• tissue
  • In one embodiment, a method for attaching a valve prosthesis to a target tissue includes providing a ring having a portion defining a groove and a plurality of fasteners coupled to the ring. (google.com)
  • 17 . The device of claim 1 further comprising a mesh or a polymer membrane coupled to said fasteners to minimize fluid leakage between the valve prosthesis and the target tissue once the valve prosthesis is delivered. (google.com)
  • Anatomically, the valves are part of the dense connective tissue of the heart known as the cardiac skeleton and are responsible for the regulation of blood flow through the heart and great vessels. (wikipedia.org)
  • In some cases vegetations form on the mitral leaflets as a result of endocarditis, an inflammation of the heart tissue. (wikipedia.org)
  • It is flexible and shock absorbent, essential qualities for a tissue heart valve support. (wikipedia.org)
  • One should however keep in mind that any single investigator should resist the temptation to write a review of such a complex matter as tissue heart valves, and to cover the subject completely and fairly. (wikipedia.org)
  • dysfunction
  • Such an increase in stress may eventually result in a dilatory process that further exacerbates valve dysfunction and degrades cardiac efficiency. (google.es)
  • Valve failure or dysfunction can result in diminished heart functionality, though the particular consequences are dependent on the type and severity of valvular disease. (wikipedia.org)
  • closure
  • The closure of the AV valves is heard as lub, the first heart sound (S1). (wikipedia.org)
  • The closure of the SL valves is heard as dub, the second heart sound (S2). (wikipedia.org)
  • The closure of the semilunar valves causes the second heart sound. (wikipedia.org)
  • The closure of the aortic valve contributes the A2 component of the second heart sound. (wikipedia.org)
  • The entire Delrin structure was covered with seamless Dacron velour and at a later stage, the margins of the scalloped edges were covered with a thin layer of pericardium in an attempt to prevent or reduce the abrasion of the leaflets when in contact with this margin during valve closure. (wikipedia.org)
  • particular valve
  • The thickness and pliability of the pericardium were standardized and the direction of macroscopically visible fibres matched for each three cusps of a particular valve. (wikipedia.org)
  • insertion
  • The peculiar insertion of chords on the leaflet free margin, however, provides systolic stress sharing between chords according to their different thickness. (wikipedia.org)
  • More appreciable insufficiency it is typically the result of damage to the valve due to cardiac catheterization, aortic balloon pump insertion, or other surgical manipulations. (wikipedia.org)
  • artificial
  • The results showed that this original valve exhibited the best haemodynamic performance, at rest and during exercise, when compared with the reported results of all other artificial valves in existence. (wikipedia.org)
  • method
  • A valve delivery device and method of use is provided. (google.com)
  • 12 . A method of visualization of the position of a valve comprising visualizing the position of the valve of claim 1 during implantation using fluoroscopy. (google.es)
  • Patients
  • Throughout these five years of usage in 212 patients the performance of the pericardial valve was thoroughly evaluated. (wikipedia.org)
  • Approximately 200,000 pericardial valves manufactured by Shiley Laboratories were distributed around the world between 1976 and 1987 and it is presumed that most of them were implanted in patients. (wikipedia.org)
  • prevents
  • Two other additions were made: an integral valve holder which prevents the touching of the valve's cusps, and a 'freeze-watch' indicator as a safe-guard against exposing the valves during transportation or storage at temperatures below 4 degrees Celsius. (wikipedia.org)
  • device
  • The experimental and in vitro testing of this novel device took place in 1970, and in March 1971, Ionescu began, for the first time, the implantation of the pericardial valve in all three cardiac positions in humans.Between 1971 and 1976 the valves had been made in Ionescu's own hospital laboratory. (wikipedia.org)
  • normal
  • In such cases, the valve components may be normal pathologically, yet may be unable to function properly due to changes in the surrounding environment. (google.es)
  • Mitral insufficiency is significantly associated with normal aging, rising in prevalence with age. (wikipedia.org)
  • shape
  • The geometry of the valve was slightly modified due to changes in the shape of the stent and by removing the outside plegets around the posts. (wikipedia.org)
  • implantable
  • An implantable prosthetic valve having a stentless support structure. (google.es)
  • 24 . A prosthetic chamber made from implantable materials, including a one way valve, an outlet conduit and more than one inlet conduit and the inlet conduits are designed to attach to the pulmonary veins. (google.es)
  • close
  • Despite all these difficulties and impediments, a general view of the performance of the pericardial valve as close to reality as possible could be obtained. (wikipedia.org)