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Volumn 47, Issue 7, 2006, Pages 1313-1327

Measurement of strain and strain rate by echocardiography: Ready for prime time?

Author keywords

[No Author keywords available]

Indexed keywords

DOBUTAMINE;

EID: 33645394575     PISSN: 07351097     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.jacc.2005.11.063     Document Type: Review
Times cited : (519)

References (47)
  • 1
    • 0034867529 scopus 로고    scopus 로고
    • Can natural strain and strain rate quantify regional myocardial deformation? a study in healthy subjects
    • M. Kowalski, T. Kukulski, F. Jamal Can natural strain and strain rate quantify regional myocardial deformation? A study in healthy subjects Ultrasound Med Biol 27 2001 1087 1097
    • (2001) Ultrasound Med Biol , vol.27 , pp. 1087-1097
    • Kowalski, M.1    Kukulski, T.2    Jamal, F.3
  • 2
    • 0036073312 scopus 로고    scopus 로고
    • Myocardial function defined by strain rate and strain during alterations in inotropic states and heart rate
    • F. Weidemann, F. Jamal, G.R. Sutherland Myocardial function defined by strain rate and strain during alterations in inotropic states and heart rate Am J Physiol Heart Circ Physiol 283 2002 H792 H799
    • (2002) Am J Physiol Heart Circ Physiol , vol.283
    • Weidemann, F.1    Jamal, F.2    Sutherland, G.R.3
  • 3
    • 0031756401 scopus 로고    scopus 로고
    • Real-time strain rate imaging of the left ventricle by ultrasound
    • A. Heimdal, A. Stoylen, H. Torp, T. Skjaerpe Real-time strain rate imaging of the left ventricle by ultrasound J Am Soc Echocardiogr 11 1998 1013 1019
    • (1998) J Am Soc Echocardiogr , vol.11 , pp. 1013-1019
    • Heimdal, A.1    Stoylen, A.2    Torp, H.3    Skjaerpe, T.4
  • 6
    • 0034285961 scopus 로고    scopus 로고
    • Regional strain and strain rate measurements by cardiac ultrasound: Principles, implementation and limitations
    • J. D'hooge, A. Heimdal, F. Jamal Regional strain and strain rate measurements by cardiac ultrasound principles, implementation and limitations Eur J Echocardiogr 1 2000 154 170
    • (2000) Eur J Echocardiogr , vol.1 , pp. 154-170
    • D'Hooge, J.1    Heimdal, A.2    Jamal, F.3
  • 7
    • 3042835499 scopus 로고    scopus 로고
    • Strain and strain rate imaging: A new clinical approach to quantifying regional myocardial function
    • G.R. Sutherland, G. Di Salvo, P. Claus, J. D'hooge, B. Bijnens Strain and strain rate imaging a new clinical approach to quantifying regional myocardial function J Am Soc Echocardiogr 17 2004 788 802
    • (2004) J Am Soc Echocardiogr , vol.17 , pp. 788-802
    • Sutherland, G.R.1    Di Salvo, G.2    Claus, P.3    D'Hooge, J.4    Bijnens, B.5
  • 8
    • 0033840682 scopus 로고    scopus 로고
    • Use of peak systolic strain as an index of regional left ventricular function: Comparison with tissue Doppler velocity during dobutamine stress and myocardial ischemia
    • G. Armstrong, A. Pasquet, K. Fukamachi, L. Cardon, B. Olstad, T. Marwick Use of peak systolic strain as an index of regional left ventricular function comparison with tissue Doppler velocity during dobutamine stress and myocardial ischemia J Am Soc Echocardiogr 13 2000 731 737
    • (2000) J Am Soc Echocardiogr , vol.13 , pp. 731-737
    • Armstrong, G.1    Pasquet, A.2    Fukamachi, K.3    Cardon, L.4    Olstad, B.5    Marwick, T.6
  • 9
    • 0037177165 scopus 로고    scopus 로고
    • Strain rate imaging for assessment of regional myocardial function: Results from a clinical model of septal ablation
    • T.P. Abraham, R.A. Nishimura, D.R. Holmes Jr, M. Belohlavek, J.B. Seward Strain rate imaging for assessment of regional myocardial function results from a clinical model of septal ablation Circulation 105 2002 1403 1406
    • (2002) Circulation , vol.105 , pp. 1403-1406
    • Abraham, T.P.1    Nishimura, R.A.2    Holmes Jr., D.R.3    Belohlavek, M.4    Seward, J.B.5
  • 11
    • 0034609533 scopus 로고    scopus 로고
    • Myocardial strain by Doppler echocardiography. Validation of a new method to quantify regional myocardial function
    • S. Urheim, T. Edvardsen, H. Torp, B. Angelsen, O.A. Smiseth Myocardial strain by Doppler echocardiography. Validation of a new method to quantify regional myocardial function Circulation 102 2000 1158 1164
    • (2000) Circulation , vol.102 , pp. 1158-1164
    • Urheim, S.1    Edvardsen, T.2    Torp, H.3    Angelsen, B.4    Smiseth, O.A.5
  • 12
    • 0142139120 scopus 로고    scopus 로고
    • Effect of angular error on tissue Doppler velocities and strain
    • C. Storaa, P. Aberg, B. Lind, L.A. Brodin Effect of angular error on tissue Doppler velocities and strain Echocardiography 20 2003 581 587
    • (2003) Echocardiography , vol.20 , pp. 581-587
    • Storaa, C.1    Aberg, P.2    Lind, B.3    Brodin, L.A.4
  • 13
    • 0036645470 scopus 로고    scopus 로고
    • Quantitative assessment of intrinsic regional myocardial deformation by Doppler strain rate echocardiography in humans: Validation against three-dimensional tagged magnetic resonance imaging
    • T. Edvardsen, B.L. Gerber, J. Garot, D.A. Bluemke, J.A. Lima, O.A. Smiseth Quantitative assessment of intrinsic regional myocardial deformation by Doppler strain rate echocardiography in humans validation against three-dimensional tagged magnetic resonance imaging Circulation 106 2002 50 56
    • (2002) Circulation , vol.106 , pp. 50-56
    • Edvardsen, T.1    Gerber, B.L.2    Garot, J.3    Bluemke, D.A.4    Lima, J.A.5    Smiseth, O.A.6
  • 14
    • 4644316961 scopus 로고    scopus 로고
    • Two-dimensional strain - a novel software for real-time quantitative echocardiographic assessment of myocardial function
    • M. Leitman, P. Lysyansky, S. Sidenko Two-dimensional strain - a novel software for real-time quantitative echocardiographic assessment of myocardial function J Am Soc Echocardiogr 17 2004 1021 1029
    • (2004) J Am Soc Echocardiogr , vol.17 , pp. 1021-1029
    • Leitman, M.1    Lysyansky, P.2    Sidenko, S.3
  • 16
    • 20444454687 scopus 로고    scopus 로고
    • Measurement of ventricular torsion by two-dimensional ultrasound speckle tracking imaging
    • Y. Notomi, P. Lysyansky, R.M. Setser Measurement of ventricular torsion by two-dimensional ultrasound speckle tracking imaging J Am Coll Cardiol 45 2005 2034 2041
    • (2005) J Am Coll Cardiol , vol.45 , pp. 2034-2041
    • Notomi, Y.1    Lysyansky, P.2    Setser, R.M.3
  • 17
    • 0038219591 scopus 로고    scopus 로고
    • Incidence and characteristics of segmental postsystolic longitudinal shortening in normal, acutely ischemic, and scarred myocardium
    • J.U. Voigt, G. Lindenmeier, B. Exner Incidence and characteristics of segmental postsystolic longitudinal shortening in normal, acutely ischemic, and scarred myocardium J Am Soc Echocardiogr 16 2003 415 423
    • (2003) J Am Soc Echocardiogr , vol.16 , pp. 415-423
    • Voigt, J.U.1    Lindenmeier, G.2    Exner, B.3
  • 18
    • 0037420125 scopus 로고    scopus 로고
    • Identification of acutely ischemic myocardium using ultrasonic strain measurements. a clinical study in patients undergoing coronary angioplasty
    • T. Kukulski, F. Jamal, L. Herbots Identification of acutely ischemic myocardium using ultrasonic strain measurements. A clinical study in patients undergoing coronary angioplasty J Am Coll Cardiol 41 2003 810 819
    • (2003) J Am Coll Cardiol , vol.41 , pp. 810-819
    • Kukulski, T.1    Jamal, F.2    Herbots, L.3
  • 19
    • 0037031311 scopus 로고    scopus 로고
    • Postsystolic shortening in ischemic myocardium: Active contraction or passive recoil?
    • H. Skulstad, T. Edvardsen, S. Urheim Postsystolic shortening in ischemic myocardium active contraction or passive recoil? Circulation 106 2002 718 724
    • (2002) Circulation , vol.106 , pp. 718-724
    • Skulstad, H.1    Edvardsen, T.2    Urheim, S.3
  • 20
    • 0036568918 scopus 로고    scopus 로고
    • Time to onset of regional relaxation: Feasibility, variability and utility of a novel index of regional myocardial function by strain rate imaging
    • T.P. Abraham, M. Belohlavek, H.L. Thomson Time to onset of regional relaxation feasibility, variability and utility of a novel index of regional myocardial function by strain rate imaging J Am Coll Cardiol 39 2002 1531 1537
    • (2002) J Am Coll Cardiol , vol.39 , pp. 1531-1537
    • Abraham, T.P.1    Belohlavek, M.2    Thomson, H.L.3
  • 21
    • 3042857524 scopus 로고    scopus 로고
    • Tissue Doppler imaging is superior to strain rate imaging and postsystolic shortening on the prediction of reverse remodeling in both ischemic and nonischemic heart failure after cardiac resynchronization therapy
    • C.M. Yu, J.W. Fung, Q. Zhang Tissue Doppler imaging is superior to strain rate imaging and postsystolic shortening on the prediction of reverse remodeling in both ischemic and nonischemic heart failure after cardiac resynchronization therapy Circulation 110 2004 66 73
    • (2004) Circulation , vol.110 , pp. 66-73
    • Yu, C.M.1    Fung, J.W.2    Zhang, Q.3
  • 22
    • 0842321772 scopus 로고    scopus 로고
    • Noninvasive quantification of regional myocardial function using Doppler-derived velocity, displacement, strain rate, and strain in healthy volunteers: Effects of aging
    • J.P. Sun, Z.B. Popovic, N.L. Greenberg Noninvasive quantification of regional myocardial function using Doppler-derived velocity, displacement, strain rate, and strain in healthy volunteers effects of aging J Am Soc Echocardiogr 17 2004 132 138
    • (2004) J Am Soc Echocardiogr , vol.17 , pp. 132-138
    • Sun, J.P.1    Popovic, Z.B.2    Greenberg, N.L.3
  • 23
    • 0036142156 scopus 로고    scopus 로고
    • Doppler-derived myocardial systolic strain rate is a strong index of left ventricular contractility
    • N.L. Greenberg, M.S. Firstenberg, P.L. Castro Doppler-derived myocardial systolic strain rate is a strong index of left ventricular contractility Circulation 105 2002 99 105
    • (2002) Circulation , vol.105 , pp. 99-105
    • Greenberg, N.L.1    Firstenberg, M.S.2    Castro, P.L.3
  • 24
    • 0037842018 scopus 로고    scopus 로고
    • Longitudinal myocardial function assessed by tissue velocity, strain, and strain rate tissue Doppler echocardiography in patients with AL (primary) cardiac amyloidosis
    • J. Koyama, P.A. Ray-Sequin, R.H. Falk Longitudinal myocardial function assessed by tissue velocity, strain, and strain rate tissue Doppler echocardiography in patients with AL (primary) cardiac amyloidosis Circulation 107 2003 2446 2452
    • (2003) Circulation , vol.107 , pp. 2446-2452
    • Koyama, J.1    Ray-Sequin, P.A.2    Falk, R.H.3
  • 25
    • 0037374534 scopus 로고    scopus 로고
    • Quantification of regional right and left ventricular function by ultrasonic strain rate and strain indexes in Friedreich's ataxia
    • F. Weidemann, B. Eyskens, L. Mertens Quantification of regional right and left ventricular function by ultrasonic strain rate and strain indexes in Friedreich's ataxia Am J Cardiol 91 2003 622 626
    • (2003) Am J Cardiol , vol.91 , pp. 622-626
    • Weidemann, F.1    Eyskens, B.2    Mertens, L.3
  • 26
    • 0036713017 scopus 로고    scopus 로고
    • Myocardial abnormalities in hypertensive patients with normal and abnormal left ventricular filling: A study of ultrasound tissue characterization and strain
    • S. Yuda, L. Short, R. Leano, T.H. Marwick Myocardial abnormalities in hypertensive patients with normal and abnormal left ventricular filling a study of ultrasound tissue characterization and strain Clin Sci (Lond) 103 2002 283 293
    • (2002) Clin Sci (Lond) , vol.103 , pp. 283-293
    • Yuda, S.1    Short, L.2    Leano, R.3    Marwick, T.H.4
  • 27
    • 11144278247 scopus 로고    scopus 로고
    • Discrimination of nonobstructive hypertrophic cardiomyopathy from hypertensive left ventricular hypertrophy on the basis of strain rate imaging by tissue Doppler ultrasonography
    • T.S. Kato, A. Noda, H. Izawa Discrimination of nonobstructive hypertrophic cardiomyopathy from hypertensive left ventricular hypertrophy on the basis of strain rate imaging by tissue Doppler ultrasonography Circulation 110 2004 3808 3814
    • (2004) Circulation , vol.110 , pp. 3808-3814
    • Kato, T.S.1    Noda, A.2    Izawa, H.3
  • 28
    • 0037099275 scopus 로고    scopus 로고
    • Quantification of regional right and left ventricular function by ultrasonic strain rate and strain indexes after surgical repair of tetralogy of Fallot
    • F. Weidemann, B. Eyskens, L. Mertens Quantification of regional right and left ventricular function by ultrasonic strain rate and strain indexes after surgical repair of tetralogy of Fallot Am J Cardiol 90 2002 133 138
    • (2002) Am J Cardiol , vol.90 , pp. 133-138
    • Weidemann, F.1    Eyskens, B.2    Mertens, L.3
  • 29
    • 4644299160 scopus 로고    scopus 로고
    • Pulmonary regurgitation is an important determinant of right ventricular contractile dysfunction in patients with surgically repaired tetralogy of Fallot
    • A. Frigiola, A.N. Redington, S. Cullen, M. Vogel Pulmonary regurgitation is an important determinant of right ventricular contractile dysfunction in patients with surgically repaired tetralogy of Fallot Circulation 110 2004 II153 II157
    • (2004) Circulation , vol.110
    • Frigiola, A.1    Redington, A.N.2    Cullen, S.3    Vogel, M.4
  • 30
    • 20644443524 scopus 로고    scopus 로고
    • Regional right and left ventricular function after the Senning operation: An ultrasonic study of strain rate and strain
    • B. Eyskens, F. Weidemann, M. Kowalski Regional right and left ventricular function after the Senning operation an ultrasonic study of strain rate and strain Cardiol Young 14 2004 255 264
    • (2004) Cardiol Young , vol.14 , pp. 255-264
    • Eyskens, B.1    Weidemann, F.2    Kowalski, M.3
  • 31
    • 7944236374 scopus 로고    scopus 로고
    • Prediction of subclinical left ventricular dysfunction with strain rate imaging in patients with asymptomatic severe mitral regurgitation
    • R. Lee, L. Hanekom, T.H. Marwick, R. Leano, S. Wahi Prediction of subclinical left ventricular dysfunction with strain rate imaging in patients with asymptomatic severe mitral regurgitation Am J Cardiol 94 2004 1333 1337
    • (2004) Am J Cardiol , vol.94 , pp. 1333-1337
    • Lee, R.1    Hanekom, L.2    Marwick, T.H.3    Leano, R.4    Wahi, S.5
  • 32
    • 0038342752 scopus 로고    scopus 로고
    • Decreased left ventricular longitudinal contraction in normotensive and normoalbuminuric patients with type II diabetes mellitus: A Doppler tissue tracking and strain rate echocardiography study
    • N.H. Andersen, S.H. Poulsen, H. Eiskjaer, P.L. Poulsen, C.E. Mogensen Decreased left ventricular longitudinal contraction in normotensive and normoalbuminuric patients with type II diabetes mellitus a Doppler tissue tracking and strain rate echocardiography study Clin Sci (Lond) 105 2003 59 66
    • (2003) Clin Sci (Lond) , vol.105 , pp. 59-66
    • Andersen, N.H.1    Poulsen, S.H.2    Eiskjaer, H.3    Poulsen, P.L.4    Mogensen, C.E.5
  • 33
    • 3543099842 scopus 로고    scopus 로고
    • Effect of aldosterone antagonism on myocardial dysfunction in hypertensive patients with diastolic heart failure
    • P.M. Mottram, B. Haluska, R. Leano, D. Cowley, M. Stowasser, T.H. Marwick Effect of aldosterone antagonism on myocardial dysfunction in hypertensive patients with diastolic heart failure Circulation 110 2004 558 565
    • (2004) Circulation , vol.110 , pp. 558-565
    • Mottram, P.M.1    Haluska, B.2    Leano, R.3    Cowley, D.4    Stowasser, M.5    Marwick, T.H.6
  • 34
    • 0033960196 scopus 로고    scopus 로고
    • New techniques for the quantification of myocardial function: Acoustic quantification, color kinesis, tissue Doppler and "strain rate imaging"
    • J.U. Voigt, H. vonBibra, W.G. Daniel New techniques for the quantification of myocardial function acoustic quantification, color kinesis, tissue Doppler and "strain rate imaging" Z Kardiol 89 Suppl 1 2000 97 103
    • (2000) Z Kardiol , vol.89 , Issue.1 SUPPL. , pp. 97-103
    • Voigt, J.U.1    Vonbibra, H.2    Daniel, W.G.3
  • 35
    • 0141765881 scopus 로고    scopus 로고
    • Improvement of cardiac function during enzyme replacement therapy in patients with Fabry disease: A prospective strain rate imaging study
    • F. Weidemann, F. Breunig, M. Beer Improvement of cardiac function during enzyme replacement therapy in patients with Fabry disease a prospective strain rate imaging study Circulation 108 2003 1299 1301
    • (2003) Circulation , vol.108 , pp. 1299-1301
    • Weidemann, F.1    Breunig, F.2    Beer, M.3
  • 37
    • 4544254485 scopus 로고    scopus 로고
    • Acute improvement in global and regional left ventricular systolic function after percutaneous heart valve implantation in patients with symptomatic aortic stenosis
    • F. Bauer, H. Eltchaninoff, C. Tron Acute improvement in global and regional left ventricular systolic function after percutaneous heart valve implantation in patients with symptomatic aortic stenosis Circulation 110 2004 1473 1476
    • (2004) Circulation , vol.110 , pp. 1473-1476
    • Bauer, F.1    Eltchaninoff, H.2    Tron, C.3
  • 38
    • 0036370966 scopus 로고    scopus 로고
    • Strain rate imaging for the assessment of preload-dependent changes in regional left ventricular diastolic longitudinal function
    • J.U. Voigt, G. Lindenmeier, D. Werner Strain rate imaging for the assessment of preload-dependent changes in regional left ventricular diastolic longitudinal function J Am Soc Echocardiogr 15 2002 13 19
    • (2002) J Am Soc Echocardiogr , vol.15 , pp. 13-19
    • Voigt, J.U.1    Lindenmeier, G.2    Werner, D.3
  • 39
    • 3042594159 scopus 로고    scopus 로고
    • Flow propagation velocity is not a simple index of diastolic function in early filling. a comparative study of early diastolic strain rate and strain rate propagation, flow and flow propagation in normal and reduced diastolic function
    • A. Stoylen, G. Skjelvan, T. Skjaerpe Flow propagation velocity is not a simple index of diastolic function in early filling. A comparative study of early diastolic strain rate and strain rate propagation, flow and flow propagation in normal and reduced diastolic function Cardiovasc Ultrasound 1 2003 3
    • (2003) Cardiovasc Ultrasound , vol.1 , pp. 3
    • Stoylen, A.1    Skjelvan, G.2    Skjaerpe, T.3
  • 40
    • 0038523963 scopus 로고    scopus 로고
    • Strain-rate imaging during dobutamine stress echocardiography provides objective evidence of inducible ischemia
    • J.U. Voigt, B. Exner, K. Schmiedehausen Strain-rate imaging during dobutamine stress echocardiography provides objective evidence of inducible ischemia Circulation 107 2003 2120 2126
    • (2003) Circulation , vol.107 , pp. 2120-2126
    • Voigt, J.U.1    Exner, B.2    Schmiedehausen, K.3
  • 41
    • 0037448793 scopus 로고    scopus 로고
    • Defining the transmurality of a chronic myocardial infarction by ultrasonic strain-rate imaging: Implications for identifying intramural viability: An experimental study
    • F. Weidemann, C. Dommke, B. Bijnens Defining the transmurality of a chronic myocardial infarction by ultrasonic strain-rate imaging: implications for identifying intramural viability: an experimental study Circulation 107 2003 883 888
    • (2003) Circulation , vol.107 , pp. 883-888
    • Weidemann, F.1    Dommke, C.2    Bijnens, B.3
  • 42
    • 0242628915 scopus 로고    scopus 로고
    • Myocardial strain rate is a superior method for evaluation of left ventricular subendocardial function compared with tissue Doppler imaging
    • I. Hashimoto, X. Li, B.A. Hejmadi, M. Jones, A.D. Zetts, D.J. Sahn Myocardial strain rate is a superior method for evaluation of left ventricular subendocardial function compared with tissue Doppler imaging J Am Coll Cardiol 42 2003 1574 1583
    • (2003) J Am Coll Cardiol , vol.42 , pp. 1574-1583
    • Hashimoto, I.1    Li, X.2    Hejmadi, B.A.3    Jones, M.4    Zetts, A.D.5    Sahn, D.J.6
  • 43
    • 0037028694 scopus 로고    scopus 로고
    • Strain rate measurement by Doppler echocardiography allows improved assessment of myocardial viability inpatients with depressed left ventricular function
    • R. Hoffmann, E. Altiok, B. Nowak Strain rate measurement by Doppler echocardiography allows improved assessment of myocardial viability inpatients with depressed left ventricular function J Am Coll Cardiol 39 2002 443 449
    • (2002) J Am Coll Cardiol , vol.39 , pp. 443-449
    • Hoffmann, R.1    Altiok, E.2    Nowak, B.3
  • 44
    • 16344374396 scopus 로고    scopus 로고
    • Strain rate analysis allows detection of differences in diastolic function between viable and nonviable myocardial segments
    • R. Hoffmann, E. Altiok, B. Nowak Strain rate analysis allows detection of differences in diastolic function between viable and nonviable myocardial segments J Am Soc Echocardiogr 18 2005 330 335
    • (2005) J Am Soc Echocardiogr , vol.18 , pp. 330-335
    • Hoffmann, R.1    Altiok, E.2    Nowak, B.3
  • 45
    • 33644876814 scopus 로고    scopus 로고
    • Accuracy of strain rate techniques for identification of viability at dobutamine stress echo: A follow-up study after revascularization
    • L. Hanekom, C. Jenkins, L. Short, T.H. Marwick Accuracy of strain rate techniques for identification of viability at dobutamine stress echo a follow-up study after revascularization Circulation 112 2005 3892 3900
    • (2005) Circulation , vol.112 , pp. 3892-3900
    • Hanekom, L.1    Jenkins, C.2    Short, L.3    Marwick, T.H.4
  • 46
    • 0035880655 scopus 로고    scopus 로고
    • Effect of tissue Doppler on the accuracy of novice and expert interpreters of dobutamine echocardiography
    • R. Fathi, P. Cain, S. Nakatani, H.C. Yu, T.H. Marwick Effect of tissue Doppler on the accuracy of novice and expert interpreters of dobutamine echocardiography Am J Cardiol 88 2001 400 405
    • (2001) Am J Cardiol , vol.88 , pp. 400-405
    • Fathi, R.1    Cain, P.2    Nakatani, S.3    Yu, H.C.4    Marwick, T.H.5
  • 47
    • 0037384457 scopus 로고    scopus 로고
    • Can regional strain and strain rate measurement be performed during both dobutamine and exercise echocardiography, and do regional deformation responses differ with different forms of stress testing?
    • G. Davidavicius, M. Kowalski, R.I. Williams Can regional strain and strain rate measurement be performed during both dobutamine and exercise echocardiography, and do regional deformation responses differ with different forms of stress testing? J Am Soc Echocardiogr 16 2003 299 308
    • (2003) J Am Soc Echocardiogr , vol.16 , pp. 299-308
    • Davidavicius, G.1    Kowalski, M.2    Williams, R.I.3


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