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pro vyhledávání: ''
Autor:
Ludwig K. von Segesser, Denis Berdajs, Christof Gerber, Enrico Ferrari, Dominique Charbonnier, Selim Mosbahi, Zalan Forro
Publikováno v:
European Journal of Cardio-Thoracic Surgery. 49:1213-1221
OBJECTIVES The aim was to define the 3-dimensional (3D) geometrical changes of the aortic root and to determine the local shear stress profile of aortic root elements during the cardiac cycle. METHODS Six sonomicrometric crystals (200 Hz) were implan
Autor:
Narihiro Ishida, Eiji Murakami, Shinsuke Matsumoto, Hideaki Manabe, Katsuya Shimabukuro, Hirofumi Takemura, Hisashi Iwata
Publikováno v:
European Journal of Cardio-Thoracic Surgery. 39:375-380
Objective: We investigated whether omentopexy combined with subcutaneously administered granulocyte colony-stimulating factor (G-CSF) reduces infarction areas and improves left ventricular dysfunction in a rabbit model of coronary occlusion and reper
Autor:
Wolfgang Bothe, D C Miller, Neil B. Ingels, Akinobu Itoh, Margaret E. Roberts, Tom C. Nguyen, Tomasz A. Timek
Publikováno v:
European Journal of Cardio-Thoracic Surgery. 36:236-243
Background: The mitral annulus (MA) is a dynamic structure that joins the left atrium (LA) and left ventricle (LV), but it is unknown whether MA motion is coupled to the LA or the LV or neither of the two. Since a well orchestrated coordination of LA
Autor:
Lasse Lovstakken, Håvard Nordgaard, Idar Kirkeby-Garstad, Rune Haaverstad, Nicola Vitale, Dag Nordhaug
Publikováno v:
European Journal of Cardio-Thoracic Surgery. 36:137-142
To assess whether coronary graft flow patterns are affected differently by native coronary competitive flow or by stenosis of the coronary anastomosis.Nine pigs (65-70 kg) underwent off-pump grafting of the left internal mammary artery to the left an
Autor:
Rita G. Laurence, Lawrence S. Lee, Ramanan Umakanthan, Lawrence H. Cohn, Ravi K. Ghanta, John Fox, Ralph Morton Bolman, Frederick Y. Chen
Publikováno v:
European Journal of Cardio-Thoracic Surgery. 34:1136-1140
Objective: Current ventricular restraint devices do not allow for either the measurement or adjustment of ventricular restraint level. Periodic adjustment of restraint level post-device implantation may improve therapeutic efficacy. We evaluated the
Autor:
Frederick A. Tibayan, George T. Daughters, D C Miller, David Liang, Allen Cheng, Neil B. Ingels, Tom C. Nguyen
Publikováno v:
European Journal of Cardio-Thoracic Surgery. 31:423-429
Objective:Septal-lateralannularcinching(‘SLAC’)correctsbothacuteandchronicischemic mitralregurgitation inanimalexperiments,which has led to the development of therapeutic surgical and interventional strategies incorporating this concept (e.g., Ed
Sequential deformation and physiological considerations in unipolar right or left ventricular pacing
Autor:
George Trummer, Hideyuki Tomioka, Zhongtuo Tan, Oliver J. Liakopoulos, Gerald D. Buckberg, Nikola Hristov
Publikováno v:
European Journal of Cardio-Thoracic Surgery. 29:S188-S197
To determine the effects of ventricular pacing on the normal contraction sequence of the helical ventricular myocardial band, and its' impact on left ventricular function.Ten pigs (25-68 kg) underwent analysis of percent segmental shortening (%SS) by
Autor:
John P. Boineau
Publikováno v:
European Journal of Cardio-Thoracic Surgery. 29:S56-S60
Although the ventricular muscle band (VMB) is formed by one continuous band of myocardium and there is some evidence to suggest that it may contract sequentially along its course from the right ventricle, through the septum, then along its basoapical
Autor:
Julien I. E. Hoffman, Cecil Coghlan
Publikováno v:
European Journal of Cardio-Thoracic Surgery. 29:S4-S17
Summary This overview addresses the remarkable efficiency of the mammalian heart as a pump of unique capacity to quickly vary output and ejection velocity and its relation to ventricular geometry, fiber architecture, integrity of collagen scaffold an
Publikováno v:
European Journal of Cardio-Thoracic Surgery. 29:S107-S114
Objective: The systolic and diastolic effects of myocardial stunning were studied to evaluate the contributions of the endocardial and epicardial segments of the ventricular myocardial band, and determine if preconditioning by Na + —H + exchange (N