Recent advances in cardiac resynchronization therapy: Echocardiographic modalities, patient selection, optimization, non-responders-all you need to know for more efficient CRT

International Journal of Cardiovascular Imaging

Volumn 26, Issue 2, 2010, Pages 177-191

  Pavlopoulos, Harry ^a   Nihoyannopoulos, Petros ^a  

^a HAMMERSMITH HOSPITAL   (United Kingdom)

Author keywords

Dyssynchrony; Heart failure

Indexed keywords

ARTIFICIAL HEART PACEMAKER; BLOOD FLOW VELOCITY; CARDIAC RESYNCHRONIZATION THERAPY; COLOR ULTRASOUND FLOWMETRY; CONGESTIVE CARDIOMYOPATHY; CORONARY VEIN; DISEASE SEVERITY; ECHOCARDIOGRAPHY; EXCITATION CONTRACTION COUPLING; HEART ATRIUM FIBRILLATION; HEART FAILURE; HEART LEFT VENTRICLE FILLING; HEART MUSCLE CONTRACTILITY; HEART RIGHT BUNDLE BRANCH BLOCK; HUMAN; IMAGE ANALYSIS; IMAGE DISPLAY; IMPLANTATION; M MODE ECHOCARDIOGRAPHY; PATIENT SELECTION; PROCESS OPTIMIZATION; QRS COMPLEX; REVIEW; SCAR FORMATION; STRESS ECHOCARDIOGRAPHY; THREE DIMENSIONAL ECHOCARDIOGRAPHY; TISSUE DOPPLER IMAGING; VENOUS CIRCULATION;

CARDIAC PACING, ARTIFICIAL; ECHOCARDIOGRAPHY, DOPPLER; EQUIPMENT DESIGN; EVIDENCE-BASED MEDICINE; HEART CONDUCTION SYSTEM; HEART FAILURE; HUMANS; PACEMAKER, ARTIFICIAL; PATIENT SELECTION; PRACTICE GUIDELINES AS TOPIC; PREDICTIVE VALUE OF TESTS; SEVERITY OF ILLNESS INDEX; TIME FACTORS; TREATMENT OUTCOME; VENTRICULAR DYSFUNCTION, LEFT; VENTRICULAR FUNCTION, LEFT;

EID: 77950939993     PISSN: 15695794     EISSN: None     Source Type: Journal    
DOI: 10.1007/s10554-009-9523-5     Document Type: Review

References (85)

1. KKL Ho JL Pinsky WB Kannel D Levy 1993 The epidemiology of heart failure: the Framingham study J Am Coll Cardiol 22 Suppl A 6A 13A 8376698
2. MR Bristow LA Saxon J Boehmer S Krueger DA Kass T De Marco, et al. 2004 Cardiac-resynchronization therapy with or without an implantable defibrillator in advanced chronic heart failure N Engl J Med 350 2140 2150 10.1056/NEJMoa032423 15152059 (Pubitemid 38637994)
3. J Cleland JC Daubert E Erdmann N Freemantle D Gras L Kappenberger, et al. 2005 The effect of cardiac resynchronization on morbidity and mortality in heart failure N Engl J Med 352 1539 1549 10.1056/NEJMoa050496 15753115 (Pubitemid 40517094)
4. The Task Force for the Diagnosis and Treatment of Acute and Chronic Heart Failure 2008 of the European Society of Cardiology. (2008). ESC guidelines for the diagnosis and treatment of acute and chronic heart failure 2008. Eur Heart J 29: 2388-2442
5. JJ Bax TH Marwick SG Molhoek GB Bleeker L Van Erven E Boersma, et al. 2003 Left ventricular Dyssynchrony predicts benefit of cardiac resynchronization therapy in patients with end-stage heart failure before pacemaker implantation Am J Cardiol 92 1238 1240 10.1016/j.amjcard.2003.06.016 14609610 (Pubitemid 37377846)
6. CM Yu WH Fung H Lin Q Zhang JE Sanderson CP Lau 2003 Predictors of left ventricular reverse remodeling after cardiac resynchronization therapy for heart failure secondary to idiopathic dilated or ischemic cardiomyopathy Am J Cardiol 91 684 688 10.1016/S0002-9149(02)03404-5 12633798 (Pubitemid 36287458)
7. C Grines T Bashore H Boudoulas S Olson P Shafer C Wooley 1989 Functional abnormalities in isolated left bundle branch block. The effect of interventricular asynchrony Circulation 79 845 853 2924415
8. L Padelettia M Giaccardia F Turrenia N Musillia A Colellaa P Pieragnolia, et al. 2004 Influence of QRS prolongation on the natural history of CHF Eur Heart J Suppl 6 D79 D82 10.1016/j.ehjsup.2004.05.023 (Pubitemid 38993435)
9. CM Yu H Lin Q Zhang, et al. 2003 High prevalence of left ventricular systolic and diastolic asynchrony in patients with congestive heart failure and normal QRS duration Heart 89 54 60 10.1136/heart.89.1.54 12482792 (Pubitemid 36044290)
10. S Asirvatham 2007 Cardiac resynchronization: is electrical synchrony relevant? J Cardiovasc Electrophysiol 18 1028 1031 10.1111/j.1540-8167.2007. 00932.x 17711433 (Pubitemid 47416577)
11. JJ Bax GB Bleeker TH Marwick, et al. 2004 Left ventricular dyssynchrony predicts response and prognosis after cardiac resynchronization therapy J Am Coll Cardiol 44 1834 1840 10.1016/j.jacc.2004.08.016 15519016 (Pubitemid 39424084)
12. J Bax T Abraham S Barold O Breithardt J Fung S Garrigue, et al. 2005 Cardiac resynchronization therapy J Am Coll Cardiol 46 2153 2167 10.1016/j.jacc.2005.09.019 16360042 (Pubitemid 41785481)
13. C Parsai B Bijnens GR Sutherland A Baltabaeva P Claus M Marciniak, et al. 2009 Toward understanding response to cardiac resynchronization therapy: left ventricular dyssynchrony is only one of multiple mechanisms Eur Heart J 8 940 849
14. S Cazeau P Bordachar G Jauvert A Lazarus C Alonso M Vandrell, et al. 2003 Echocardiographic modeling of cardiac dyssynchrony before and during multisite stimulation: a prospective study Pacing Clin Electrophysiol 26 137 143 10.1046/j.1460-9592.2003.00003.x 12687799 (Pubitemid 36399126)
15. F Rouleau M Merheb S Geffroy J Berthelot D Chaleil J Dupuis, et al. 2001 Echocardiographic assessment of the interventricular delay of activation and correlation to the QRS width in dilated cardiomyopathy Pacing Clin Electrophysiol 24 1500 1506 10.1046/j.1460-9592.2001.01500.x 11707043
16. S Ghio C Constantina C Klersy A Serioa A Fontana C Campana, et al. 2004 Interventricular and intraventricular dyssynchrony are common in heart failure patients, regardless of QRS duration Eur Heart J 7 571 578 10.1016/j.ehj.2003. 09.030 (Pubitemid 38478550)
17. M Penicka J Bartunek B de Bruyne M Marc Vanderheyden M Goethals M Marc De Zutter, et al. 2004 Improvement of left ventricular function after cardiac resynchronization therapy is predicted by tissue Doppler imaging echocardiography Circulation 109 978 983 10.1161/01.CIR.0000116765.43251.D7 14769701 (Pubitemid 38282850)
18. M Pitzalis M Iacoviello R Romito F Massari B Rizzon G Luzzi, et al. 2002 Cardiac resynchronization therapy tailored by echocardiographic evaluation of ventricular asynchrony J Am Coll Cardiol 40 1615 1622 10.1016/S0735-1097(02) 02337-9 12427414 (Pubitemid 35253639)
19. G Marcus E Rose E Viloria J Schafer T De Marco L Saxon, et al. 2005 Septal to posterior wall motion delay fails to predict reverse remodeling or clinical improvement in patients undergoing cardiac resynchronization therapy J Am Coll Cardiol 46 2208 2214 10.1016/j.jacc.2005.05.095 16360048 (Pubitemid 41785487)
20. GB Bleeker MJ Schalij E Boersma ER Holman P Steendijk EE Van der Wall, et al. 2007 Relative merits of M-mode echocardiography and tissue Doppler imaging for prediction of response to cardiac resynchronization therapy in patients with heart failure secondary to ischemic or idiopathic dilated cardiomyopathy Am J Cardiol 1 68 74 10.1016/j.amjcard.2006.07.068 (Pubitemid 44969346)
21. CM Yu JW Fung Q Zhang C Chan Y Chan H Hong Lin, et al. 2004 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 66 73 10.1161/01.CIR.0000133276.45198.A5 15197148 (Pubitemid 38880135)
22. D Notabartolo JD Merlino AL Smith D DeLurgio F Vera K Easley, et al. 2004 Usefulness of the peak velocity difference by tissue Doppler imaging technique as an effective predictor of response to cardiac resynchronization therapy Am J Cardiol 94 817 820 10.1016/j.amjcard.2004.05.072 15374800 (Pubitemid 39221513)
23. CM Yu Q Zhang YS Chan CK Chan GW Yip LC Kum, et al. 2006 Tissue Doppler velocity is superior to displacement and strain mapping in predicting left ventricular reverse remodelling response after cardiac resynchronisation therapy Heart 92 1452 1456 10.1136/hrt.2005.083592 16621873 (Pubitemid 44578840)
24. NR Van de Veire GB Bleeker J De Sutter C Ypenburg ER Holman EE Van DerWal, et al. 2007 Tissue synchronisation imaging accurately measures left ventricular dyssynchrony and predicts response to cardiac resynchronisation therapy Heart 93 1034 1039 10.1136/hrt.2006.099424 17309912 (Pubitemid 47310976)
25. CM Yu Q Zhang J Fung H Chi-Kin Chan Y Chan G Yip, et al. 2005 A novel tool to assess systolic asynchrony and identify responders of cardiac resynchronization therapy by tissue synchronization imaging J Am Coll Cardiol 45 677 684 10.1016/j.jacc.2004.12.003 15734610 (Pubitemid 40278965)
26. S Kapetenakis A Siva N Corrigan M Cooklin MT Kearney MJ Monaghan 2005 Real-time three-dimensional echocardiography: a novel technique to quantify global left ventricular mechanical dyssynchrony Circulation 112 992 1000 10.1161/CIRCULATIONAHA.104.474445 (Pubitemid 41170267)
27. NA Marsan GB Bleeker C Ypenburg S Ghio NR Van de Veire ER Holman, et al. 2008 Real-time three-dimensional echocardiography permits quantification of left ventricular mechanical dyssynchrony and predicts acute response to cardiac resynchronization therapy J Cardiovasc Electrophysiol 4 392 399 10.1111/j.1540-8167.2007.01056.x (Pubitemid 351457556)
28. M Suffoletto K Dohi M Cannesson S Saba J Gorcsan 2006 Novel speckle-tracking radial strain from routineblack-and-white echocardiographic images to quantify dyssynchrony and predict response to cardiac resynchronization therapy Circulation 113 960 968 10.1161/CIRCULATIONAHA.105. 571455 16476850 (Pubitemid 43879471)
29. M Cannesson T Tanabe M Suffoletto D Schwartzman J Gorcsan 2006 Velocity vector imaging to quantify ventricular dyssynchrony and predict response to cardiac resynchronization therapy Am J Cardiol 98 949 953 10.1016/j.amjcard. 2006.04.045 16996881 (Pubitemid 44402275)
30. D Mele G Pasanisi F Capasso A Simone M Morales D Poggio, et al. 2006 Left intraventricular myocardial deformation dyssynchrony identifies responders to cardiac resynchronization therapy in patients with heart failure Eur Heart J 27 1070 1078 10.1093/eurheartj/ehi814 16574689
31. C Miyazaki G Lin B Powell R Espinosa C Bruce F Miller, et al. 2008 Strain dyssynchrony index correlates with improvement in left ventricular volume after cardiac resynchronization therapy better than tissue velocity dyssynchrony indexes Circ Cardiovasc Imaging 1 14 22 10.1161/CIRCIMAGING.108.774513 19808510
32. CM Yu J Gorcsan III GB Bleeker Q Zhang MJ Schalij MS Suffoletto, et al. 2007 Usefulness of tissue Doppler velocity and strain dyssynchrony for predicting left ventricular reverse remodeling response after cardiac resynchronization therapy Am J Cardiol 8 1263 1270 10.1016/j.amjcard.2007.05.060 (Pubitemid 47498285)
33. J Gorcsan M Tanabe G Bleeker M Suffoletto N Thomas S Saba, et al. 2007 Combined longitudinal and radial dyssynchrony predicts ventricular response after resynchronization therapy J Am Coll Cardiol 50 1476 1483 10.1016/j.jacc.2007.06.043 17919568 (Pubitemid 47494594)
34. NR Van de Veire GB Bleeker C Ypenburg J De Sutter N Ajmone Marsan ER Holman, et al. 2007 Usefulness of triplane tissue Doppler imaging to predict acute response to cardiac resynchronization therapy Am J Cardiol 100 476 482 10.1016/j.amjcard.2007.03.051 17659932 (Pubitemid 47096823)
35. NR Van de Veire CM Yu N Ajmone-Marsan GB Bleeker C Ypenburg J De Sutter 2008 Triplane tissue Doppler imaging: a novel three dimensional imaging modality that predicts reverse left ventricular remodelling after cardiac resynchronisation therapy Heart 94 e9 10.1136/hrt.2007.122564 17984218
36. P Lim A Buakhamsri ZB Popovic NL Greenberg D Patel JD Thomas, et al. 2008 Longitudinal strain delay index by speckle tracking imaging: a new marker of response to cardiac resynchronization therapy Circulation 11 1130 1137 10.1161/CIRCULATIONAHA.107.750190
37. Y Abe T Kawagishi H Ohuchi T Takeguchi M Nishiura 2008 Accurate detection of regional contraction using novel 3-dimensional speckle tracking technique J Am Coll Cardiol 51 903 953
38. C Ypenburg RJ Van Bommel V Delgado SA Mollema GB Bleeker E Boersma, et al. 2008 Optimal left ventricular lead position predicts reverse remodeling and survival after cardiac resynchronization therapy J Am Coll Cardiol 17 1402 1409 10.1016/j.jacc.2008.06.046
39. NR Van de Veire NA Marsan JD Schuijf GB Bleeker MC Wijffels L Van Erven, et al. 2008 Noninvasive imaging of cardiac venous anatomy with 64-slice multi-slice computed tomography and noninvasive assessment of left ventricular dyssynchrony by 3-dimensional tissue synchronization imaging in patients with heart failure scheduled for cardiac resynchronization therapy Am J Cardiol 7 1023 1029
40. JW Fung YY Lam Q Zhang GW Yip WW Chan GC Chan, et al. 2008 Effect of left ventricular lead concordance to the delayed contraction segment on echocardiographic and clinical outcomes after cardiac resynchronization therapy J Cardiovasc Electrophysiol 5 536 538
41. GB Bleeker TAM Kaandorp HJ Lamb E Boersma P Steendijk A De Roos, et al. 2006 Effect of posterolateral scar tissue on clinical and echocardiographic improvement after cardiac resynchronization therapy Circulation 113 969 976 10.1161/CIRCULATIONAHA.105.543678 16476852 (Pubitemid 43879472)
42. JP Hummel JR Lindner JT Belcik J Ferguson M Mangrum J Bergin, et al. 2005 Extent of myocardial viability predicts response to biventricular pacing in ischemic cardiomyopathy Heart Rhythm 2 1211 1217 10.1016/j.hrthm.2005.07.027 16253911 (Pubitemid 41614166)
43. R Setser D Bexell T O'Donnell A Stillman M Lieber P Schoenhagen, et al. 2003 Quantitative assessment of myocardial scar in delayed enhancement magnetic resonance imaging J Magn Reson Imaging 18 434 441 10.1002/jmri.10391 14508780 (Pubitemid 37187596)
44. C Ypenburg SD Roes GB Bleeker TA Kaandorp A De Roos MJ Schalij, et al. 2007 Effect of total scar burden on contrast-enhanced magnetic resonance imaging on response to cardiac resynchronization therapy Am J Cardiol 5 657 660 10.1016/j.amjcard.2006.09.115
45. MR Jongbloed HJ Lamb JJ Bax J Schuijf A De Roos E Van der Wall, et al. 2005 Noninvasive evaluation of the cardiac venous system using multislice computed tomography J Am Coll Cardiol 45 749 753 10.1016/j.jacc.2004.11.035 15734621 (Pubitemid 40278974)
46. R Koos AM Sinha K Markus O Breithardt K Mischke M Zarse, et al. 2004 Comparison of left ventricular lead placement via the coronary venous approach versus lateral thoracotomy in patients receiving cardiac resynchronization therapy Am J Cardiol 94 59 63 10.1016/j.amjcard.2004.03.031 15219510 (Pubitemid 38813455)
47. MC Porciani C Dondina R Macioce G Demarchi P Pieragnoli N Musilli, et al. 2005 Echocardiographic examination of atrioventricular and interventricular delay optimization in cardiac resynchronization therapy Am J Cardiol 95 1108 1110 10.1016/j.amjcard.2005.01.028 15842985 (Pubitemid 40544322)
48. Q Zhang JW Fung YS Chan HC Chan H Lin S Chan, et al. 2008 The role of repeating optimization of atrioventricular interval during interim and long-term follow-up after cardiac resynchronization therapy Int J Cardiol 2 211 217 10.1016/j.ijcard.2007.02.043 (Pubitemid 351181339)
49. P Sogaard H Eglebad AK Pedersen W Kim B Kristensen P Hansen, et al. 2002 Sequential versus simultaneous biventricular resynchronization for severe heart failure: evaluation by tissue Doppler imaging Circulation 106 2078 2084 10.1161/01.CIR.0000034512.90874.8E 12379577 (Pubitemid 35203294)
50. M Vanderheyden T De Backer M Rivero-Ayzera P Geelen J Bartunek S Verstreken, et al. 2005 Tailored echocardiographic interventricular delay programming further optimizes left ventricular performance after cardiac resynchronization therapy Heart Rhythm 2 1066 1072 10.1016/j.hrthm.2005.07.016 16188583 (Pubitemid 41472153)
51. AR Leon WT Abraham S Brozena J Daubert W Fisher J Gurley, et al. 2005 Cardiac resynchronization therapy with sequential biventricular pacing for the treatment of moderate-to-severe heart failure J Am Coll Cardiol 46 2298 2304 10.1016/j.jacc.2005.08.032 16360062 (Pubitemid 41785501)
52. WT Abraham WG Fisher AL Smith D Delurgio A Leon E Loh, et al. 2002 Multicenter InSync randomized clinical evaluation. Cardiac resynchronization in chronic heart failure N Engl J Med 346 1845 1853 10.1056/NEJMoa013168 12063368 (Pubitemid 34603028)
53. A Auricchio C Stellbrink C Butter S Sack J Vogt A Misier, et al. 2003 Clinical efficacy of cardiac resynchronization therapy using left ventricular pacing in heart failure patients stratified by severity of ventricular conduction delay J Am Coll Cardiol 42 2109 2116 10.1016/j.jacc.2003.04.003 14680736 (Pubitemid 37549894)
54. JB Young WT Abraham AL Smith A Leon R Lieberman B Wilkoff, et al. 2003 Combined cardiac resynchronization and implantable cardioversion defibrillation in advanced chronic heart failure: the MIRACLE ICD trial JAMA 289 2685 2694 10.1001/jama.289.20.2685 12771115 (Pubitemid 37430139)
55. OA Breithardt AM Sinha E Schwammenthal N Bidaoui K Markus A Franke, et al. 2003 Acute effects of cardiac resynchronization therapy on functional mitral regurgitation in advanced systolic heart failure J Am Coll Cardiol 41 765 770 10.1016/S0735-1097(02)02937-6 12628720 (Pubitemid 36308383)
56. CM Yu E Chau JE Sanderson K Fan M Tang W Fung, et al. 2002 Tissue Doppler echocardiographic evidence of reverse remodeling and improved synchronicity by simultaneously delaying regional contraction after biventricular pacing therapy in heart failure Circulation 105 438 445 10.1161/hc0402.102623 11815425 (Pubitemid 34141699)
57. CM Yu J Fung Q Zhang J Sanderson 2005 Understanding nonresponders of cardiac resynchronization therapy-current and future perspectives J Cardiovasc Electrophysiol 16 1117 1124 10.1111/j.1540-8167.2005.40829.x 16191124
58. JW Fung JY Chan LC Kum HC Chan GW Yip Q Zhang, et al. 2007 Suboptimal medical therapy in patients with systolic heart failure is associated with less improvement by cardiac resynchronization therapy Int J Cardiol 2 214 219 10.1016/j.ijcard.2006.04.034 (Pubitemid 46136523)
59. C Ypenburg A Sieders GB Bleeker ER Holman EE Van der Wall MJ Schalij, et al. 2007 Myocardial contractile reserve predicts improvement in left ventricular function after cardiac resynchronization therapy Am Heart J 6 1160 1165 10.1016/j.ahj.2007.07.035 (Pubitemid 350161774)
60. M Byrne R Helm S Daya N Osman H Halperin R Berger, et al. 2007 Diminished left ventricular dyssynchrony and impact of resynchronization in failing hearts with right versus left bundle branch block J Am Coll Cardiol 15 1484 1490 10.1016/j.jacc.2007.07.011 (Pubitemid 47494595)
61. S Garrigue S Reuter JN Labeque P Jais M Hocini DC Shah, et al. 2001 Usefulness of biventricular pacing in patients with congestive heart failure and right bundle branch block Am J Cardiol 88 1436 1441 10.1016/S0002-9149(01) 02131-2 11741571 (Pubitemid 34008695)
62. S Ghio C Constantin C Klersy A Serio A Fontana C Campana, et al. 2004 Interventricular and intraventricular dyssynchrony are common in heart failure patients, regardless of QRS duration Eur Heart J 25 571 578 10.1016/j.ehj.2003. 09.030 15120054 (Pubitemid 38478550)
63. A Achilli M Sassara S Ficili D Pontillo P Achilli C Alessi S De Spirito R Guerra N Patruno F Serra 2003 Long-term effectiveness of cardiac resynchronization therapy in patients with refractory heart failure and "narrow" QRS J Am Coll Cardiol 42 2117 2124 10.1016/j.jacc.2003.08.024 14680737 (Pubitemid 37549895)
64. MS Turner RA Bleasdale D Vinereanu CE Mumford V Paul AG Fraser, et al. 2004 Electrical and mechanical components of Dyssynchrony in heart failure patients with normal QRS duration and left bundle-branch block: impact of left and biventricular pacing Circulation 109 2544 2549 10.1161/01.CIR.0000131184. 40893.40 15148267 (Pubitemid 38720554)
65. JF Beshai RA Grimm SF Nagueh J Baker S Beau S Greenberg, et al. 2007 Cardiac-resynchronization therapy in heart failure with narrow QRS complexes N Engl J Med 357 2461 2471 10.1056/NEJMoa0706695 17986493 (Pubitemid 350272785)
66. CP Chan Q Zhang GW Yip JW Fung YY Lam PW Lee, et al. 2008 Relation of left ventricular systolic dyssynchrony in patients with heart failure to left ventricular ejection fraction and to QRS duration Am J Cardiol 5 602 605 10.1016/j.amjcard.2008.04.032
67. W Maisel L Stevenson 2003 Atrial fibrillation in heart failure: epidemiology, pathophysiology and rationale for therapy Am J Cardiol 91 2D 8D 10.1016/S0002-9149(02)03373-8 12670636 (Pubitemid 36369329)
68. I Hay V Melenosky B Fetics D Judge A Kramer J Spinelli, et al. 2004 Short-term effects of right-left heart sequential cardiac resynchronization in patients with heart failure, chronic atrial fibrillation and atrioventricular nodal block Circulation 110 3404 3410 10.1161/01.CIR.0000148177.82319.C7 15557370 (Pubitemid 39602218)
69. C Leclercq S Walker C Linde J Clementy A Marshalle P Ritter, et al. 2002 Comparative effects of permanent biventricular and right-univentricular pacing in heart failure patients with chronic atrial fibrillation Eur Heart J 23 1780 1787 10.1053/euhj.2002.3232 12419298 (Pubitemid 35334271)
70. C Linde C Leclercq S Rex, et al. 2002 Long-term benefits of biventricular pacing in congestive heart failure: results from the MUSTIC study J Am Coll Cardiol 40 111 118 10.1016/S0735-1097(02)01932-0 12103264 (Pubitemid 34701385)
71. SG Molhoek JJ Bax GB Bleeker E Boersma L Van Erven P Steendijk, et al. 2004 Comparison of response to cardiac resynchronization therapy in patients with sinus rhythm versus chronic atrial fibrillation Am J Cardiol 94 1506 1509 10.1016/j.amjcard.2004.08.028 15589005 (Pubitemid 40268451)
72. JW Fung GW Yip Q Zhang F Fang JY Chan CM Li, et al. 2008 Improvement of left atrial function is associated with lower incidence of atrial fibrillation and mortality after cardiac resynchronization therapy Heart Rhythm 6 780 786 10.1016/j.hrthm.2008.02.043
73. Q Zhang J Fung G Yip J Chan A Lee Y Lam, et al. 2008 Improvement of left ventricular myocardial short axis, but not long-axis function or torsion after cardiac resynchronisation therapy: an assessment by two-dimensional speckle tracking Heart 94 1464 1471 10.1136/hrt.2007.127498 18198202
74. V Delgado C Ypenburg RJ Van Bommel LF Tops SA Mollema NA Marsan, et al. 2008 Assessment of left ventricular dyssynchrony by speckle tracking strain imaging comparison between longitudinal, circumferential, and radial strain in cardiac resynchronization therapy J Am Coll Cardiol 20 1944 1952 10.1016/j.jacc.2008.02.040 (Pubitemid 351636442)
75. MG St John Sutton T Plappert WT Abraham AL Smith DB DeLurgio AR Leon, et al. 2003 Effect of cardiac resynchronization therapy on left ventricular size and function in chronic heart failure Circulation 15 1985 1990 10.1161/01.CIR.0000065226.24159.E9 (Pubitemid 36506071)
76. A Duncan D Wait D Gibson JC Daubert MUSTIC (Multisite Stimulationin Cardiomyopathies) Trial 2003 Left ventricular remodelling and haemodynamic effects of multisite biventricular pacing in patients with left ventricular systolic dysfunction and activation disturbances in sinus rhythm: sub-study of the MUSTIC (Multisite Stimulationin Cardiomyopathies) trial Eur Heart J 5 430 441 10.1016/S0195-668X(02)00475-X (Pubitemid 36286186)
77. SG Molhoek JJ Bax L Van Erven M Bootsma E Boersma P Steendijk, et al. 2004 Comparison of benefits from cardiac resynchronization therapy in patients with ischemic cardiomyopathy versus idiopathic dilated cardiomyopathy Am J Cardiol 7 860 863 10.1016/j.amjcard.2003.12.024 (Pubitemid 38429597)
78. OA Breithardt C Stellbrink A Franke O Balta BH Diem P Bakker, et al. 2002 Acute effects of cardiac resynchronization therapy on left ventricular Doppler indices in patients with congestive heart failure Am Heart J 1 34 44 10.1067/mhj.2002.119616 (Pubitemid 34056373)
79. Q Zhang JW Fung JY Chan GW Yip YY Lam YJ Liang, et al. 2009 Difference in long-term clinical outcome after cardiac resynchronization therapy between ischemic and non-ischemic etiologies of heart failure Heart 2 113 118 10.1136/hrt.2008.145698
80. C Ypenburg RJ Van Bommel NA Marsan V Delgado GB Bleeker EE Van der Wall, et al. 2008 Effects of interruption of long-term cardiac resynchronization therapy on left ventricular function and dyssynchrony Am J Cardiol 6 718 721 10.1016/j.amjcard.2008.05.009
81. Zagzebski JA (1996) Essentials of ultrasound physics. Mosby Inc., vol 3, pp 57-58, ISBN: 0-8151-9852-3
82. H Pavlopoulos P Nihoyannopoulos 2008 Strain and strain rate deformation parameters: from tissue Doppler to 2D speckle tracking Int J Cardiovasc Imaging 24 479 491 10.1007/s10554-007-9286-9 18074240
83. J D'hooge A Heimdal F Jamal T Kukulski B Bijnens F Rademakers 2000 Regional strain and strain rate measurements by cardiac ultrasound: principles, implementation and limitations Eur J Echocardiogr 1 154 170 10.1053/euje.2000. 0031 11916589
84. R Koos M Neizel G Schummers GA Krombach S Stanzel RW Günther 2008 Feasibility and initial experience of assessment of mechanical dyssynchrony using cardiovascular magnetic resonance and semi-automatic border detection J Cardiovasc Magn Reson 10 49 10.1186/1532-429X-10-49 18983646
85. E Chung A Leon L Tavazzi J Sun P Nihoyannopoulos J Merlino 2008 Results of the predictors of response to CRT(PROSPECT) trial Circulation 117 2608 2616 10.1161/CIRCULATIONAHA.107.743120 18458170