Search Results - "Ingels, N B"

Deformational dynamics of the aortic root : Modes and physiologic determinants by DAGUM, P, GREEN, G. R, NISTAL, F. J, DAUGHTERS, G. T, TIMEK, T. A, FOPPIANO, L. E, BOLGER, A. F, INGELS, N. B, MILLER, D. C

“…Current surgical methods for treating aortic valve and aortic root pathology vary widely, and the basis for selecting one repair or replacement alternative…”
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Transmural strains in the ovine left ventricular lateral wall during diastolic filling by Kindberg, K, Carlhäll, C, Karlsson, M, Nguyen, T C, Cheng, A, Langer, F, Rodriguez, F, Daughters, G T, Miller, D C, Ingels, Jr, N B

“…Rapid early diastolic left ventricular (LV) filling requires a highly compliant chamber immediately after systole, allowing inflow at low driving pressures…”
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Nonhomogeneous strain from sparse marker arrays for analysis of transmural myocardial mechanics by Kindberg, K, Karlsson, M, Ingels, Jr, N B, Criscione, J C

“…Knowledge of normal cardiac kinematics is important when attempting to understand the mechanisms that impair the contractile function of the heart during…”
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Contribution of mitral annular dynamics to LV diastolic filling with alteration in preload and inotropic state by Carlhäll, C, Kindberg, K, Wigström, L, Daughters, G T, Miller, D C, Karlsson, M, Ingels, Jr, N B

“…Mitral annular (MA) excursion during diastole encompasses a volume that is part of total left ventricular (LV) filling volume (LVFV). Altered excursion or area…”
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Restricted posterior leaflet motion after mitral ring annuloplasty by Green, G.Randall, Dagum, Paul, Glasson, Julie R, Nistal, J.Francisco, Daughters, George T, Ingels, Neil B, Miller, D.Craig

“…Background. The effects of ring annuloplasty on mitral leaflet motion are incompletely known. The three-dimensional dynamics of the mitral valve in vivo were…”
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Alumina as a Computed Tomography Soft Material and Tissue Fiducial Marker by Stephens, S. E., Ingels, N. B., Wenk, J. F., Jensen, M. O.

“…Background The use of 3D imaging is becoming increasingly common, so too is the use of fiducial markers to identify/track regions of interest and assess…”
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Alterations in left ventricular twist mechanics with inotropic stimulation and volume loading in human subjects by MOON, M. R, INGELS, N. B, DAUGHTERS, G. T, STINSON, E. B, HANSEN, D. E, MILLER, D. C

“…Left ventricular (LV) twist, the longitudinal gradient of circumferential rotation about the LV long axis, may play an important role in the storage of…”
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MicroCT Imaging of Heart Valve Tissue in Fluid by Stephens, S.E., Bean, M., Surber, H., Ingels, N.B., Jensen, H.K., Liachenko, S., Wenk, J.F., Jensen, M.O.

“…Background Heart valve computational models require high quality geometric input data, commonly obtained using micro-computed tomography. Whether in the open…”
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Relation Between Longitudinal, Circumferential, and Oblique Shortening and Torsional Deformation in the Left Ventricle of the Transplanted Human Heart by Ingels, Neil B, Hansen, David E, Daughters, George T, Stinson, Edward B, Alderman, Edwin L, Miller, D Craig

“…The present study was designed to investigate the anisotropy of systolic chord shortening in the lateral, inferior, septal, and anterior regions of the human…”
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Mitral annular size and shape in sheep with annuloplasty rings by Glasson, Julie R., Green, G.Randall, Nistal, J.Francisco, Dagum, Paul, Komeda, Masashi, Daughters, George T., Bolger, Ann F., Foppiano, Linda E., Ingels, Neil B., Miller, D.Craig

“…Background: Mitral annuloplasty is an important element of most mitral repairs, yet the effects of various types of annuloplasty rings on mitral annular…”
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Septal function during Left ventricular unloading by MOON, M. R, BOLGER, A. F, DEANDA, A, KOMEDA, M, DAUGHTERS, G. T, NIKOLIC, S. D, MILLER, D. C, INGELS, N. B

“…Left ventricular (LV) unloading with mechanical support devices alters biventricular geometry and impairs right ventricular (RV) contractility, but its effect…”
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Mitral annular dilatation and papillary muscle dislocation without mitral regurgitation in sheep by GREEN, G. R, DAGUM, P, GLASSON, J. R, DAUGHTERS, G. T, BOLGER, A. F, FOPPIANO, L. E, BERRY, G. J, INGELS, N. B, MILLER, D. C

“…Asymmetrical mitral annular (MA) dilatation and papillary muscle dislocation are implicated in the pathogenesis of functional mitral regurgitation (MR). To…”
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Edge-to-edge mitral repair: tension on the approximating suture and leaflet deformation during acute ischemic mitral regurgitation in the ovine heart by Nielsen, S L, Timek, T A, Lai, D T, Daughters, G T, Liang, D, Hasenkam, J M, Ingels, N B, Miller, D C

“…Edge-to-edge approximation of the mitral valve leaflets (Alfieri procedure) is a novel surgical treatment for patients with ischemic mitral regurgitation…”
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Ring annuloplasty prevents delayed leaflet coaptation and mitral regurgitation during acute left ventricular ischemia by Timek, Tomasz, Glasson, Julie R., Dagum, Paul, Green, G.Randall, Nistal, J.Francisco, Komeda, Masashi, Daughters, George T., Bolger, Ann F., Foppiano, Linda E., Ingels, Neil B., Miller, D.Craig

“…Objective: Incomplete mitral leaflet coaptation during acute left ventricular ischemia is associated with end-diastolic mitral annular dilatation and ischemic…”
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Alterations in left ventricular diastolic twist mechanics during acute human cardiac allograft rejection by YUN, K. L, NICZYPORUK, M. A, DAUGHTERS, G. T, INGELS, N. B, STINSON, E. B, ALDERMAN, E. L, HANSEN, D. E, MILLER, D. C

“…Contraction of obliquely oriented left ventricular (LV) fibers results in a twisting motion of the left ventricle. The purpose of this study was to assess the…”
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Experimental evaluation of different chordal preservation methods during mitral valve replacement by Moon, Marc R., DeAnda, Abe, Daughters, George T., Ingels, Neil B., Miller, D.Craig

“…During chordal-sparing mitral valve replacement (MVR), some recommend anatomic reattachment of the anterior leaflet chordae to the anterior annulus; others…”
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Pathogenesis of mitral regurgitation in tachycardia-induced cardiomyopathy by Timek, T A, Dagum, P, Lai, D T, Liang, D, Daughters, G T, Ingels, Jr, N B, Miller, D C

“…Dilated cardiomyopathy is often associated with mitral regurgitation (MR), or so-called functional MR, the mechanism of which continues to be debated. We…”
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Three-dimensional geometric comparison of partial and complete flexible mitral annuloplasty rings by Dagum, Paul, Timek, Tomasz, Green, G.Randall, Daughters, George T., Liang, David, Ingels, Neil B., Miller, D.Craig

“…Background: It has previously been shown in sheep that mitral annular physiologic dynamics during the cardiac cycle are abolished by complete ring…”
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Effect of volume loading, pressure loading, and inotropic stimulation on left ventricular torsion in humans by HANSEN, D. E, DAUGHTERS, G. T, ALDERMAN, E. L, INGELS, N. B, STINSON, E. B, MILLER, D. C

“…The transmural distribution of fiber angles and the extent of shortening among obliquely oriented fibers are likely to be major determinants of the twisting…”
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Torsional Deformation of the Left Ventricular Midwall in Human Hearts With Intramyocardial Markers: Regional Heterogeneity and Sensitivity to the Inotropic Effects of Abrupt Rate Changes by Hansen, David E, Daughters, George T, Alderman, Edwin L, Ingels, Neil B, Miller, D Craig

“…The spiral orientation of left ventricular (LV) fibers suggests that twisting about the ventricular long axis of the apex with respect to the base, i.e.,…”
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