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Delineation of Cardiac Twist by a Sonographically Based 2-Dimensional Strain Analysis Method

2006; Wiley; Volume: 25; Issue: 9 Linguagem: Inglês

10.7863/jum.2006.25.9.1193

1550-9613

Muhammad Ashraf, Xiao Kui Li, Monica T. Young, Amariek J. Jensen, James Pemberton, Ling Hui, Peter Lysyansky, Zvi Friedman, Byung Park, David J. Sahn,

Cardiovascular Function and Risk Factors

Journal of Ultrasound in MedicineVolume 25, Issue 9 p. 1193-1198 Technical Advance Delineation of Cardiac Twist by a Sonographically Based 2-Dimensional Strain Analysis Method An In Vitro Validation Study Muhammad Ashraf MD, Muhammad Ashraf MD Oregon Health and Science University, Portland, Oregon USASearch for more papers by this authorXiao Kui Li MD, Xiao Kui Li MD Oregon Health and Science University, Portland, Oregon USASearch for more papers by this authorMonica T. Young BS, Monica T. Young BS Oregon Health and Science University, Portland, Oregon USASearch for more papers by this authorAmariek J. Jensen BS, Amariek J. Jensen BS Oregon Health and Science University, Portland, Oregon USASearch for more papers by this authorJames Pemberton MBBS, MD, James Pemberton MBBS, MD Oregon Health and Science University, Portland, Oregon USASearch for more papers by this authorLing Hui MD, PhD, Ling Hui MD, PhD Oregon Health and Science University, Portland, Oregon USASearch for more papers by this authorPeter Lysyansky PhD, Peter Lysyansky PhD GE Healthcare, Haifa, IsraelSearch for more papers by this authorZvi Friedman, Zvi Friedman GE Healthcare, Haifa, IsraelSearch for more papers by this authorByung Park PhD, Byung Park PhD Oregon Health and Science University, Portland, Oregon USASearch for more papers by this authorDavid J. Sahn MD, Corresponding Author David J. Sahn MD [email protected] Oregon Health and Science University, Portland, Oregon USAAddress correspondence to David J. Sahn, MD, L608, Cardiac Fluid Dynamics and Imaging Laboratory, Oregon Health and Science University, 3181 SW Sam Jackson Park Rd, Portland, OR 97239-3098 USA.Search for more papers by this author Muhammad Ashraf MD, Muhammad Ashraf MD Oregon Health and Science University, Portland, Oregon USASearch for more papers by this authorXiao Kui Li MD, Xiao Kui Li MD Oregon Health and Science University, Portland, Oregon USASearch for more papers by this authorMonica T. Young BS, Monica T. Young BS Oregon Health and Science University, Portland, Oregon USASearch for more papers by this authorAmariek J. Jensen BS, Amariek J. Jensen BS Oregon Health and Science University, Portland, Oregon USASearch for more papers by this authorJames Pemberton MBBS, MD, James Pemberton MBBS, MD Oregon Health and Science University, Portland, Oregon USASearch for more papers by this authorLing Hui MD, PhD, Ling Hui MD, PhD Oregon Health and Science University, Portland, Oregon USASearch for more papers by this authorPeter Lysyansky PhD, Peter Lysyansky PhD GE Healthcare, Haifa, IsraelSearch for more papers by this authorZvi Friedman, Zvi Friedman GE Healthcare, Haifa, IsraelSearch for more papers by this authorByung Park PhD, Byung Park PhD Oregon Health and Science University, Portland, Oregon USASearch for more papers by this authorDavid J. Sahn MD, Corresponding Author David J. Sahn MD [email protected] Oregon Health and Science University, Portland, Oregon USAAddress correspondence to David J. Sahn, MD, L608, Cardiac Fluid Dynamics and Imaging Laboratory, Oregon Health and Science University, 3181 SW Sam Jackson Park Rd, Portland, OR 97239-3098 USA.Search for more papers by this author First published: 01 September 2006 https://doi.org/10.7863/jum.2006.25.9.1193Citations: 22Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Abstract Objective. Normal left ventricular contraction involves a twisting component that helps augment stroke volume, the unwinding of which also very usefully contributes to early diastolic filling. Abnormalities of cardiac twist have been related to abnormal cardiac function. We sought to quantify the twisting action using a new sonographically based angle-independent motion-detecting echo method. Methods. A twist model was developed with a variable-speed motor to rotate a wheel in water bath. A freshly harvested pig heart was mounted on it as a twist phantom. Short axis views were acquired with a GE/VingMed Vivid 7 system (GE Healthcare, Milwaukee, WI) at 3.5 MHz and more than 100 frames/s. Eight different speeds (30–100 cycles/min of winding and unwinding) were studied at 5 degrees of rotation (10°, 20°, 30°, 40°, and 50°). Data were analyzed off-line for twist analysis with a new 2-dimensional speckle-tracking–based program (2-dimensional strain rate method [2DSR]) embedded in EchoPac software (GE Healthcare). Ten freshly harvested pig hearts were studied in this model. Results. The 2DSR program tracked the twist well (mean determination at 10° = 16.88° ± 1.81° [SD]; at 20° = 26.5° ± 1.05°; at 30° = 36.47° ± 1.31°; at 40° = 44.03° ± 1.39°; and at 50° = 54.1° ± 1.96°). Conclusions. The 2DSR program can be used to study twisting action of the heart. References 1Torrent-Guasp F, Kocica MJ, Corno A, et al. Systolic ventricular filling. Eur J Cardiothorac Surg 2004; 25: 376–386. 2Buckberg GD. Basic science review: the helix and the heart. J Thorac Cardiovasc Surg 2002; 124: 863–883. 3Lunkenheimer PP, Redmann K, Anderson RH. The architecture of the ventricular mass and its functional implications for organ preserving surgery. Eur J Cardiothorac Surg 2005; 27: 183–190. 4Torrent-Guasp F, Buckberg GD, Clemente C, Cox JL, Coghlan HC, Gharib M. The structure and function of the helical heart and its buttress wrapping, I: the normal macroscopic structure of the heart. Semin Thorac Cardiovasc Surg 2001; 13: 301–319. 5Yun KL, Niczyporuk MA, Daughters GT II, et al. 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