• annulus reshap
  • A mitral valve annulus reshaping device includes at least a portion that is formed of a biocompatible shape memory alloy SMA having a characteristic temperature, Af, that is preferably below body temperature. (google.es)
  • coronary sinus
  • There are also the coronary sinus and the inferior vena cava valves. (wikipedia.org)
  • When positioned in the coronary sinus, the elongate body is transferable to the second state assuming a reduced radius of curvature, whereby the radius of curvature of the coronary sinus and the radius of curvature as well as the circumference of the mitral annulus is reduced. (google.com)
  • 3 . The device of claim 1 , wherein the shape memory alloy is super-elastic, so that the shape memory alloy is adapted to produce a force directed against a mitral valve annulus from within a coronary sinus, as the shape memory alloy super-elastically changes from the deformed shape to the programmed shape. (google.es)
  • and (b) at least a portion of the device comprising a selectively configurable force applying component to apply a force directed against an interior surface of a coronary sinus, causing a modification of an annulus of a mitral valve within a body of a patient. (google.es)
  • 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)
  • The scaffold can be placed in an elastically loaded condition in a heart with the struts engaging tissue at or near the leaflet commissures of a heart valve annulus, to reshape the annulus for leaflet coaptation. (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)
  • prevent backflow
  • The valves incorporate leaflets or cusps, which are pushed open to allow blood flow and which then close together to seal and prevent backflow. (wikipedia.org)
  • These two arteries receive blood from the ventricles and their semilunar valves permit blood to be forced into the arteries, and prevent backflow from the arteries into the ventricles. (wikipedia.org)
  • endocarditis
  • Additionally, insufficiency may be the result of carcinoid syndrome, inflammatory processes such a rheumatoid disease or endocarditis, or congenital malformations. (wikipedia.org)
  • Cardiovascular collapse with shock (cardiogenic shock) may be seen in individuals with acute MI due to papillary muscle rupture, rupture of a chorda tendinea or infective endocarditis of the mitral valve. (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)
  • Rupture or dysfunction of the papillary muscle are also common causes in acute cases, dysfunction, which can include mitral valve prolapse. (wikipedia.org)
  • closure
  • Stenosis can also result in insufficiency if thickening of the annulus or leaflets results in inappropriate leaf closure. (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)
  • 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)
  • 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)
  • patients
  • Patients with mitral valve prolapse may have a holosystolic murmur or often a mid-to-late systolic click and a late systolic murmur. (wikipedia.org)
  • 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)
  • device
  • A valve delivery device and method of use is provided. (google.com)
  • 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)
  • method
  • 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)
  • 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)
  • 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)
  • least
  • Such devices include members configured to alter the shape of a valve annulus, reposition at least one papillary muscle, and/or plug an orifice of the valve so. (google.es)
  • 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)