-2.005, p < 0.0001), and MR (HR 1.21, CI 1.03-1.44, p = 0.02) were related to the outcome. On bivariate Cox analysis, LAmax predicted the prognosis independently of each determinant. Patients with a larger LA volume (LAmax/m2 >68.5 ml/m2) had a risk ratio of 3.8 compared with those with a smaller LA volume. CONCLUSIONS: In patients with DCM, LA volume is associated with LV remodeling, diastolic dysfunction, and the degree of MR. The maximal volume of the LA has an independent and incremental prognostic value, compared with all its determinants.
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U2 - 10.1016/S0735-1097(02)02305-7
DO - 10.1016/S0735-1097(02)02305-7
M3 - Article
C2 - 12392832
AN - SCOPUS:0037120959
SN - 0735-1097
VL - 40
SP - 1425
EP - 1430
JO - Journal of the American College of Cardiology
JF - Journal of the American College of Cardiology
IS - 8
ER -