TY - JOUR
T1 - Prognosis of Light Chain Amyloidosis With Preserved LVEF
T2 - Added Value of 2D Speckle-Tracking Echocardiography to the Current Prognostic Staging System
AU - Barros-Gomes, Sergio
AU - Williams, Brittney
AU - Nhola, Lara F.
AU - Grogan, Martha
AU - Maalouf, Joseph F.
AU - Dispenzieri, Angela
AU - Pellikka, Patricia A.
AU - Villarraga, Hector R.
N1 - Publisher Copyright:
© 2017 American College of Cardiology Foundation
PY - 2017/4/1
Y1 - 2017/4/1
N2 - Objectives This study evaluated whether 2-dimensional speckle-tracking echocardiography (2D-STE) has incremental value for prognosis over traditional clinical, echocardiographic, and serological markers—with main focus on the current prognostic staging system—in light-chain (AL) amyloidosis patients with preserved left ventricular ejection fraction. Background Cardiac amyloidosis (CA) is the major determinant of outcome in AL amyloidosis. The current prognostic staging system is based primarily on serum levels of cardiac troponin T (cTnT), N-terminal pro–B-type natriuretic peptide (NT-proBNP), and free light chain differential (FLC-diff). Methods Consecutive patients with biopsy-proven AL amyloidosis and left ventricular ejection fraction ≥55% were divided into group 1 with CA (n = 63) and group 2 without CA (n = 87). Global longitudinal strain (GLS) by 2D-STE was performed with Vivid E9 (GE Healthcare Co., Milwaukee, Wisconsin) and syngo Velocity Vector Imaging (VVI) software (Siemens Medical Solutions USA, Inc., Malvern, Pennsylvania) (GLSGE and GLSVVI, respectively). Results Thirty-two deaths (51%) occurred in group 1 and 13 (15%) in group 2 (p ≤ 0.001). Group 1 had thicker walls, lower early diastolic tissue Doppler velocity at septal mitral annulus, and greater left ventricular mass, left atrial volume, glomerular filtration rate, FLC-diff, cTnT, and NT-proBNP (p < 0.001). For the entire cohort, GLSGE ≥ −14.81, GLSVVI ≥−15.02, cTnT, NT-proBNP, FLC-diff, age, left ventricular wall thickness, early diastolic tissue Doppler velocity at septal mitral annulus, diastolic dysfunction grade, glomerular filtration rate, deceleration time, and left atrial volume were univariate predictors of death. In a multivariate Cox model, GLSGE ≥−14.81 (hazard ratio [HR]: 2.68; 95% confidence interval [CI]: 1.07 to 7.13; p = 0.03), FLC-diff, NT-proBNP, and age were independent predictors of survival. There was also a strong trend for GLSVVI ≥−15.02 (HR: 2.44; 95% CI: 0.98 to 6.33; p = 0.055). Using a nested logistic regression model, GLSGE (p = 0.03) and GLSVVI (p = 0.05) provided incremental prognostic value over cTnT, NT-proBNP, and FLC-diff. For survival analysis limited to group 2 (non-CA), GLSGE and GLSVVI both predicted all-cause mortality (GLSGE HR: 1.23; 95% CI: 1.03 to 1.47 [p = 0.02]; GLSVVI HR: 1.22; 95% CI: 1.01 to 1.49 [p = 0.04], respectively). Conclusions 2D-STE predicted outcome and provided incremental prognostic information over the current prognostic staging system, especially in the group without CA.
AB - Objectives This study evaluated whether 2-dimensional speckle-tracking echocardiography (2D-STE) has incremental value for prognosis over traditional clinical, echocardiographic, and serological markers—with main focus on the current prognostic staging system—in light-chain (AL) amyloidosis patients with preserved left ventricular ejection fraction. Background Cardiac amyloidosis (CA) is the major determinant of outcome in AL amyloidosis. The current prognostic staging system is based primarily on serum levels of cardiac troponin T (cTnT), N-terminal pro–B-type natriuretic peptide (NT-proBNP), and free light chain differential (FLC-diff). Methods Consecutive patients with biopsy-proven AL amyloidosis and left ventricular ejection fraction ≥55% were divided into group 1 with CA (n = 63) and group 2 without CA (n = 87). Global longitudinal strain (GLS) by 2D-STE was performed with Vivid E9 (GE Healthcare Co., Milwaukee, Wisconsin) and syngo Velocity Vector Imaging (VVI) software (Siemens Medical Solutions USA, Inc., Malvern, Pennsylvania) (GLSGE and GLSVVI, respectively). Results Thirty-two deaths (51%) occurred in group 1 and 13 (15%) in group 2 (p ≤ 0.001). Group 1 had thicker walls, lower early diastolic tissue Doppler velocity at septal mitral annulus, and greater left ventricular mass, left atrial volume, glomerular filtration rate, FLC-diff, cTnT, and NT-proBNP (p < 0.001). For the entire cohort, GLSGE ≥ −14.81, GLSVVI ≥−15.02, cTnT, NT-proBNP, FLC-diff, age, left ventricular wall thickness, early diastolic tissue Doppler velocity at septal mitral annulus, diastolic dysfunction grade, glomerular filtration rate, deceleration time, and left atrial volume were univariate predictors of death. In a multivariate Cox model, GLSGE ≥−14.81 (hazard ratio [HR]: 2.68; 95% confidence interval [CI]: 1.07 to 7.13; p = 0.03), FLC-diff, NT-proBNP, and age were independent predictors of survival. There was also a strong trend for GLSVVI ≥−15.02 (HR: 2.44; 95% CI: 0.98 to 6.33; p = 0.055). Using a nested logistic regression model, GLSGE (p = 0.03) and GLSVVI (p = 0.05) provided incremental prognostic value over cTnT, NT-proBNP, and FLC-diff. For survival analysis limited to group 2 (non-CA), GLSGE and GLSVVI both predicted all-cause mortality (GLSGE HR: 1.23; 95% CI: 1.03 to 1.47 [p = 0.02]; GLSVVI HR: 1.22; 95% CI: 1.01 to 1.49 [p = 0.04], respectively). Conclusions 2D-STE predicted outcome and provided incremental prognostic information over the current prognostic staging system, especially in the group without CA.
KW - amyloid
KW - cardiac amyloidosis
KW - cardiomyopathy
KW - echocardiography
KW - mortality
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U2 - 10.1016/j.jcmg.2016.04.008
DO - 10.1016/j.jcmg.2016.04.008
M3 - Article
C2 - 27639764
AN - SCOPUS:84994777494
SN - 1936-878X
VL - 10
SP - 398
EP - 407
JO - JACC: Cardiovascular Imaging
JF - JACC: Cardiovascular Imaging
IS - 4
ER -