101
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Contractile Dysfunction in Sarcomeric Hypertrophic Cardiomyopathy. J Card Fail 2016; 22:731-7. [DOI: 10.1016/j.cardfail.2016.03.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 03/06/2016] [Accepted: 03/18/2016] [Indexed: 12/29/2022]
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102
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Two-dimensional and three-dimensional left ventricular deformation analysis: a study in competitive athletes. Int J Cardiovasc Imaging 2016; 32:1697-1705. [DOI: 10.1007/s10554-016-0961-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Accepted: 08/08/2016] [Indexed: 10/21/2022]
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103
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Wu LM, Chen BH, Yao QY, Ou YR, Wu R, Jiang M, Hu J, An DA, Xu JR. Quantitative diffusion-weighted magnetic resonance imaging in the assessment of myocardial fibrosis in hypertrophic cardiomyopathy compared with T1 mapping. Int J Cardiovasc Imaging 2016; 32:1289-97. [PMID: 27198892 DOI: 10.1007/s10554-016-0909-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Accepted: 05/05/2016] [Indexed: 11/29/2022]
Abstract
To identify myocardial fibrosis in hypertrophic cardiomyopathy (HCM) subjects using quantitative cardiac diffusion-weighted imaging (DWI) and to compare its performance with native T1 mapping and extracellular volume (ECV). Thirty-eight HCM subjects (mean age, 53 ± 9 years) and 14 normal controls (mean age, 51 ± 8 years) underwent cardiac magnetic resonance imaging (CMRI) on a 3.0T magnetic resonance (MR) machine with DWI, T1 mapping and late gadolinium enhancement (LGE) imaging as the reference standard. The mean apparent diffusion coefficient (ADC), native T1 value and ECV were determined for each subject. Overall, the HCM subjects exhibited an increased native T1 value (1241.04 ± 78.50 ms), ECV (0.31 ± 0.03) and ADC (2.36 ± 0.34 s/mm(2)) compared with the normal controls (1114.60 ± 37.99 ms, 0.24 ± 0.04, and 1.62 ± 0.38 s/mm(2), respectively) (p < 0.05). DWI differentiated healthy and fibrotic myocardia with an area under the curve (AUC) of 0.93, while the AUCs of the native T1 values (0.93), (p > 0.05) and ECV (0.94), (p > 0.05) exhibited an equal differentiation ability. Both HCM LGE+ and HCM LGE- subjects had an increased native T1 value, ECV and ADC compared to the normal controls (p < 0.05). HCM LGE+ subjects exhibited an increased ECV (0.31 ± 0.04) and ADC (2.43 ± 0.36 s/mm(2)) compared to HCM LGE- subjects (p < 0.05). HCM LGE+ and HCM LGE- subjects had similar native T1 values (1250 ± 76.36 ms vs. 1213.98 ± 92.30 ms, respectively) (p > 0.05). ADC values were linearly associated with increased ECV (R(2) = 0.36) and native T1 values (R(2) = 0.40) among all subjects. DWI is a feasible alternative to native T1 mapping and ECV for the identification of myocardial fibrosis in patients with HCM. DWI and ECV can quantitatively characterize the extent of fibrosis in HCM LGE+ and HCM LGE- patients.
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Affiliation(s)
- Lian-Ming Wu
- Department of Radiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Bing-Hua Chen
- Department of Radiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Qiu-Ying Yao
- Department of Radiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yang-Rongzheng Ou
- Department of Radiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Rui Wu
- Department of Radiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Meng Jiang
- Department of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Jiani Hu
- Department of Radiology, Wayne State University, Detroit, MI, USA
| | - Dong-Aolei An
- Department of Radiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Jian-Rong Xu
- Department of Radiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.
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104
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Liu D, Hu K, Nordbeck P, Ertl G, Störk S, Weidemann F. Longitudinal strain bull's eye plot patterns in patients with cardiomyopathy and concentric left ventricular hypertrophy. Eur J Med Res 2016; 21:21. [PMID: 27165726 PMCID: PMC4862218 DOI: 10.1186/s40001-016-0216-y] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Accepted: 05/02/2016] [Indexed: 02/06/2023] Open
Abstract
Despite substantial advances in the imaging techniques and pathophysiological understanding over the last decades, identification of the underlying causes of left ventricular hypertrophy by means of echocardiographic examination remains a challenge in current clinical practice. The longitudinal strain bull’s eye plot derived from 2D speckle tracking imaging offers an intuitive visual overview of the global and regional left ventricular myocardial function in a single diagram. The bull’s eye mapping is clinically feasible and the plot patterns could provide clues to the etiology of cardiomyopathies. The present review summarizes the longitudinal strain, bull’s eye plot features in patients with various cardiomyopathies and concentric left ventricular hypertrophy and the bull’s eye plot features might serve as one of the cardiac workup steps on evaluating patients with left ventricular hypertrophy.
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Affiliation(s)
- Dan Liu
- Comprehensive Heart Failure Center, Würzburg, Germany.,Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany
| | - Kai Hu
- Comprehensive Heart Failure Center, Würzburg, Germany.,Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany
| | - Peter Nordbeck
- Comprehensive Heart Failure Center, Würzburg, Germany.,Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany
| | - Georg Ertl
- Comprehensive Heart Failure Center, Würzburg, Germany.,Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany
| | - Stefan Störk
- Comprehensive Heart Failure Center, Würzburg, Germany.,Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany
| | - Frank Weidemann
- Comprehensive Heart Failure Center, Würzburg, Germany. .,Innere Klinik II, Medical Clinic II, Katharinen-Hospital, Obere Husemannstraße 2, 59423, Unna, Germany.
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105
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Streiff C, Zhu M, Shimada E, Sahn DJ, Ashraf M. Mitigation of Variability among 3D Echocardiography-Derived Regional Strain Values Acquired by Multiple Ultrasound Systems by Vendor Independent Analysis. PLoS One 2016; 11:e0153634. [PMID: 27149685 PMCID: PMC4858214 DOI: 10.1371/journal.pone.0153634] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Accepted: 04/01/2016] [Indexed: 11/25/2022] Open
Abstract
Introduction This study compared the variability of 3D echo derived circumferential and longitudinal strain values computed from vendor-specific and vendor-independent analyses of images acquired using ultrasound systems from different vendors. Methods Ten freshly harvested porcine hearts were studied. Each heart was mounted on a custom designed phantom and driven to simulate normal cardiac motion. Cardiac rotation was digitally controlled and held constant at 5°, while pumped stroke volume (SV) ranged from 30-70ml. Full-volume image data was acquired using three different ultrasound systems from different vendors. The image data was analyzed for longitudinal and circumferential strains (LS, CS) using both vendor-specific and vendor-independent analysis packages. Results Good linear relationships were observed for each vendor-specific analysis package for both CS and LS at the mid-anterior segment, with correlation coefficients ranging from 0.82–0.91 (CS) and 0.86–0.89 (LS). Comparable linear regressions were observed for results determined by a vendor independent program (CS: R = 0.82–0.89; LS: R = 0.86–0.89). Variability between analysis packages was examined via a series of ANOVA tests. A statistical difference was found between vendor-specific analysis packages (p<0.001), while no such difference was observed between ultrasound systems when using the vendor-independent program (p>0.05). Conclusions Circumferential and longitudinal regional strain values differ when quantified by vendor-specific analysis packages; however, this variability is mitigated by use of a vendor-independent quantification method. These results suggest that echocardiograms acquired using different ultrasound systems could be meaningfully compared using vendor-independent software.
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Affiliation(s)
- Cole Streiff
- Oregon Health & Science University, Portland, Oregon, United States of America
| | - Meihua Zhu
- Oregon Health & Science University, Portland, Oregon, United States of America
| | - Eriko Shimada
- Oregon Health & Science University, Portland, Oregon, United States of America
| | - David J. Sahn
- Oregon Health & Science University, Portland, Oregon, United States of America
| | - Muhammad Ashraf
- Oregon Health & Science University, Portland, Oregon, United States of America
- * E-mail:
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106
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Peña-Peña ML, Gonzalvez-Garcia A, Navarro-Herrero S, Lucena-Romero J, Sanchez-Gomez A, Gonzalez-Campora R, Serrano-Gotarredona MP, Lopez-Pardo F, Lopez-Haldon JE, Urbano-Moral JA. Hypertrophic cardiomyopathy: The heart of the matter by looking into the matter of the heart. Int J Cardiol 2016; 203:573-4. [PMID: 26569366 DOI: 10.1016/j.ijcard.2015.10.232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 10/30/2015] [Indexed: 10/22/2022]
Affiliation(s)
- Maria Luisa Peña-Peña
- Center for Inherited Cardiovascular Diseases, Virgen del Rocio University Hospital, Seville, Spain; Cardiovascular Imaging Laboratory, Virgen del Rocio University Hospital, Seville, Spain
| | | | | | | | - Ana Sanchez-Gomez
- Forensic Pathology Department, Institute of Legal Medicine, Seville, Spain
| | | | | | - Francisco Lopez-Pardo
- Cardiovascular Imaging Laboratory, Virgen del Rocio University Hospital, Seville, Spain
| | - Jose Eduardo Lopez-Haldon
- Center for Inherited Cardiovascular Diseases, Virgen del Rocio University Hospital, Seville, Spain; Cardiovascular Imaging Laboratory, Virgen del Rocio University Hospital, Seville, Spain
| | - Jose Angel Urbano-Moral
- Center for Inherited Cardiovascular Diseases, Virgen del Rocio University Hospital, Seville, Spain; Cardiovascular Imaging Laboratory, Virgen del Rocio University Hospital, Seville, Spain.
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107
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Roşca M, Călin A, Beladan CC, Enache R, Mateescu AD, Gurzun MM, Varga P, Băicuş C, Coman IM, Jurcuţ R, Ginghină C, Popescu BA. Right Ventricular Remodeling, Its Correlates, and Its Clinical Impact in Hypertrophic Cardiomyopathy. J Am Soc Echocardiogr 2015; 28:1329-38. [DOI: 10.1016/j.echo.2015.07.015] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Indexed: 10/23/2022]
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108
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Okada K, Yamada S, Iwano H, Nishino H, Nakabachi M, Yokoyama S, Abe A, Ichikawa A, Kaga S, Nishida M, Hayashi T, Murai D, Mikami T, Tsutsui H. Myocardial shortening in 3 orthogonal directions and its transmural variation in patients with nonobstructive hypertrophic cardiomyopathy. Circ J 2015; 79:2471-9. [PMID: 26354501 DOI: 10.1253/circj.cj-15-0646] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND Although longitudinal strain (LS) is known to be reduced in patients with hypertrophic cardiomyopathy (HCM), it has not been elucidated whether or not circumferential strain (CS) is reduced. We aimed to determine whether multidirectional and layer-specific myocardial strain is reduced in patients with nonobstructive HCM. METHODS AND RESULTS Speckle-tracking echocardiography was performed in 41 HCM patients and 27 control subjects. Segmental and global LS and CS were measured in the inner, mid, and outer layers. Global LS was significantly lower in the HCM group than in controls in the inner (-10.3±2.9 vs. -14.8±2.0%, P<0.001), mid (-8.7±2.6 vs. -13.8±1.9%, P<0.001), and outer (-7.2±2.6 vs. -11.9±1.9%, P<0.001) layers. Global CS was preserved in the inner layer (-23.8±4.7 vs. -24.3±3.3%, P=0.69) but reduced in the mid (-10.3±3.1 vs. -13.3±2.5%, P<0.001) and outer layers (-6.7±2.3 vs. -8.6±2.3%, P=0.002). Differences in CS between the inner and outer layers correlated with segmental relative wall thickness (r=-0.20, P=0.002). Furthermore, only the absolute value of global CS in the inner layer positively correlated with left ventricular ejection fraction (r=0.32, P<0.01) among these multidirectional and layer-specific strains. CONCLUSIONS In patients with HCM, not only the LS in all layers but also CS in the mid and outer layers was reduced, presumably reflecting impaired myocardial function. In contrast, CS in the inner layer was preserved, being associated with maintenance of chamber function.
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109
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Impact of Global and Segmental Hypertrophy on Two-Dimensional Strain Derived from Three-Dimensional Echocardiography in Hypertrophic Cardiomyopathy: Comparison with Healthy Subjects. J Am Soc Echocardiogr 2015; 28:1093-102. [DOI: 10.1016/j.echo.2015.03.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Indexed: 11/22/2022]
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110
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Urbano-Moral JA, Gangadharamurthy D, Comenzo RL, Pandian NG, Patel AR. Ecocardiografía speckle tracking (rastreo de marcas) tridimensional en la amiloidosis cardiaca de cadenas ligeras: estudio de los parámetros de mecánica miocárdica ventricular izquierda y derecha. Rev Esp Cardiol 2015. [DOI: 10.1016/j.recesp.2015.01.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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111
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Nucifora G, Muser D, Gianfagna P, Morocutti G, Proclemer A. Systolic and diastolic myocardial mechanics in hypertrophic cardiomyopathy and their link to the extent of hypertrophy, replacement fibrosis and interstitial fibrosis. Int J Cardiovasc Imaging 2015. [PMID: 26210792 DOI: 10.1007/s10554-015-0720-0] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Aim of the present study was to investigate the relations between myocardial mechanics and the extent of hypertrophy and fibrosis in hypertrophic cardiomyopathy (HCM). Forty-five consecutive patients with HCM and 15 subjects without structural heart disease were included. Cardiac magnetic resonance with late gadolinium enhancement (LGE) imaging was performed to evaluate biventricular function, LV mass index and presence/extent of LGE, expression of replacement fibrosis. Myocardial T1 relaxation, a surrogate of interstitial fibrosis, was measured from Look-Locker sequence. Feature-tracking analysis was applied to LV basal, mid and apical short-axis images to assess systolic and diastolic global LV circumferential strain (CS) and strain rate (CSr). Peak systolic CS and CSr were significantly higher among HCM patients as compared to control subjects (p = 0.015 and p = 0.007, respectively). The ratio of peak CSr during early filling to peak systolic CSr was significantly lower among HCM patients (p = 0.002). At multivariate linear regression analysis, LV mass index (p < 0.001) and %LV LGE (p = 0.011) were significantly and independently related to peak systolic CS; LV mass index (p < 0.001) and %LV LGE (p = 0.023) were significantly and independently related to peak systolic CSr; %LV LGE (p = 0.021) and T1 ratio (p = 0.006) were significantly and independently related to the ratio of peak CSr during early filling to peak systolic CSr. LV systolic mechanics are enhanced and LV diastolic mechanics are impaired in HCM. Extent of hypertrophy and replacement fibrosis influence the LV systolic mechanics while extent of replacement fibrosis and interstitial fibrosis influence the LV diastolic mechanics.
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Affiliation(s)
- Gaetano Nucifora
- Division of Cardiology, Cardiothoracic Department, University Hospital "Santa Maria della Misericordia", Udine, Italy.
| | - Daniele Muser
- Division of Cardiology, Cardiothoracic Department, University Hospital "Santa Maria della Misericordia", Udine, Italy
| | - Pasquale Gianfagna
- Division of Cardiology, Cardiothoracic Department, University Hospital "Santa Maria della Misericordia", Udine, Italy
| | - Giorgio Morocutti
- Division of Cardiology, Cardiothoracic Department, University Hospital "Santa Maria della Misericordia", Udine, Italy
| | - Alessandro Proclemer
- Division of Cardiology, Cardiothoracic Department, University Hospital "Santa Maria della Misericordia", Udine, Italy
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112
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Heinzel FR, Hohendanner F, Jin G, Sedej S, Edelmann F. Myocardial hypertrophy and its role in heart failure with preserved ejection fraction. J Appl Physiol (1985) 2015; 119:1233-42. [PMID: 26183480 DOI: 10.1152/japplphysiol.00374.2015] [Citation(s) in RCA: 89] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Accepted: 07/15/2015] [Indexed: 01/09/2023] Open
Abstract
Left ventricular hypertrophy (LVH) is the most common myocardial structural abnormality associated with heart failure with preserved ejection fraction (HFpEF). LVH is driven by neurohumoral activation, increased mechanical load, and cytokines associated with arterial hypertension, chronic kidney disease, diabetes, and other comorbidities. Here we discuss the experimental and clinical evidence that links LVH to diastolic dysfunction and qualifies LVH as one diagnostic marker for HFpEF. Mechanisms leading to diastolic dysfunction in LVH are incompletely understood, but may include extracellular matrix changes, vascular dysfunction, as well as altered cardiomyocyte mechano-elastical properties. Beating cardiomyocytes from HFpEF patients have not yet been studied, but we and others have shown increased Ca(2+) turnover and impaired relaxation in cardiomyocytes from hypertrophied hearts. Structural myocardial remodeling can lead to heterogeneity in regional myocardial contractile function, which contributes to diastolic dysfunction in HFpEF. In the clinical setting of patients with compound comorbidities, diastolic dysfunction may occur independently of LVH. This may be one explanation why current approaches to reduce LVH have not been effective to improve symptoms and prognosis in HFpEF. Exercise training, on the other hand, in clinical trials improved exercise tolerance and diastolic function, but did not reduce LVH. Thus current clinical evidence does not support regression of LVH as a surrogate marker for (short-term) improvement of HFpEF.
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Affiliation(s)
- Frank R Heinzel
- Department of Cardiology, Charité-Universitätsmedizin Berlin, Campus Virchow-Klinikum, Berlin, Germany;
| | - Felix Hohendanner
- Department of Cardiology, Charité-Universitätsmedizin Berlin, Campus Virchow-Klinikum, Berlin, Germany
| | - Ge Jin
- Cardiology Department, The Second Affiliated Hospital & YuYing Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, P. R. China; and Division of Cardiology, Medical University of Graz, Graz, Austria
| | - Simon Sedej
- Division of Cardiology, Medical University of Graz, Graz, Austria
| | - Frank Edelmann
- Department of Cardiology, Charité-Universitätsmedizin Berlin, Campus Virchow-Klinikum, Berlin, Germany
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113
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Urbano-Moral JA, Gangadharamurthy D, Comenzo RL, Pandian NG, Patel AR. Three-dimensional Speckle Tracking Echocardiography in Light Chain Cardiac Amyloidosis: Examination of Left and Right Ventricular Myocardial Mechanics Parameters. ACTA ACUST UNITED AC 2015; 68:657-64. [PMID: 26092748 DOI: 10.1016/j.rec.2015.01.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Accepted: 01/30/2015] [Indexed: 12/12/2022]
Abstract
INTRODUCTION AND OBJECTIVES The study of myocardial mechanics has a potential role in the detection of cardiac involvement in patients with amyloidosis. This study aimed to characterize 3-dimensional-speckle tracking echocardiography-derived left and right ventricular myocardial mechanics in light chain amyloidosis and examine their relationship with brain natriuretic peptide. METHODS In patients with light chain amyloidosis, left ventricular longitudinal and circumferential strain (n=40), and right ventricular longitudinal strain and radial displacement (n=26) were obtained by 3-dimensional-speckle tracking echocardiography. Brain natriuretic peptide levels were determined. RESULTS All myocardial mechanics measurements showed differences when compared by brain natriuretic peptide level tertiles. Left and right ventricular longitudinal strain were highly correlated (r=0.95, P<.001). Left ventricular longitudinal and circumferential strain were reduced in patients with cardiac involvement (-9±4 vs -16±2; P<.001, and -24±6 vs -29±4; P=.01, respectively), with the most prominent impairment at the basal segments. Right ventricular longitudinal strain and radial displacement were diminished in patients with cardiac involvement (-9±3 vs -17±3; P<.001, and 2.7±0.8 vs 3.8±0.3; P=.002). On multivariate analysis, left ventricular longitudinal strain was associated with the presence of cardiac involvement (odds ratio = 1.6; 95% confidence interval, 1.04 to 2.37; P=.03) independent of the presence of brain natriuretic peptide and troponin I criteria for cardiac amyloidosis. CONCLUSIONS Three-dimensional-speckle tracking echocardiography-derived left and right ventricular myocardial mechanics are increasingly altered as brain natriuretic peptide increases in light chain amyloidosis. There appears to be a strong association between left ventricular longitudinal strain and cardiac involvement, beyond biomarkers such as brain natriuretic peptide and troponin I.
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Affiliation(s)
- Jose Angel Urbano-Moral
- Cardiovascular Imaging and Hemodynamic Laboratory, Tufts Medical Center, Boston Massachusetts, United States.
| | - Dakshin Gangadharamurthy
- Cardiovascular Imaging and Hemodynamic Laboratory, Tufts Medical Center, Boston Massachusetts, United States
| | - Raymond L Comenzo
- Cardiovascular Imaging and Hemodynamic Laboratory, Tufts Medical Center, Boston Massachusetts, United States
| | - Natesa G Pandian
- Cardiovascular Imaging and Hemodynamic Laboratory, Tufts Medical Center, Boston Massachusetts, United States
| | - Ayan R Patel
- Cardiovascular Imaging and Hemodynamic Laboratory, Tufts Medical Center, Boston Massachusetts, United States
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Hioki A, Masuda K, Asanuma T, Goto Y, Nakatani S. Application of three-dimensional speckle tracking echocardiography to assess left ventricular regional work using wall tension-regional area loop. Am J Physiol Heart Circ Physiol 2015; 308:H1258-64. [DOI: 10.1152/ajpheart.00932.2014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Accepted: 03/12/2015] [Indexed: 11/22/2022]
Abstract
Three-dimensional (3-D) speckle tracking echocardiography allows us to track a change in regional endocardial surface area. The change of regional area during a cardiac cycle should be useful for assessing left ventricular regional work. We investigated the feasibility of assessing regional work, calculated as the area within the wall tension-regional area (T-A) loop using 3-D echocardiography. Three-dimensional full-volume images were acquired using 3-D echocardiography (Artida, Toshiba) at baseline and during brief occlusion of the left circumflex coronary artery in eight dogs. Wall tension was calculated according to Laplace's law for a spherical model. Area change ratio (in %) determined by area tracking was transformed into a change of regional area (in cm2) by a custom software. We calculated the area within the T-A loop (TAA) in the area under transient ischemia (risk area) and the remote area as regional work and validated the T-A loop method by comparing the global integral of TAA with the total work assessed by the pressure-volume loop. During coronary occlusion, regional work for the risk area significantly decreased (baseline vs. occlusion, 26.8 ± 10.7 vs. 18.4 ± 7.8 mmHg·cm3; P < 0.05), whereas that for the remote area did not change. The global integral of TAA closely correlated with the total work assessed by the pressure-volume loop ( r = 0.91, P < 0.0001). The wall T-A loop reflected regional dysfunction caused by myocardial ischemia. This analysis using 3-D speckle tracking echocardiography might be useful to quantify left ventricular regional work.
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Affiliation(s)
- Ayana Hioki
- Division of Functional Diagnostics, Department of Health Sciences, Osaka University Graduate School of Medicine, Suita, Osaka, Japan; and
| | - Kasumi Masuda
- Division of Functional Diagnostics, Department of Health Sciences, Osaka University Graduate School of Medicine, Suita, Osaka, Japan; and
| | - Toshihiko Asanuma
- Division of Functional Diagnostics, Department of Health Sciences, Osaka University Graduate School of Medicine, Suita, Osaka, Japan; and
| | - Yoichi Goto
- Cardiology Division of Medicine, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - Satoshi Nakatani
- Division of Functional Diagnostics, Department of Health Sciences, Osaka University Graduate School of Medicine, Suita, Osaka, Japan; and
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115
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Abstract
The differentiation between hypertrophic and restrictive cardiomyopathies is often challenging in the routine clinical setting. Advances in the field of multimodal imaging have improved the diagnostics of these diseases and understanding of the underlying pathophysiology. Each imaging method, such as echocardiography, cardiac magnetic resonance imaging (CMR), cardiac computed tomography (CT) and coronary angiography including cardiac catheterization for pressure measurements, is of significant value in clinical diagnostics and also regarding therapeutic approaches and prognostic implications. This review gives an overview of developments of the past few years, describes recent insights and puts these findings into a scientific context. Particularly CMR has added valuable information to current knowledge by its unique potential of contrast-enhanced tissue characterization. Another promising CMR tool, parametric mapping has appeared on the horizon and may further deepen our understanding of cardiac pathophysiology as well as offer new therapeutic options to patients.
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116
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In pursuit of the holy grail. JACC Cardiovasc Imaging 2015; 8:523-525. [PMID: 25937191 DOI: 10.1016/j.jcmg.2015.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Revised: 02/20/2015] [Accepted: 02/20/2015] [Indexed: 11/21/2022]
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117
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Putko BN, Yogasundaram H, Chow K, Pagano J, Khan A, Paterson DI, Thompson RB, Oudit GY. Normal left-atrial structure and function despite concentric left-ventricular remodelling in a cohort of patients with Anderson-Fabry disease. Eur Heart J Cardiovasc Imaging 2015; 16:1129-36. [PMID: 25750198 DOI: 10.1093/ehjci/jev057] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Accepted: 02/18/2015] [Indexed: 11/14/2022] Open
Abstract
AIMS Anderson-Fabry Disease (AFD) is an important cause of cardiomyopathy characterized by concentric left-ventricular hypertrophy (LVH). We evaluated the extent of left-atrial (LA) structural and functional remodelling in this group of patients given that LA remodelling is a marker of adverse outcomes in the presence of LVH. METHODS AND RESULTS Clinical profiles were obtained and cardiac MRI was performed in cohorts of patients with AFD (n = 31), healthy controls (n = 23), and a positive control cohort with known concentric remodelling and LVH (CR/H, n = 21). Of patients with AFD, 58% were on enzyme-replacement therapy (ERT), 84% were on renin-angiotensin system antagonism, and 65% were on statins. Despite a similar increase in LV mass index in the AFD when compared with the CR/H cohort, mean LA volumes for the AFD group were similar to those seen in the healthy control group. Following from this, we observed that the percentage contribution to LV stroke volume due to elastic/passive and active LA emptying was similar in the AFD and healthy control groups, while passive emptying was significantly lower in the CR/H group. The consequences of LVH in the AFD cohort were manifested in atrioventricular uncoupling, whereby the extent of elastic/passive and active LA emptying was not a function of the extent of longitudinal movement of the mitral annular plane, as it was in healthy control subjects. CONCLUSION Left-atrial structure and function were relatively normal in our cohort of patients with AFD, who were also judiciously treated with a contemporary strategy that includes renin-angiotensin system antagonism, statins, and ERT.
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Affiliation(s)
- Brendan N Putko
- Division of Cardiology, Department of Medicine, Mazankowski Alberta Heart Institute, University of Alberta, 2C2 Walter Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
| | - Haran Yogasundaram
- Division of Cardiology, Department of Medicine, Mazankowski Alberta Heart Institute, University of Alberta, 2C2 Walter Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
| | - Kelvin Chow
- Department of Biomedical Engineering, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Joseph Pagano
- Department of Biomedical Engineering, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Aneal Khan
- Department of Medical Genetics and Pediatrics, University of Calgary, Calgary, Alberta, Canada
| | - D Ian Paterson
- Division of Cardiology, Department of Medicine, Mazankowski Alberta Heart Institute, University of Alberta, 2C2 Walter Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
| | - Richard B Thompson
- Department of Biomedical Engineering, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Gavin Y Oudit
- Division of Cardiology, Department of Medicine, Mazankowski Alberta Heart Institute, University of Alberta, 2C2 Walter Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
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118
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Pandian NG, Rowin EJ, Gonzalez AMG, Maron MS. Echocardiographic profiles in hypertrophic cardiomyopathy: imaging beyond the septum and systolic anterior motion. Echo Res Pract 2015; 2:E1-7. [PMID: 26693314 PMCID: PMC4676468 DOI: 10.1530/erp-15-0009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Accepted: 02/25/2015] [Indexed: 11/08/2022] Open
Affiliation(s)
- Natesa G Pandian
- The CardioVascular Center, Tufts Medical Center , 800 Washington Street, Boston, Massachusetts , USA
| | - Ethan J Rowin
- The CardioVascular Center, Tufts Medical Center , 800 Washington Street, Boston, Massachusetts , USA
| | | | - Martin S Maron
- The CardioVascular Center, Tufts Medical Center , 800 Washington Street, Boston, Massachusetts , USA
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119
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Szauder I, Kovács A, Pavlik G. Comparison of left ventricular mechanics in runners versus bodybuilders using speckle tracking echocardiography. Cardiovasc Ultrasound 2015; 13:7. [PMID: 25890373 PMCID: PMC4340118 DOI: 10.1186/s12947-015-0002-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Accepted: 02/10/2015] [Indexed: 01/20/2023] Open
Abstract
Background Athlete’s heart is a common definition for a broad spectrum of adaptations induced by intense exercise. We intended to compare left ventricular (LV) mechanics in two sports disciplines with different exercise nature: marathon runners (endurance) and bodybuilders (power). Methods 24 marathon or ultramarathon runners (R), 14 bodybuilders (B) and 15 healthy, sedentary male volunteers (N) were investigated. Beyond standard echocardiographic protocol, parasternal short-axis and apical recordings optimized for speckle tracking analysis were acquired (Esaote MyLab 25). Using dedicated software (TomTec 2D Performance Analysis), global longitudinal (GLS), circumferential (GCS) and radial strain (GRS) were calculated by averaging the corresponding 16 LV segments. Data are presented as mean ± SD. Results Calculated LV mass was higher in bodybuilders compared to normal controls (R vs. B vs. N: 198 ± 52 vs. 224 ± 69 vs. 186 ± 30 g, p < 0.05). We found no difference regarding conventional systolic function parameters among the groups (ejection fraction: 55 ± 9 vs. 60 ± 6 vs. 59 ± 5%; mitral lateral S’ velocity: 10.7 ± 0.6 vs. 10.6 ± 0.4 vs. 11.0 ± 0.8 cm/s). However, speckle tracking analysis showed a different pattern of myocardial deformation in our groups: while GRS was similar, GLS was decreased in runners, GCS was decreased in bodybuilders compared to the other two groups (GLS: -19.4 ± 3.4 vs. -23.3 ± 2.1 vs. -24.1 ± 3.0; GCS: -26.6 ± 3.8 vs. -22.4 ± 4.3 vs. -26.4 ± 2.7%, p < 0.05). Significant correlations were found in runners between GLS and end-diastolic volume (r = 0.46; p < 0.05), and body surface area (r = 0.49; p < 0.05). In bodybuilders, GCS was closely related to LV mass (r = 0.61; p < 0.01) and systolic blood pressure (r = 0.42; p < 0.05). Conclusions While conventional morphological and functional echocardiographic parameters failed to distinguish between the athlete’s heart of the two different sport disciplines, deformation parameters showed a different pattern of LV mechanics in runners versus bodybuilders. Electronic supplementary material The online version of this article (doi:10.1186/s12947-015-0002-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Ipoly Szauder
- Cardiologic Diagnostic Centre, Szabó Ilonka Str. 31, H-1015, Budapest, Hungary.
| | - Attila Kovács
- Cardiovascular Imaging Research Group, Heart and Vascular Center, Semmelweis University, Budapest, Hungary.
| | - Gábor Pavlik
- University of Physical Education, Budapest, Hungary.
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120
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Opdahl A, Helle-Valle T, Skulstad H, Smiseth OA. Strain, Strain Rate, Torsion, and Twist: Echocardiographic Evaluation. Curr Cardiol Rep 2015; 17:568. [DOI: 10.1007/s11886-015-0568-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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121
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122
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The prognostic value of standardized reference values for speckle-tracking global longitudinal strain in hypertrophic cardiomyopathy. Int J Cardiovasc Imaging 2015; 31:557-65. [PMID: 25585646 DOI: 10.1007/s10554-015-0590-5] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Accepted: 01/09/2015] [Indexed: 10/24/2022]
Abstract
Speckle-tracking left ventricular global longitudinal strain (GLS) assessment may provide substantial prognostic information for hypertrophic cardiomyopathy (HCM) patients. Reference values for GLS have been recently published. We aimed to evaluate the prognostic value of standardized reference values for GLS in HCM patients. An analysis of HCM clinic patients who underwent GLS was performed. GLS was defined as normal (more negative or equal to -16%) and abnormal (less negative than -16%) based on recently published reference values. Patients were followed for a composite of events including heart failure hospitalization, sustained ventricular arrhythmia, and all-cause death. The power of GLS to predict outcomes was assessed relative to traditional clinical and echocardiographic variables present in HCM. 79 HCM patients were followed for a median of 22 months (interquartile range 9-30 months) after imaging. During follow-up, 15 patients (19%) met the primary outcome. Abnormal GLS was the only echocardiographic variable independently predictive of the primary outcome [multivariate Hazard ratio 5.05 (95% confidence interval 1.09-23.4, p = 0.038)]. When combined with traditional clinical variables, abnormal GLS remained independently predictive of the primary outcome [multivariate Hazard ratio 5.31 (95 % confidence interval 1.18-24, p = 0.030)]. In a model including the strongest clinical and echocardiographic predictors of the primary outcome, abnormal GLS demonstrated significant incremental benefit for risk stratification [net reclassification improvement 0.75 (95 % confidence interval 0.21-1.23, p < 0.0001)]. Abnormal GLS is an independent predictor of adverse outcomes in HCM patients. Standardized use of GLS may provide significant incremental value over traditional variables for risk stratification.
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123
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Cho JS, Cho EJ, Lee J, Choi HD, Park KC, Lee KH, Yang KJ, Park MW, Park GM, Her SH, Kim CJ. Myocardial mechanics in a rat model with banding and debanding of the ascending aorta. J Cardiovasc Ultrasound 2014; 22:189-95. [PMID: 25580193 PMCID: PMC4286640 DOI: 10.4250/jcu.2014.22.4.189] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Revised: 12/08/2014] [Accepted: 12/08/2014] [Indexed: 01/29/2023] Open
Abstract
BACKGROUND Aortic banding and debanding models have provided useful information on the development and regression of left ventricular hypertrophy (LVH). In this animal study, we aimed to evaluate left ventricular (LV) deformation related to the development and regression of LVH. METHODS Minimally invasive ascending aorta banding was performed in rats (10 Sprague Dawley rats, 7 weeks). Ten rats underwent a sham operation. Thirty-five days later, the band was removed. Echocardiographic and histopathologic analysis was assessed at pre-banding, 35 days of banding and 14 days of debanding. RESULTS Banding of the ascending aorta created an expected increase in the aortic velocity and gradient, which normalized with the debanding procedure. Pressure overload resulted in a robust hypertrophic response as assessed by gross and microscopic histology, transthoracic echocardiography [heart weight/tibia length (g/m); 21.0 ± 0.8 vs. 33.2 ± 2.0 vs. 26.6 ± 2.8, p < 0.001]. The circumferential (CS) and radial strains were not different between the groups. However, there were significant differences in the degree of fibrosis according to the banding status (fibrosis; 0.10 ± 0.20% vs. 5.26 ± 3.12% vs. 4.03 ± 3.93%, p = 0.003), and global CS showed a significant correlation with the degree of myocardial fibrosis in this animal model (r = 0.688, p = 0.028). CONCLUSION In this animal study, simulating a severe LV pressure overload state, a significant increase in the LV mass index did not result in a significant reduction in the LV mechanical parameters. The degree of LV fibrosis, which developed with pressure overload, was significantly related to the magnitude of left ventricular mechanics.
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Affiliation(s)
- Jung Sun Cho
- Division of Cardiology, Daejeon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Eun Joo Cho
- Division of Cardiology, St. Paul's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Jongho Lee
- Department of Thoracic and Cardiovascular Surgery, Daejeon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Hyun-Duck Choi
- The University of Debrecen Medical and Health Science Center, Debrecen, Hungary
| | - Ki Cheol Park
- Clinical Research Institute, Daejeon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Kyung-Hwa Lee
- Department of Pathology, Hwasun Hospital, Chonnam National University Medical School, Gwangju, Korea
| | - Keum-Jin Yang
- Clinical Research Institute, Daejeon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Mahn-Won Park
- Division of Cardiology, Daejeon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Gyung-Min Park
- Division of Cardiology, Daejeon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Sung-Ho Her
- Division of Cardiology, Daejeon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Chan Joon Kim
- Division of Cardiology, Daejeon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
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124
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Echocardiographic Deformation Imaging for the Assessment of Left Ventricular Function: Clinical Implications and Perspectives— Update 2014. CURRENT CARDIOVASCULAR IMAGING REPORTS 2014. [DOI: 10.1007/s12410-014-9297-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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125
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Morris DA, Blaschke D, Canaan-Kühl S, Krebs A, Knobloch G, Walter TC, Haverkamp W. Global cardiac alterations detected by speckle-tracking echocardiography in Fabry disease: left ventricular, right ventricular, and left atrial dysfunction are common and linked to worse symptomatic status. Int J Cardiovasc Imaging 2014; 31:301-13. [PMID: 25315709 DOI: 10.1007/s10554-014-0551-4] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2014] [Accepted: 10/07/2014] [Indexed: 01/29/2023]
Abstract
The aim of this study was to test the hypothesis that in patients with Fabry disease, 2D speckle-tracking echocardiography (2DSTE) could detect functional myocardial alterations such as left ventricular (LV), right ventricular (RV), and left atrial (LA) dysfunction, even when conventional cardiac measurements are normal. In addition, we hypothesized that these global cardiac alterations could be linked to worse symptomatic status in these patients. Fifty patients with Fabry disease and a control group of 118 healthy subjects of similar age and gender were included. The myocardial function and structural changes of the LV, RV, and LA were analyzed by 2DSTE and cardiac magnetic resonance imaging. Patients with Fabry disease had significantly lower functional myocardial values of the LV, RV, and LA than healthy subjects (LV, RV, and LA strain -18.1 ± 4.0, -21.4 ± 4.9, and 29.7 ± 9.9 % vs. -21.6 ± 2.2, -25.2 ± 4.0, and 44.8 ± 11.1 %, respectively, P < 0.001) and elevated rates of LV, RV, and LA myocardial dysfunction (24, 20, and 26 %, respectively), even when conventional cardiac measurements such as LVEF, TAPSE, and LAVI were normal. LV septal wall thickness ≥15 mm, RV free wall thickness ≥7 mm, and LV longitudinal dysfunction were the principal factors linked to reduced LV, RV, and LA strain, respectively. In addition, but to a lesser extent, LV and RV fibrosis were linked to reduced LV and RV strain. Patients with reduced LV, RV, and LA strain had worse functional class (dyspnea-NYHA classification) than those with normal cardiac function. In conclusion, in patients with Fabry disease, 2DSTE analyses detect LV, RV, and LA functional myocardial alterations, even when conventional cardiac measurements are normal. These functional myocardial alterations are common and significantly associated with worse symptomatic status in Fabry patients. Therefore, these findings provide important evidence to introduce global myocardial analyses using 2DSTE in the early detection of functional cardiac alterations in Fabry disease.
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Affiliation(s)
- Daniel A Morris
- Department of Cardiology, Charité University Hospital, Campus Virchow Klinikum, Augustenburger Platz 1, 13353, Berlin, Germany,
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Hinojar R, Moya Mur JL, Fernández-Golfín C, Zamorano JL. Clinical Implications from Three-dimensional Echocardiographic Analysis in Hypertrophic Cardiomyopathy. CURRENT CARDIOVASCULAR IMAGING REPORTS 2014. [DOI: 10.1007/s12410-014-9294-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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127
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Elliott PM, Anastasakis A, Borger MA, Borggrefe M, Cecchi F, Charron P, Hagege AA, Lafont A, Limongelli G, Mahrholdt H, McKenna WJ, Mogensen J, Nihoyannopoulos P, Nistri S, Pieper PG, Pieske B, Rapezzi C, Rutten FH, Tillmanns C, Watkins H. 2014 ESC Guidelines on diagnosis and management of hypertrophic cardiomyopathy: the Task Force for the Diagnosis and Management of Hypertrophic Cardiomyopathy of the European Society of Cardiology (ESC). Eur Heart J 2014; 35:2733-79. [PMID: 25173338 DOI: 10.1093/eurheartj/ehu284] [Citation(s) in RCA: 2875] [Impact Index Per Article: 287.5] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
MESH Headings
- Ablation Techniques/methods
- Adult
- Angina Pectoris/etiology
- Arrhythmias, Cardiac/etiology
- Cardiac Imaging Techniques/methods
- Cardiac Pacing, Artificial/methods
- Cardiomyopathy, Hypertrophic/diagnosis
- Cardiomyopathy, Hypertrophic/etiology
- Cardiomyopathy, Hypertrophic/therapy
- Child
- Clinical Laboratory Techniques/methods
- Death, Sudden, Cardiac/prevention & control
- Delivery of Health Care
- Diagnosis, Differential
- Electrocardiography/methods
- Female
- Genetic Counseling/methods
- Genetic Testing/methods
- Heart Failure/etiology
- Heart Valve Diseases/diagnosis
- Heart Valve Diseases/therapy
- Humans
- Medical History Taking/methods
- Pedigree
- Physical Examination/methods
- Preconception Care/methods
- Pregnancy
- Pregnancy Complications, Cardiovascular/diagnosis
- Pregnancy Complications, Cardiovascular/therapy
- Prenatal Care/methods
- Risk Factors
- Sports Medicine
- Syncope/etiology
- Thoracic Surgical Procedures/methods
- Ventricular Outflow Obstruction/etiology
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128
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Levy-Favatier F, Leroux A, Antoine B, Nedelec B, Delpech M. Upregulation of rat P23 (a member of the YjgF protein family) by fasting, glucose diet and fatty acid feeding. Cell Mol Life Sci 2005; 61:2886-92. [PMID: 15558217 DOI: 10.1007/s00018-004-4231-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
In a previous study, we identified and purified a 99-amino-acid rat liver-kidney perchloric-acid-soluble 23-kDa protein (P23) which displays 30% identity with a highly conserved domain of heat shock proteins (HSPs), as well as an AT-rich 3' untranslated region, which has also been described to play a role in H70 mRNA life span and protein expression. An identical perchloric-acid-soluble protein inhibiting protein synthesis in a rabbit reticulocyte lysate system was also found 2 years later by another group. More recently, the novel, the YjgF, protein family has been described, comprising, 24 full-length homologues, including P23, highly conserved through evolution, and consisting of approximately 130 residues each and sharing a common ternary structure. Independent studies from different laboratories have provided various hypothetical functions for each of these proteins. The high degree of evolutionary conservation may suggest that these proteins play an important role in cellular regulation. Although the function of none of these proteins is known precisely, we present experimental evidence which, combined with the relationship to glucose-regulating protein revealed here, and the relationship to fatty-acid-binding protein revealed by others, allow us to propose a role for P23. In rat liver, P23 expression is developmentally regulated and modulated by dietary glucose, and its mRNA is induced by starvation, in the presence of fatty-acids and in 3-MeDAB-induced hepatomas. The mRNA encoding mouse liver P23 is also hormonally modulated in a mouse line AT1F8. These data indicate that P23 protein might be a key controller of intermediary metabolism during fasting.
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Affiliation(s)
- F Levy-Favatier
- Laboratoire de Physiologie Respiratoire, UFR Cochin, 24 rue du Fbg St Jacques, 75014, Paris, France.
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