• diastolic
  • This amount of blood is known as the end diastolic volume (EDV), and the mitral valve closes at the end of atrial contraction to prevent a reversal of blood flow. (wikipedia.org)
  • backflow
  • 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)
  • orifice
  • If the communicating orifice is small, the patient is critically ill and may succumb at a young age (usually during infancy) to congestive heart failure and pulmonary edema. (wikipedia.org)
  • surgical
  • Although surgical replacement of the PV is efficacious, artificial valves inevitably fail and require re-intervention. (stanford.edu)
  • The FinnValve investigators planned a nationwide registry to investigate the early and late outcome of transcatheter aortic valve implantation (TAVI) compared to surgical aortic valve repl. (bioportfolio.com)
  • Treatment of damaged valves may involve medication alone, but often involves surgical valve repair (valvuloplasty) or replacement (insertion of an artificial heart valve). (wikipedia.org)
  • In the past two decades, some surgeons have embraced surgical techniques to repair the damaged native valve, rather than replace it. (wikipedia.org)
  • The traditional surgical approach to a mitral valve repair is a full or partial sternotomy, in which the surgeon cuts through the breastbone at the center of the chest to access the heart. (wikipedia.org)
  • heart valves
  • The heart valves and the chambers are lined with endocardium. (wikipedia.org)
  • Heart valves separate the atria from the ventricles, or the ventricles from a blood vessel. (wikipedia.org)
  • Heart valves are situated around the fibrous rings of the cardiac skeleton. (wikipedia.org)
  • Heart murmurs are heart sounds produced when blood flows across one of the heart valves that are loud enough to be heard with a stethoscope. (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)
  • tissue
  • The Edwards SAPIEN™ THV is a biological heart valve manufactured with treated bovine pericardial tissue that is mounted into a balloon expandable stainless steel open cell stent. (clinicaltrials.gov)
  • Epicardial Adipose Tissue Thickness Independently Predicts Severe Aortic Valve Stenosis. (bioportfolio.com)
  • Finally, artificial tissue valves will wear out - on average lasting between 10 and 15 years, requiring further surgery at an advanced age. (wikipedia.org)
  • It is flexible and shock absorbent, essential qualities for a tissue heart valve support. (wikipedia.org)
  • implantation
  • Determining viability of fresh or cryopreserved homograft valves at implantation. (biomedsearch.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)
  • ejection
  • Inhalation leads to an increase in intrathoracic negative pressure, which increases the capacity of pulmonary circulation, thereby prolonging ejection time. (wikipedia.org)
  • bioprosthetic heart valve
  • Also disclosed is a method of making a bioprosthetic heart valve using biological material that has been treated by controlled autolysis and a method of treating a mammal having a defective heart valve using a bioprosthetic heart valve made, in part, by controlled autolysis. (google.com)
  • 2. The bioprosthetic heart valve of claim 1, wherein the bioprosthetic valve additionally comprises a generally tubular stent having an inflow end and an outflow end, and wherein the at least one leaflet is positioned in relation to the stent such that the reciprocal motion of the at least one leaflet occurs as blood flows from the inflow end of the stent through the outflow end of the stent. (google.com)
  • 3. The bioprosthetic heart valve of claim 2, wherein the stent has a generally circular cross-section. (google.com)
  • 4. The bioprosthetic heart valve of claim 2, wherein the stent has an inner surface and an outer surface and wherein the at least one leaflet is attached to the inner surface. (google.com)
  • 5. The bioprosthetic heart valve of claim 2, wherein the stent comprises non-biological material. (google.com)
  • 6. The bioprosthetic heart valve of claim 1, wherein the at least one region of the biological material that is rendered substantially acellular is substantially all of the leaflet. (google.com)
  • 7. The bioprosthetic heart valve of claim 1, wherein the biological material is porcine. (google.com)
  • 8. The bioprosthetic heart valve of claim 7, wherein the biological material is a leaflet of a heart valve or a fragment of a leaflet of a heart valve. (google.com)
  • 10. The bioprosthetic heart valve of claim 1, wherein the controlled autolysis additionally comprises the step of fixing the biological material after the exposing step. (google.com)
  • 11. The bioprosthetic heart valve of claim 1, wherein the biological material is derived from at least one animal selected from the group consisting of a bovine, a porcine, an ovine, a Macropodidae, a non-human primate, a human and a combination of any of the foregoing. (google.com)
  • 13. The bioprosthetic heart valve of claim 1, wherein the non-cellular structural components include at least one structural component selected from the group consisting of collagen, elastin, laminin, teninsin, actinin, proteoglycans, a fragment of any of the foregoing, and a combination of any of the foregoing. (google.com)
  • He created this artificial bioprosthetic heart valve as a three-cusp structure made of chemically treated bovine pericardium attached to a Dacron cloth-covered titanium frame. (wikipedia.org)