• flaps
  • a polymeric outer membrane coated over the fiber membrane, the polymeric outer membrane and fiber membrane combining to form the tubular membrane structure, the tubular membrane structure terminating with a plurality of, supple valve flaps, each supple valve flap having a distally oriented leading edge defined along the circumference of the tubular membrane structure by adjacent connecting members, wherein the leading edge of the supple valve flap is frameless. (google.com)
  • The mitral valve is named after the mitre of a bishop, which resembles its flaps. (wikipedia.org)
  • inflow
  • 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)
  • Cardiac development is heavily regulated and requires the development of the four cardiac chambers, septum, and various valve components for outflow and inflow. (wikipedia.org)
  • papillary
  • The chordae tendineae are tendons made up mostly of collagen that link the papillary muscles to the tricuspid valve in the right ventricle and the mitral valve in the left ventricle. (aapc.com)
  • As the papillary muscles contract and relax, the chordae tendineae (sometimes called the heart strings) transmit the resulting increase and decrease in tension to the respective valves, causing them to open and close. (aapc.com)
  • The chordae tendineae are attached to papillary muscles that cause tension to better hold the valve. (wikipedia.org)
  • The chordae tendineae are inelastic tendons attached at one end to papillary muscles in the left ventricle, and at the other to the valve cusps. (wikipedia.org)
  • In these cases the left ventricle of the heart becomes enlarged and causes displacement of the attached papillary muscles, which control the mitral valve. (wikipedia.org)
  • Pressure Gradient
  • citation needed] When the mitral valve area goes below 2 cm2, the valve causes an impediment to the flow of blood into the left ventricle, creating a pressure gradient across the mitral valve. (wikipedia.org)
  • The subvalvular apparatus has no effect on the opening and closure of the valves, however, which is caused entirely by the pressure gradient across the valve. (wikipedia.org)
  • This early filling phase is due to active relaxation of the ventricular myocardium, causing a pressure gradient that allows a rapid flow of blood from the left atrium, across the mitral valve. (wikipedia.org)
  • This antegrade flow through the mitral valve before it completely closes appears to be the result of a pressure gradient at the end of diastole. (wikipedia.org)
  • The sounds often are caused by a reduced pressure gradient in the mitral area that was caused from decompression of the left atrium from the ASD and a displacement (moving from normal position) of the left ventricular lower portion of the heart to the a large right ventricle. (wikipedia.org)
  • semilunar valves
  • 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)
  • The closure of the semilunar valves causes the second heart sound. (wikipedia.org)
  • calcification
  • birth defects calcification diabetes iatrogenic, e.g. secondary to radiation therapy infection inflammation ischemia neoplasm - in such cases, the stenosis is often said to be "malignant" or "benign", although this attribute actually refers to the neoplasm itself. (wikipedia.org)
  • abnormal
  • A stenosis is an abnormal narrowing in a blood vessel or other tubular organ or structure. (wikipedia.org)
  • Murmurs may also be the result of various problems, such as narrowing or leaking of valves, or the presence of abnormal passages through which blood flows in or near the heart. (wikipedia.org)
  • posterior
  • The anterior cusp covers approximately two-thirds of the valve (imagine a crescent moon within the circle, where the crescent represents the posterior cusp). (wikipedia.org)
  • disease
  • A 64-year-old female with a history of ventilator dependent respiratory failure secondary to end-stage chronic obstructive pulmonary disease (COPD) and bioprosthetic mitral valve replacement 8 years ago was admitted to the medical intensive care unit (MICU) for worsening respiratory failure from pulmonary edema and multifocal pneumonia secondary to Escherichia coli . (hindawi.com)
  • This can be seen in patients with chronic heart failure, mitral valve disease and in chronic obstructive lung disease. (radiologyassistant.nl)
  • DESIGN: Forty patients with pure mitral valve disease were randomly divided into 2 groups. (biomedsearch.com)
  • In 2013, the European Association for Cardio-Thoracic Surgery (EACTS) and the European Society of Cardiology (ESC) published guidelines according to the therapy in heart valve disease. (uzh.ch)
  • Lutembacher syndrome is a rare disease that affects one of the chambers of the heart as well as a valve of the heart. (wikipedia.org)
  • Irrespective of disease process, alterations to the valve occur that produce one or a combination of these conditions. (wikipedia.org)
  • Aortic and mitral valve disease are termed left heart diseases. (wikipedia.org)
  • Pulmonary valve diseases are the least common heart valve disease in adults. (wikipedia.org)
  • murmurs
  • 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)
  • tissue
  • Echocardiography may show such abnormalities as poorly functioning heart valves or damage to the heart tissue from a past heart attack . (thefreedictionary.com)
  • There are several types of surgeries depending on the cause of Lutembacher's syndrome(ASD Primium or ASD Ostium Secundum with Mitral Stenosis): Suturing (stitching) or placing a patch of tissue (similar to skin grafting) over the hole to completely close the opening Reconstructing of the mitral and tricuspid valve while patching any holes in the heart Device closure of ASD (e.g. (wikipedia.org)
  • Details on mechanical heart valves and tissue valves. (dmoztools.net)
  • 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)
  • leaflet
  • 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)
  • 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)
  • 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)
  • Leaking valves can be corrected by mitral valve annuloplasty, a common surgical procedure that aims at restoring proper leaflet adjustment. (wikipedia.org)