• annulus
  • A device for treatment of mitral annulus dilatation comprises an elongate body having two states. (google.com)
  • 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)
  • wherein the proximal and distal end regions of the elongate body are configured to be anchored to opposing regions of tissue adjacent the mitral valve annulus and wherein the elongate body urges the opposing regions of tissue together when manipulated to the second configuration. (google.com)
  • 13. A medical apparatus for remodeling a mitral valve annulus, comprising an elongate body having a substantially fixed length, the elongate body being sized for insertion at least partially into a coronary sinus, wherein the elongate body is configured to change curvature after insertion into the coronary sinus for exerting a compressive force on the mitral valve annulus. (google.com)
  • 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)
  • The reshaping device is deployed adjacent to the mitral valve annulus of the heart as it is forced from the catheter. (google.es)
  • 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)
  • The fourth dysplastic cusp is incapable of fully closing the aortic annulus, which causes a backflow of blood through the aortic valve. (wikipedia.org)
  • This can lead to the subsequent displacement of the papillary muscles and the dilatation of the mitral valve annulus. (wikipedia.org)
  • Secondary mitral insufficiency is due to the dilatation of the left ventricle that causes stretching of the mitral valve annulus and displacement of the papillary muscles. (wikipedia.org)
  • The opening of the mitral valve is surrounded by a fibrous ring known as the mitral annulus. (wikipedia.org)
  • The mitral annulus is saddle shaped and changes in shape throughout the cardiac cycle. (wikipedia.org)
  • The normal diameter of the mitral annulus is 2.7 to 3.5 centimetres (1.1 to 1.4 in), and the circumference is 8 to 9 centimetres (3.1 to 3.5 in). (wikipedia.org)
  • The mitral annulus changes in shape and size during the cardiac cycle. (wikipedia.org)
  • medical citation needed] In regards to primary and secondary causes they are: Primary causes Rheumatic Myxomatous Ebstein anomaly Endomyocardial fibrosis Endocarditis Traumatic (blunt chest injury) Secondary causes LV dysfunction or valve disease Chronic lung disease Pulmonary thromboembolism Myocardial disease RV ischemia Left to right shunt Carcinoid heart disease In terms of the mechanism of tricuspid insufficiency it involves the expansion of the tricuspid annulus(fibrous rings of heart). (wikipedia.org)
  • Tricuspid insufficiency is linked to geometry changes of the tricuspid annulus ( decreased tricuspid annular release). (wikipedia.org)
  • patients
  • METHODS: In a group of nine patients, six of them underwent mitral valve replacement alone and three underwent both aortic and mitral valve replacements, all the mitral apparatus was preserved. (biomedsearch.com)
  • All of these patients had mechanical valves using CarboMedics cardiac prosthesis (CarboMedics, Inc. Austin, Texas). (biomedsearch.com)
  • MATERIAL/METHODS: Pre- and postoperative echocardiograms (n=454) acquired from 108 consecutive patients with chronic MR who underwent MV surgery were analyzed. (biomedsearch.com)
  • We therefore examined for echocardiographic changes in LV size and function following mitral surgery in consecutive patients referred for mitral surgery. (biomedsearch.com)
  • 162 patients with non rheumatic valve insufficiency undergoing repair between 1970 and 1984. (bestbets.org)
  • 951 patients with rheumatic mitral valve insufficiency, operated on from 1970 to 1994 at a single institution All patients received warfarin for 2 months and this was stopped as long as sinus rhythm was restored. (bestbets.org)
  • 235 patients between 1990 and 1995 underwent either mitral valve repair (MVr) or replacement (MVR): 122 patients were given Ticlopidine for 90 days. (bestbets.org)
  • Number of mitral repair patients: (n= 20). (bestbets.org)
  • The purpose of this study is to determine whether the addition of surgical ablation to planned mitral valve surgery for patients with persistent or longstanding persistent AF (within 6 months prior to randomization) reduces the incidence of postoperative heart arrhythmia compared to mitral valve repair with medication therapy alone. (clinicaltrials.gov)
  • For decades after, mitral valve replacement was the only surgical option for patients with a severely diseased mitral valve. (wikipedia.org)
  • Patients with mechanical heart valves who use warfarin for anticoagulation have to be on long-term anticoagulation therapy. (wikipedia.org)
  • A repair still involves major cardiac surgery but for many patients presents the significant advantage of avoiding blood thinners and may provide a more durable result. (wikipedia.org)
  • For patients with the most common type of mitral valve disease, termed "degenerative" or "myxomatous" mitral valve disease, repair rates are very high and long term durability is excellent. (wikipedia.org)
  • In the selection of patients, the complex spatial structure of the valve is displayed as it actually is, allowing a precise assessment of the culprit as well as of secondary lesions. (springer.com)
  • Quadricuspid aortic valves are very rare cardiac valvular anomalies with a prevalence of 0.013% to 0.043% of cardiac cases and a prevalence of 1 in 6000 patients that undertake aortic valve surgery. (wikipedia.org)
  • Mid-term results in patients having tricuspidization of the quadricuspid aortic valve. (wikipedia.org)
  • Homograft valves are donated by patients and recovered after the patient expires. (wikipedia.org)
  • This procedure is for patients who are not candidates for surgery or who have high risk for surgery. (wikipedia.org)
  • Post cardiothoracic surgery-most common and useful is counterpulsation in weaning patients from cardiopulmonary bypass after continued perioperative injury to myocardial tissue. (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)
  • Humans
  • 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)
  • Cardiopulmonary Bypass
  • Percutaneous coronary angioplasty In high risk coronary artery bypass graft surgery where cardiopulmonary bypass time was shortened, as well as during intubation period and hospital stay. (wikipedia.org)
  • secondary
  • Valve repair for mitral insufficiency secondary to idiopathic juvenile polyarthritis. (semanticscholar.org)
  • In contrast, Staphylococcus blood stream infections are frequently acquired in a health care setting where they can enter the blood stream through procedures that cause break in the integrity of skin like surgery, catheterisation or during access of long term indwelling catheters or secondary to intravenous injection of recreational drugs. (wikipedia.org)
  • tissue
  • Finally, artificial tissue valves will wear out - on average lasting between 10 and 15 years, requiring further surgery at an advanced age. (wikipedia.org)
  • There are two basic types of artificial heart valve, mechanical valves and tissue valves. (wikipedia.org)
  • Tissue heart valves are usually made from animal tissues, either animal heart valve tissue or animal pericardial tissue. (wikipedia.org)
  • There are alternatives to animal tissue valves. (wikipedia.org)
  • The durability of homograft valves is probably the same as for porcine tissue valves. (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)
  • surgical
  • We also investigated the effect of clinical and surgical factors on changes in LV size and function over time following surgery. (biomedsearch.com)
  • This is a randomized, multi-center trial which will enroll 260 subjects who will be randomized in a 1:1 fashion to: (a) mitral valve surgery plus surgical ablation or (b) mitral valve surgery without ablation (control group). (clinicaltrials.gov)
  • 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)
  • Aortic valve replacement is a surgical procedure in which a patient's aortic valve is replaced by a different valve. (wikipedia.org)
  • left atrium
  • After the left atrium fills with blood, the mitral valve allows blood to flow from the left atrium into the heart's main pumping chamber called the left ventricle. (wikipedia.org)
  • In normal conditions, blood flows through an open mitral valve during diastole with contraction of the left atrium, and the mitral valve closes during systole with contraction of the left ventricle. (wikipedia.org)
  • The valve opens and closes because of pressure differences, opening when there is greater pressure in the left atrium than ventricle, and closing when there is greater pressure in the ventricle than atrium. (wikipedia.org)
  • The mitral valve is typically 4 to 6 square centimetres (0.62 to 0.93 sq in) in area, and sits in the left heart between the left atrium and the left ventricle. (wikipedia.org)
  • heart valve
  • In 1923 Dr. Elliott Cutler of the Peter Bent Brigham Hospital performed the world's first successful heart valve surgery - a mitral valve repair. (wikipedia.org)
  • The Journal of Heart Valve Disease, 13(4), 534-537. (wikipedia.org)
  • The pericardial heart valve was invented by Marian Ionescu, a British surgeon working at the General Infirmary in Leeds, England. (wikipedia.org)
  • 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)
  • Pericardial
  • Based on these results, the Shiley Laboratory in Irvine, California, began to manufacture this valve and to distribute it worldwide under the name of the 'Ionescu - Shiley Pericardial Xenograft. (wikipedia.org)
  • These modifications had been progressively introduced and all of them were incorporated in the 'Ionescu - Shiley Low Profile Pericardial Xenograft' valve, which became available in 1983. (wikipedia.org)
  • 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)
  • Artificial
  • The development of the heart-lung machine in the 1950s paved the way for replacement of the mitral valve with an artificial valve in the 1960s. (wikipedia.org)
  • The artificial mitral valve has an elevated risk of stroke. (wikipedia.org)
  • 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)
  • Procedure
  • In this chapter we describe the normal mitral valve anatomy as displayed by 3D TEE, the 3D TEE pre-procedural characterization of valve morphology and the growing role of RT TEE in any individual steps of this complex procedure. (springer.com)
  • Another procedure for aortic valve replacement is the Ross procedure (after Donald Ross) or pulmonary autograft. (wikipedia.org)
  • The Ross procedure involves going to surgery to have the aortic valve removed and replacing it with the patient's own pulmonary valve. (wikipedia.org)
  • The ultimate goal of the procedure is the restoration of a normal form of the aortic valve, which will then lead to near-normal function and good durability of the repair. (wikipedia.org)
  • mechanical
  • The therapeutic range for most adults with a mechanical valve is an INR of 2.5-3.5. (wikipedia.org)
  • A new alternative is transcatheter aortic valve replacement (TAVR), which delivers a mechanical valve to the site of the diseased valve through a catheter. (wikipedia.org)
  • Mechanical failure of the balloon itself is also a risk which entails vascular surgery to remove under that circumstance. (wikipedia.org)
  • cusps
  • The aortic valve normally has three cusps - a left, right and posterior cusp. (wikipedia.org)
  • In this condition, instead of three cusps, the aortic valve has two cusps. (wikipedia.org)
  • 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)
  • 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)