CLINICAL RESEARCH: CARDIAC IMAGING
Measurement of Ventricular Torsion by Two-Dimensional Ultrasound Speckle Tracking Imaging
Yuichi Notomi, MD*,
Peter Lysyansky, PhD ,
Randolph M. Setser, DSc ,
Takahiro Shiota, MD, FACC*,
Zoran B. Popovi , MD*,
Maureen G. Martin-Miklovic,
Joan A. Weaver, RT*,
Stephanie J. Oryszak*,
Neil L. Greenberg, PhD, FACC*,
Richard D. White, MD*, and
James D. Thomas, MD, FACC*,*
* Department of Cardiovascular Medicine, The Cleveland Clinic Foundation, Cleveland, Ohio
Department of Radiology, The Cleveland Clinic Foundation, Cleveland, Ohio
GE Ultrasound Israel Ltd, Tirat Hacarmel, Israel
Manuscript received December 13, 2004;
revised manuscript received February 7, 2005,
accepted February 22, 2005.
* Reprint requests and correspondence to: Dr. James D. Thomas, Department of Cardiovascular Medicine/F15, The Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, Ohio 44195. (Email: thomasj{at}ccf.org).
OBJECTIVES: We sought to examine the accuracy/consistency of a novel ultrasound speckle tracking imaging (STI) method for left ventricular torsion (LVtor) measurement in comparison with tagged magnetic resonance imaging (MRI) (a time-domain method similar to STI) and Doppler tissue imaging (DTI) (a velocity-based approach).
BACKGROUND: Left ventricular torsion from helically oriented myofibers is a key parameter of cardiac performance but is difficult to measure. Ultrasound STI is potentially suitable for measurement of angular motion because of its angle-independence.
METHODS: We acquired basal and apical short-axis left ventricular (LV) images in 15 patients to estimate LVtor by STI and compare it with tagged MRI and DTI. Left ventricular torsion was defined as the net difference of LV rotation at the basal and apical planes. For the STI analysis, we used high-frame (104 ± 12 frames/s) second harmonic two-dimensional images.
RESULTS: Data on 13 of 15 patients were usable for STI analysis, and LVtor profile estimated by STI strongly correlated with those by tagged MRI (y = 0.95x + 0.19, r = 0.93, p < 0.0001, analyzed by repeated-measures regression models). The STI torsional velocity profile also correlated well with that by the DTI method (y = 0.79x + 2.4, r = 0.76, p < 0.0001, by repeated-measures regression models) with acceptable bias.
CONCLUSIONS: The STI estimation of LVtor is concordant with those analyzed by tagged MRI (data derived from tissue displacement) and also showed good agreement with those by DTI (data derived from tissue velocity). Ultrasound STI is a promising new method to assess LV torsional deformation and may make the assessment more available in clinical and research cardiology.
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Abbreviations and Acronyms
| | CV = coefficient of variation | | DTI = Doppler tissue imaging | | LV = left ventricular | | LVrot = left ventricular rotation | | LVrot-v = left ventricular rotational velocity | | LVtor = left ventricular torsion | | LVtor-v = left ventricular torsional velocity | | MRI = magnetic resonance imaging | | STI = speckle tracking imaging |
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|
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|
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|
|
|
|
|
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54(14):
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|
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|
|
|
|
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54(14):
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|
|
|
|
|
|
|
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|
|
|
|
|
|
|
Y. Peng, Z. B. Popovic, N. Sopko, J. Drinko, Z. Zhang, J. D. Thomas, and M. S. Penn
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297(2):
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[PDF]
|
|
|
|
|
|
|
S. Nottin, G. Doucende, I. Schuster, S. Tanguy, M. Dauzat, and P. Obert
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Circ Cardiovasc Imaging,
July 1, 2009;
2(4):
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|
|
|
|
|
|
|
D. Oxborough, A. M. Batterham, R. Shave, N. Artis, K. M. Birch, G. Whyte, P. N. Ainslie, and K. P. George
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July 1, 2009;
10(5):
677 - 682.
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|
|
|
|
|
|
|
V. Ferferieva, P. Claus, K. Vermeulen, C. Missant, M. Szulik, F. Rademakers, and J. D'hooge
Echocardiographic assessment of left ventricular untwist rate: comparison of tissue Doppler and speckle tracking methodologies
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July 1, 2009;
10(5):
683 - 690.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
B. M. van Dalen, O. I.I. Soliman, W. B. Vletter, F. Kauer, H. B. van der Zwaan, F. J. ten Cate, and M. L. Geleijnse
Feasibility and reproducibility of left ventricular rotation parameters measured by speckle tracking echocardiography
Eur J Echocardiogr,
July 1, 2009;
10(5):
669 - 676.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
T. Helle-Valle, E. W. Remme, E. Lyseggen, E. Pettersen, T. Vartdal, A. Opdahl, H.-J. Smith, N. F. Osman, H. Ihlen, T. Edvardsen, et al.
Clinical assessment of left ventricular rotation and strain: a novel approach for quantification of function in infarcted myocardium and its border zones
Am J Physiol Heart Circ Physiol,
July 1, 2009;
297(1):
H257 - H267.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
Z. B. Popovic and J. D. Thomas
Echocardiography and a quest of the promised land of the accurate assessment of cardiac mechanics
Eur J Echocardiogr,
July 1, 2009;
10(5):
583 - 584.
[Full Text]
[PDF]
|
|
|
|
|
|
|
Y. T. Tan, F. Wenzelburger, E. Lee, G. Heatlie, F. Leyva, K. Patel, M. Frenneaux, and J. E. Sanderson
The pathophysiology of heart failure with normal ejection fraction exercise echocardiography reveals complex abnormalities of both systolic and diastolic ventricular function involving torsion, untwist, and longitudinal motion.
J. Am. Coll. Cardiol.,
June 30, 2009;
54(1):
36 - 46.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
A. T. Burns, A. La Gerche, D. L. Prior, and A. I. MacIsaac
Left Ventricular Untwisting Is an Important Determinant of Early Diastolic Function
J. Am. Coll. Cardiol. Img.,
June 1, 2009;
2(6):
709 - 716.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
N. M. Hawkins, M. C. Petrie, M. I. Burgess, and J. J.V. McMurray
Selecting patients for cardiac resynchronization therapy: the fallacy of echocardiographic dyssynchrony.
J. Am. Coll. Cardiol.,
May 26, 2009;
53(21):
1944 - 1959.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
A. Buakhamsri, Z. B. Popovic, J. Lin, P. Lim, N. L. Greenberg, A. G. Borowski, W.H. W. Tang, A. L. Klein, H. M. Lever, M. Y. Desai, et al.
Impact of left ventricular volume/mass ratio on diastolic function
Eur. Heart J.,
May 2, 2009;
30(10):
1213 - 1221.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
I. K. Russel, M. J.W. Gotte, J. G. Bronzwaer, P. Knaapen, W. J. Paulus, and A. C. van Rossum
Left ventricular torsion an expanding role in the analysis of myocardial dysfunction.
J. Am. Coll. Cardiol. Img.,
May 1, 2009;
2(5):
648 - 655.
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[Full Text]
[PDF]
|
|
|
|
|
|
|
J. Wang and S. F. Nagueh
Current Perspectives on Cardiac Function in Patients With Diastolic Heart Failure
Circulation,
March 3, 2009;
119(8):
1146 - 1157.
[Full Text]
[PDF]
|
|
|
|
|
|
|
C. Goffinet, F. Chenot, A. Robert, A.-C. Pouleur, J.-B. l. P. de Waroux, D. Vancrayenest, O. Gerard, A. Pasquet, B. L. Gerber, and J.-L. Vanoverschelde
Assessment of subendocardial vs. subepicardial left ventricular rotation and twist using two-dimensional speckle tracking echocardiography: comparison with tagged cardiac magnetic resonance
Eur. Heart J.,
March 1, 2009;
30(5):
608 - 617.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
S. F. Nagueh, C. P. Appleton, T. C. Gillebert, P. N. Marino, J. K. Oh, O. A. Smiseth, A. D. Waggoner, F. A. Flachskampf, P. A. Pellikka, and A. Evangelisa
Recommendations for the Evaluation of Left Ventricular Diastolic Function by Echocardiography
Eur J Echocardiogr,
March 1, 2009;
10(2):
165 - 193.
[Full Text]
[PDF]
|
|
|
|
|
|
|
B. T. Esch and D. E. R. Warburton
Left ventricular torsion and recoil: implications for exercise performance and cardiovascular disease
J Appl Physiol,
February 1, 2009;
106(2):
362 - 369.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
M Saito, H Okayama, K Nishimura, A Ogimoto, T Ohtsuka, K Inoue, G Hiasa, T Sumimoto, J Funada, Y Shigematsu, et al.
Determinants of left ventricular untwisting behaviour in patients with dilated cardiomyopathy: analysis by two-dimensional speckle tracking
Heart,
February 1, 2009;
95(4):
290 - 296.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
C. Tousignant
CON: Intraoperative Doppler Tissue Imaging Is a Valuable Addition to Cardiac Anesthesiologists' Armamentarium
Anesth. Analg.,
January 1, 2009;
108(1):
41 - 47.
[Full Text]
[PDF]
|
|
|
|
|
|
|
T. Nishikage, H. Nakai, V. Mor-Avi, R. M. Lang, I. S. Salgo, S. H. Settlemier, S. Husson, and M. Takeuchi
Quantitative assessment of left ventricular volume and ejection fraction using two-dimensional speckle tracking echocardiography
Eur J Echocardiogr,
January 1, 2009;
10(1):
82 - 88.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
C. W. McIntyre, S. G. John, and H. J. Jefferies
Advances in the cardiovascular assessment of patients with chronic kidney disease
NDT Plus,
December 1, 2008;
1(6):
383 - 391.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
L. C. Afonso, J. Bernal, J. J. Bax, and T. P. Abraham
Echocardiography in hypertrophic cardiomyopathy: the role of conventional and emerging technologies.
J. Am. Coll. Cardiol. Img.,
November 1, 2008;
1(6):
787 - 800.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
R. Perry, C. G. De Pasquale, D. P. Chew, and M. X. Joseph
Assessment of early diastolic left ventricular function by two-dimensional echocardiographic speckle tracking
Eur J Echocardiogr,
November 1, 2008;
9(6):
791 - 795.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
J. Ganame, R. H. Pignatelli, B. W. Eidem, P. Claus, J. D'hooge, C. J. McMahon, G. Buyse, J. A. Towbin, N. A. Ayres, and L. Mertens
Myocardial deformation abnormalities in paediatric hypertrophic cardiomyopathy: are all aetiologies identical?
Eur J Echocardiogr,
November 1, 2008;
9(6):
784 - 790.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
Q Zhang, J W-H Fung, G W K Yip, J Y-S Chan, A P-W Lee, Y-Y Lam, L-W Wu, E B Wu, and C-M Yu
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,
November 1, 2008;
94(11):
1464 - 1471.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
B. M. van Dalen, O. I. I. Soliman, W. B. Vletter, F. J. ten Cate, and M. L. Geleijnse
Age-related changes in the biomechanics of left ventricular twist measured by speckle tracking echocardiography
Am J Physiol Heart Circ Physiol,
October 1, 2008;
295(4):
H1705 - H1711.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
A T Burns, I G McDonald, J D Thomas, A MacIsaac, and D Prior
Doin' the twist: new tools for an old concept of myocardial function
Heart,
August 1, 2008;
94(8):
978 - 983.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
S. De Castro, F. Faletra, E. Di Angelantonio, C. Conca, A. Marcantonio, M. Francone, D. Cartoni, F. Mirabelli, C. Gaudio, S. Caselli, et al.
Tomographic Left Ventricular Volumetric Emptying Analysis by Real-Time 3-Dimensional Echocardiography: Influence of Left Ventricular Dysfunction With and Without Electrical Dyssynchrony
Circ Cardiovasc Imaging,
July 1, 2008;
1(1):
41 - 49.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
R S Gabriel, A J Kerr, V Sharma, I S L Zeng, and R A H Stewart
B-type natriuretic peptide and left ventricular dysfunction on exercise echocardiography in patients with chronic aortic regurgitation
Heart,
July 1, 2008;
94(7):
897 - 902.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
J. Wang, D. S. Khoury, Y. Yue, G. Torre-Amione, and S. F. Nagueh
Preserved left ventricular twist and circumferential deformation, but depressed longitudinal and radial deformation in patients with diastolic heart failure
Eur. Heart J.,
May 2, 2008;
29(10):
1283 - 1289.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
P. P. Sengupta, A. J. Tajik, K. Chandrasekaran, and B. K. Khandheria
Twist mechanics of the left ventricle principles and application.
J. Am. Coll. Cardiol. Img.,
May 1, 2008;
1(3):
366 - 376.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
A N Borg, J L Harrison, R A Argyle, and S G Ray
Left ventricular torsion in primary chronic mitral regurgitation
Heart,
May 1, 2008;
94(5):
597 - 603.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
Z B Popovic, R A Grimm, A Ahmad, D Agler, M Favia, G Dan, P Lim, F Casas, N L Greenberg, and J D Thomas
Longitudinal rotation: an unrecognised motion pattern in patients with dilated cardiomyopathy
Heart,
March 1, 2008;
94(3):
e11 - e11.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
P. P. Sengupta, V. K. Krishnamoorthy, W. P. Abhayaratna, J. Korinek, M. Belohlavek, T. M. Sundt III, K. Chandrasekaran, F. Mookadam, J. B. Seward, A. J. Tajik, et al.
Disparate patterns of left ventricular mechanics differentiate constrictive pericarditis from restrictive cardiomyopathy.
J. Am. Coll. Cardiol. Img.,
January 1, 2008;
1(1):
29 - 38.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
H. Rakowski and S. Carasso
Quantifying Diastolic Function in Hypertrophic Cardiomyopathy: The Ongoing Search for the Holy Grail
Circulation,
December 4, 2007;
116(23):
2662 - 2665.
[Full Text]
[PDF]
|
|
|
|
|
|
|
J. Ganame, L. Mertens, B. W. Eidem, P. Claus, J. D'hooge, L. M. Havemann, C. J. McMahon, M. A. A. Elayda, W. K. Vaughn, J. A. Towbin, et al.
Regional myocardial deformation in children with hypertrophic cardiomyopathy: morphological and clinical correlations
Eur. Heart J.,
December 1, 2007;
28(23):
2886 - 2894.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
T. P. Abraham, V. L. Dimaano, and H.-Y. Liang
Role of Tissue Doppler and Strain Echocardiography in Current Clinical Practice
Circulation,
November 27, 2007;
116(22):
2597 - 2609.
[Full Text]
[PDF]
|
|
|
|
|
|
|
J. Wang, D. S. Khoury, Y. Yue, G. Torre-Amione, and S. F. Nagueh
Left Ventricular Untwisting Rate by Speckle Tracking Echocardiography
Circulation,
November 27, 2007;
116(22):
2580 - 2586.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
M. Takeuchi, W. B. Borden, H. Nakai, T. Nishikage, M. Kokumai, T. Nagakura, S. Otani, and R. M Lang
Reduced and delayed untwisting of the left ventricle in patients with hypertension and left ventricular hypertrophy: a study using two-dimensional speckle tracking imaging
Eur. Heart J.,
November 2, 2007;
28(22):
2756 - 2762.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
A. D'Andrea, P. Caso, S. Romano, R. Scarafile, L. Riegler, G. Salerno, G. Limongelli, G. Di Salvo, P. Calabro, L. Del Viscovo, et al.
Different effects of cardiac resynchronization therapy on left atrial function in patients with either idiopathic or ischaemic dilated cardiomyopathy: a two-dimensional speckle strain study
Eur. Heart J.,
November 2, 2007;
28(22):
2738 - 2748.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
J. Gorcsan III, M. Tanabe, G. B. Bleeker, M. S. Suffoletto, N. C. Thomas, S. Saba, L. F. Tops, M. J. Schalij, and J. J. Bax
Combined Longitudinal and Radial Dyssynchrony Predicts Ventricular Response After Resynchronization Therapy
J. Am. Coll. Cardiol.,
October 9, 2007;
50(15):
1476 - 1483.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
M. I Burgess, C. Jenkins, J. Chan, and T. H Marwick
Measurement of left ventricular dyssynchrony in patients with ischaemic cardiomyopathy: a comparison of real-time three-dimensional and tissue Doppler echocardiography
Heart,
October 1, 2007;
93(10):
1191 - 1196.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
L. F. Tops, M. S. Suffoletto, G. B. Bleeker, E. Boersma, E. E. van der Wall, J. Gorcsan III, M. J. Schalij, and J. J. Bax
Speckle-Tracking Radial Strain Reveals Left Ventricular Dyssynchrony in Patients With Permanent Right Ventricular Pacing
J. Am. Coll. Cardiol.,
September 18, 2007;
50(12):
1180 - 1188.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
J. N. Kirkpatrick, M. A. Vannan, J. Narula, and R. M. Lang
Echocardiography in Heart Failure: Applications, Utility, and New Horizons
J. Am. Coll. Cardiol.,
July 31, 2007;
50(5):
381 - 396.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
Z. B. Popovic, C. Benejam, J. Bian, N. Mal, J. Drinko, K. Lee, F. Forudi, R. Reeg, N. L. Greenberg, J. D. Thomas, et al.
Speckle-tracking echocardiography correctly identifies segmental left ventricular dysfunction induced by scarring in a rat model of myocardial infarction
Am J Physiol Heart Circ Physiol,
June 1, 2007;
292(6):
H2809 - H2816.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
A. E. Weyman
The Year in Echocardiography
J. Am. Coll. Cardiol.,
March 20, 2007;
49(11):
1212 - 1219.
[Full Text]
[PDF]
|
|
|
|
|
|
|
J. D. Thomas and Z. B. Popovic
Assessment of Left Ventricular Function by Cardiac Ultrasound
J. Am. Coll. Cardiol.,
November 21, 2006;
48(10):
2012 - 2025.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
P. P. Sengupta, J. Korinek, M. Belohlavek, J. Narula, M. A. Vannan, A. Jahangir, and B. K. Khandheria
Left Ventricular Structure and Function: Basic Science for Cardiac Imaging
J. Am. Coll. Cardiol.,
November 21, 2006;
48(10):
1988 - 2001.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
M. Ashraf, X. K. Li, M. T. Young, A. J. Jensen, J. Pemberton, L. Hui, P. Lysyansky, Z. Friedman, B. Park, and D. J. Sahn
Delineation of cardiac twist by a sonographically based 2-dimensional strain analysis method: an in vitro validation study.
J. Ultrasound Med.,
September 1, 2006;
25(9):
1193 - 1198.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
E. Foster and K. E. Lease
New Untwist on Diastole: What Goes Around Comes Back
Circulation,
May 30, 2006;
113(21):
2477 - 2479.
[Full Text]
[PDF]
|
|
|
|
|
|
|
Y. Notomi, G. Srinath, T. Shiota, M. G. Martin-Miklovic, L. Beachler, K. Howell, S. J. Oryszak, D. G. Deserranno, A. D. Freed, N. L. Greenberg, et al.
Maturational and Adaptive Modulation of Left Ventricular Torsional Biomechanics: Doppler Tissue Imaging Observation From Infancy to Adulthood
Circulation,
May 30, 2006;
113(21):
2534 - 2541.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
Y. Notomi, M. G. Martin-Miklovic, S. J. Oryszak, T. Shiota, D. Deserranno, Z. B. Popovic, M. J. Garcia, N. L. Greenberg, and J. D. Thomas
Enhanced Ventricular Untwisting During Exercise: A Mechanistic Manifestation of Elastic Recoil Described by Doppler Tissue Imaging
Circulation,
May 30, 2006;
113(21):
2524 - 2533.
[Abstract]
[Full Text]
[PDF]
|
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T. H. Marwick
Measurement of Strain and Strain Rate by Echocardiography: Ready for Prime Time?
J. Am. Coll. Cardiol.,
April 4, 2006;
47(7):
1313 - 1327.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
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A. E. Weyman
The Year in Echocardiography
J. Am. Coll. Cardiol.,
February 21, 2006;
47(4):
856 - 863.
[Full Text]
[PDF]
|
|
|
|
|
|
|
M. S. Suffoletto, K. Dohi, M. Cannesson, S. Saba, and J. Gorcsan III
Novel Speckle-Tracking Radial Strain From Routine Black-and-White Echocardiographic Images to Quantify Dyssynchrony and Predict Response to Cardiac Resynchronization Therapy
Circulation,
February 21, 2006;
113(7):
960 - 968.
[Abstract]
[Full Text]
[PDF]
|
|
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|
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A. N. DeMaria, O. Ben-Yehuda, D. Berman, G. K. Feld, G. S. Ginsburg, B. H. Greenberg, W. Y.W. Lew, D. Sahn, and S. Tsimikas
Highlights of the Year in JACC 2005
J. Am. Coll. Cardiol.,
January 3, 2006;
47(1):
184 - 202.
[Full Text]
[PDF]
|
|
|
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