Download Recent Progress in Mitral Valve Disease by Carlos Duran PDF

By Carlos Duran

ISBN-10: 0407002944

ISBN-13: 9780407002944

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Additional resources for Recent Progress in Mitral Valve Disease

Sample text

The results reported in this study indicate that an increase in length of five times the average length of the left ventricle does not cause the strength of the vortex to become negligible. The strength of the vortex in the long cylindrical shaped chamber of the isolated mitral valve studies, however, does appear to be less than the strength of the vortex in the left ventricular shaped mitral valve chamber Model II. No studies were conducted in this investigation on the effect of the diameter of the left ventricular chamber.

Shunt open: mean LAP = 8 mm Hg,fillingvolume = 26 ml. Shunt closed: mean LAP = 5 mm Hg,fillingvolume = 21ml. ) Results and discussion 53 peak flow (rapid early filling) and a 25% reduction in total filling volume. The other hemodynamic parameters which influence filling—left ventricular relaxation and diastolic filling time—were unchanged. Thus, physiologically small increments in filling pressure produce large changes in filling volume. 5 is another record from an anesthetized dog study 16 which illustrates the profound effect of left ventricular relaxation rate on early filling.

Flow patern photographs are not presented in the most recent publication, but sketches are drawn. Bellhouse described a 'ring vortex' in the model left ventricle. He observed that the incoming jet struck the apex of the ventricle and spread out to flow up the walls to the base of the ventricle and then turned back behind the leaflets toward the apex again to form a 'ring vortex'. The vortex in the model studies of Bellhouse was asymmetrical with the greatest strength concentrated in the outflow tract behind the anterior leaflet of the model mitral valve.

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Recent Progress in Mitral Valve Disease by Carlos Duran


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