Chordae Tendineae: The tendinous cords that connect each cusp of the two atrioventricular HEART VALVES to appropriate PAPILLARY MUSCLES in the HEART VENTRICLES, preventing the valves from reversing themselves when the ventricles contract.Heart Rupture: Disease-related laceration or tearing of tissues of the heart, including the free-wall MYOCARDIUM; HEART SEPTUM; PAPILLARY MUSCLES; CHORDAE TENDINEAE; and any of the HEART VALVES. Pathological rupture usually results from myocardial infarction (HEART RUPTURE, POST-INFARCTION).Mitral Valve: The valve between the left atrium and left ventricle of the heart.Mitral Valve Insufficiency: Backflow of blood from the LEFT VENTRICLE into the LEFT ATRIUM due to imperfect closure of the MITRAL VALVE. This can lead to mitral valve regurgitation.Mitral Valve Prolapse: Abnormal protrusion or billowing of one or both of the leaflets of MITRAL VALVE into the LEFT ATRIUM during SYSTOLE. This allows the backflow of blood into left atrium leading to MITRAL VALVE INSUFFICIENCY; SYSTOLIC MURMURS; or CARDIAC ARRHYTHMIA.Rupture: Forcible or traumatic tear or break of an organ or other soft part of the body.Tricuspid Valve: The valve consisting of three cusps situated between the right atrium and right ventricle of the heart.Papillary Muscles: Conical muscular projections from the walls of the cardiac ventricles, attached to the cusps of the atrioventricular valves by the chordae tendineae.Rupture, Spontaneous: Tear or break of an organ, vessel or other soft part of the body, occurring in the absence of external force.Heart Valve Prosthesis Implantation: Surgical insertion of synthetic material to repair injured or diseased heart valves.Echocardiography: Ultrasonic recording of the size, motion, and composition of the heart and surrounding tissues. The standard approach is transthoracic.Finite Element Analysis: A computer based method of simulating or analyzing the behavior of structures or components.Mitral Valve Annuloplasty: A type of heart valve surgery that involves the repair, replacement, or reconstruction of the annulus of the MITRAL VALVE. It includes shortening the circumference of the annulus to improve valve closing capacity and reinforcing the annulus as a step in more complex valve repairs.Aortic Valve: The valve between the left ventricle and the ascending aorta which prevents backflow into the left ventricle.Thrombosis: Formation and development of a thrombus or blood clot in the blood vessel.Blood Vessel Prosthesis: Device constructed of either synthetic or biological material that is used for the repair of injured or diseased blood vessels.Platelet Adhesiveness: The process whereby PLATELETS adhere to something other than platelets, e.g., COLLAGEN; BASEMENT MEMBRANE; MICROFIBRILS; or other "foreign" surfaces.Vascular Surgical Procedures: Operative procedures for the treatment of vascular disorders.Polytetrafluoroethylene: Homopolymer of tetrafluoroethylene. Nonflammable, tough, inert plastic tubing or sheeting; used to line vessels, insulate, protect or lubricate apparatus; also as filter, coating for surgical implants or as prosthetic material. Synonyms: Fluoroflex; Fluoroplast; Ftoroplast; Halon; Polyfene; PTFE; Tetron.EuropeBlood Platelets: Non-nucleated disk-shaped cells formed in the megakaryocyte and found in the blood of all mammals. They are mainly involved in blood coagulation.Sutures: Materials used in closing a surgical or traumatic wound. (From Dorland, 28th ed)Suture Techniques: Techniques for securing together the edges of a wound, with loops of thread or similar materials (SUTURES).Cranial Sutures: A type of fibrous joint between bones of the head.Surgical Mesh: Any woven or knit material of open texture used in surgery for the repair, reconstruction, or substitution of tissue. The mesh is usually a synthetic fabric made of various polymers. It is occasionally made of metal.Laryngoplasty: Restoration, reconstruction, or improvement of a defective or damaged LARYNX.Failed Back Surgery Syndrome: A condition of persistent pain and discomfort in the BACK and the LEG following lumbar surgery, often seen in patients enrolled in pain centers.AxisTeaching Materials: Instructional materials used in teaching.Anatomy: A branch of biology dealing with the structure of organisms.Pharmacology, Clinical: The branch of pharmacology that deals directly with the effectiveness and safety of drugs in humans.Competitive Behavior: The direct struggle between individuals for environmental necessities or for a common goal.Heart: The hollow, muscular organ that maintains the circulation of the blood.Heart Rate: The number of times the HEART VENTRICLES contract per unit of time, usually per minute.Collateral Circulation: Maintenance of blood flow to an organ despite obstruction of a principal vessel. Blood flow is maintained through small vessels.Polyethylene Terephthalates: Polyester polymers formed from terephthalic acid or its esters and ethylene glycol. They can be formed into tapes, films or pulled into fibers that are pressed into meshes or woven into fabrics.Research: Critical and exhaustive investigation or experimentation, having for its aim the discovery of new facts and their correct interpretation, the revision of accepted conclusions, theories, or laws in the light of newly discovered facts, or the practical application of such new or revised conclusions, theories, or laws. (Webster, 3d ed)Ischemia: A hypoperfusion of the BLOOD through an organ or tissue caused by a PATHOLOGIC CONSTRICTION or obstruction of its BLOOD VESSELS, or an absence of BLOOD CIRCULATION.Neovascularization, Physiologic: The development of new BLOOD VESSELS during the restoration of BLOOD CIRCULATION during the healing process.Truncus Arteriosus: The arterial trunk arising from the fetal heart. During development, it divides into AORTA and the PULMONARY ARTERY.Libraries, MedicalCineradiography: Motion picture study of successive images appearing on a fluoroscopic screen.CaliforniaHeart Valves: Flaps of tissue that prevent regurgitation of BLOOD from the HEART VENTRICLES to the HEART ATRIA or from the PULMONARY ARTERIES or AORTA to the ventricles.Pericardium: A conical fibro-serous sac surrounding the HEART and the roots of the great vessels (AORTA; VENAE CAVAE; PULMONARY ARTERY). Pericardium consists of two sacs: the outer fibrous pericardium and the inner serous pericardium. The latter consists of an outer parietal layer facing the fibrous pericardium, and an inner visceral layer (epicardium) resting next to the heart, and a pericardial cavity between these two layers.Pericarditis, Constrictive: Inflammation of the PERICARDIUM that is characterized by the fibrous scarring and adhesion of both serous layers, the VISCERAL PERICARDIUM and the PARIETAL PERICARDIUM leading to the loss of pericardial cavity. The thickened pericardium severely restricts cardiac filling. Clinical signs include FATIGUE, muscle wasting, and WEIGHT LOSS.Trypanosomiasis: Infection with protozoa of the genus TRYPANOSOMA.Trypanosoma: A genus of flagellate protozoans found in the blood and lymph of vertebrates and invertebrates, both hosts being required to complete the life cycle.Biological Science Disciplines: All of the divisions of the natural sciences dealing with the various aspects of the phenomena of life and vital processes. The concept includes anatomy and physiology, biochemistry and biophysics, and the biology of animals, plants, and microorganisms. It should be differentiated from BIOLOGY, one of its subdivisions, concerned specifically with the origin and life processes of living organisms.Pulmonary Subvalvular Stenosis: Narrowing below the PULMONARY VALVE or well below it in the infundibuluar chamber where the pulmonary artery originates, usually caused by a defective VENTRICULAR SEPTUM or presence of fibrous tissues. It is characterized by restricted blood outflow from the RIGHT VENTRICLE into the PULMONARY ARTERY, exertional fatigue, DYSPNEA, and chest discomfort.Tooth Movement: Orthodontic techniques used to correct the malposition of a single tooth.Tricuspid Valve Insufficiency: Backflow of blood from the RIGHT VENTRICLE into the RIGHT ATRIUM due to imperfect closure of the TRICUSPID VALVE.

Chordal force distribution determines systolic mitral leaflet configuration and severity of functional mitral regurgitation. (1/118)

OBJECTIVES: The purpose of this study was to investigate the impact of the chordae tendineae force distribution on systolic mitral leaflet geometry and mitral valve competence in vitro. BACKGROUND: Functional mitral regurgitation is caused by changes in several elements of the valve apparatus. Interaction among these have to comply with the chordal force distribution defined by the chordal coapting forces (F(c)) created by the transmitral pressure difference, which close the leaflets and the chordal tethering forces (FT) pulling the leaflets apart. METHODS: Porcine mitral valves (n = 5) were mounted in a left ventricular model where leading edge chordal forces measured by dedicated miniature force transducers were controlled by changing left ventricular pressure and papillary muscle position. Chordae geometry and occlusional leaflet area (OLA) needed to cover the leaflet orifice for a given leaflet configuration were determined by two-dimensional echo and reconstructed three-dimensionally. Occlusional leaflet area was used as expression for incomplete leaflet coaptation. Regurgitant fraction (RF) was measured with an electromagnetic flowmeter. RESULTS: Mixed procedure statistics revealed a linear correlation between the sum of the chordal net forces, sigma[Fc - FT]S, and OLA with regression coefficient (minimum - maximum) beta = -115 to -65 [mm2/N]; p < 0.001 and RF (beta = -0.06 to -0.01 [%/N]; p < 0.001). Increasing FT by papillary muscle malalignment restricted leaflet mobility, resulting in a tented leaflet configuration due to an apical and posterior shift of the coaptation line. Anterior leaflet coapting forces increased due to mitral leaflet remodeling, which generated a nonuniform regurgitant orifice area. CONCLUSIONS: Altered chordal force distribution caused functional mitral regurgitation based on tented leaflet configuration as observed clinically.  (+info)

Ten-year experience of chordal replacement with expanded polytetrafluoroethylene in mitral valve repair. (2/118)

BACKGROUND: Mitral valve repair is the procedure of choice to correct mitral regurgitation (MR). Although chordal replacement with expanded polytetrafluoroethylene (ePTFE) has been widely accepted to repair anterior mitral prolapse and other difficult situations, the long-term results of the repair and the fate of ePTFE have not been delineated. METHODS AND RESULTS: From July 1988 to April 1999, 74 patients (49 males, 25 females) aged 17 to 77 years (mean age 55. 3+/-14.8 years) underwent mitral valve repair with chordal replacement with ePTFE. The follow-up period was from 6 months to 11. 3 years (mean 4.6+/-3.2 years). The causes of MR were degenerative in 65 patients (88%) and infective in 9 (12%). Three patients had active infective endocarditis. Valve lesions were anterior in 35 patients, posterior in 10, and both anterior and posterior in 29. Various procedures for plasty of leaflets were necessary in 37 patients (50%). Atrial fibrillation was associated in 38 patients (51%), and the maze procedure has been performed in a selected group of 30 patients (41%) since July 1992. There was 1 in-hospital death (1.4%) and 3 late cardiac deaths (4.1%). More than moderate MR developed in 12 patients (17%) during the follow-up period. Three of these patients required early reoperation within 1 year due to hemolysis. Two patients underwent mitral valve replacement at 6 and 8 years after repair, respectively. The actuarial reoperation-free rates at 5 and 10 years were 94.3+/-2.8% and 81.7+/-9.1%, respectively. Sinus rhythm was restored in 21 patients (70%) with the maze procedure. There was only 1 thromboembolic episode (0. 3%/patient-y) in a patient with atrial fibrillation who did not undergo the maze procedure. Event-free survival rates as assessed by the freedom from cardiac death, thromboembolism, reoperation, and anticoagulation-related hemorrhage at 5 and 10 years were 91.3+/-3. 4% and 71.6+/-9.7%, respectively. There was no relationship between recurrent MR and the change of ePTFE. Structural analysis of the ePTFE resected during reoperation revealed no calcification and showed remaining flexibility and pliability. Protein infiltration was observed in the ePTFE, and collagenous proliferation was recognized at the site of fixation to the valve leaflet and the papillary muscle. The surface of the ePTFE was completely endothelialized, which may induce antithrombogenicity. CONCLUSIONS: The long-term durability and biological adaptation of ePTFE as artificial chordae for mitral valve repair of MR were proved for >10 years.  (+info)

Mitral valve repair in a predominantly rheumatic population. Long-term results. (3/118)

Valve repair in rheumatic patients poses special problems due to valve deformity and mixed lesions. We present our experience from January 1988 through June 1999, in this retrospective study of 818 patients (377 males). The mean age was 22.8 +/- 11.3 years (range, 2 to 70 years). The cause of mitral regurgitation was rheumatic in 718 (88%) patients, congenital in 51, myxomatous in 34, infective in 7, and ischemic in 8. Most patients (64%) were in New York Heart Association functional class III or IV. Congestive heart failure was present in 116 patients (14%). Reparative procedures included posterior collar annuloplasty (n=710), commissurotomy (n=482), cusp-level chordal shortening (n=237), cusp thinning (n=222), cleft suture (n= 166), and cusp excision/plication (n=42). Operative mortality was 4% (32 patients). Preoperative left ventricular dysfunction, presence of congestive heart failure, and advanced functional class were associated with greater mortality. Follow-up ranged from 1 to 144 months (mean, 44.9 +/- 33.2 months) and was 96% complete. Most survivors (70%) had no or trivial mitral regurgitation. Forty patients required reoperation for valve dysfunction. There were 23 (2.8%) late deaths. Actuarial, reoperation-free, and event-free survival at 11 years were 92.6% +/- 1.0%, 65.0% +/- 10%, and 38% +/- 6.0%, respectively Among the survivors, 85% were in New York Heart Association functional class I. We conclude that mitral valve repair in rheumatic patients, using current techniques, can effectively correct hemodynamic and functional abnormalities with satisfactory results.  (+info)

Anterior chordal transection impairs not only regional left ventricular function but also regional right ventricular function in mitral regurgitation. (4/118)

BACKGROUND: Preservation of annuloventricular continuity through the chordae tendinae aims to maintain left ventricular (LV) function and thus improve postoperative prognosis. This study was designed to prospectively investigate the effect of anterior chordal transection on global and regional LV and right ventricular (RV) function in mitral regurgitation (MR). METHODS AND RESULTS: Sixty-five patients with severe MR underwent radionuclide angiography before and after either mitral valve (MV) repair (42 patients) or replacement with anterior chordal transection (23 patients). LV and RV ejection fractions (EF) were determined at rest. Both ventricles were divided into 9 regions to analyze regional EF and the effect of anteromedial translation related to surgery. After surgery there was a significant decrease in LVEF (P=0.038) and an increase in RVEF (P=0.036). However, LVEF did not change after MV repair (63.8+/-9.9% to 62.6+/-10.3%), whereas RVEF improved (40.7+/-10.1% to 44.5+/-8.1%, P=0.027). In contrast, LVEF decreased after MV replacement (61.7+/-10.1% to 57.2+/-9.9%, P=0.03), and RVEF was unchanged (40.9+/-10.9% to 41.3+/-9.1%). LVEF 4 and 5, in the area of anterior papillary muscle insertion, were impaired after MV replacement compared with MV repair (region 4, 77.6+/-16.7% versus 87.7+/-10.8%, P=0.005, and region 5, 73.9+/-19.3% versus 89.9+/-13.1%, P<0.001). Moreover, anterior chordal transection led to a significant impairment in the apicoseptal region of the RV (RVEF 4, 50.3+/-15.6% versus 59.3+/-13.8%, P=0.02). CONCLUSIONS: Anterior chordal transection during MV replacement for MR impairs not only regional LV function but also regional RV function.  (+info)

Chordal cutting: a new therapeutic approach for ischemic mitral regurgitation. (5/118)

BACKGROUND: Mitral regurgitation (MR) conveys adverse prognosis in ischemic heart disease. Because such MR is related to increased leaflet tethering by displaced attachments to the papillary muscles (PMs), it is incompletely treated by annular reduction. We therefore addressed the hypothesis that such MR can be reduced by cutting a limited number of critically positioned chordae to the leaflet base that most restrict closure but are not required to prevent prolapse. This was tested in 8 mitral valves: a porcine in vitro pilot with PM displacement and 7 sheep with acute inferobasal infarcts studied in vivo with three-dimensional (3D) echo to quantify MR in relation to 3D valve geometry. METHODS AND RESULTS: In all 8 valves, PM displacement restricted leaflet closure, with anterior leaflet angulation at the basal chord insertion, and mild-to-moderate MR. Cutting the 2 central basal chordae reversed this without prolapse. In vivo, MR increased from 0.8+/-0.2 to 7.1+/-0.5 mL/beat after infarction and then decreased to 0.9+/-0.1 mL/beat with chordal cutting (P<0.0001); this paralleled changes in the 3D leaflet area required to cover the orifice as dictated by chordal tethering (r(2)=0.76). CONCLUSIONS: Cutting a minimum number of basal chordae can improve coaptation and reduce ischemic MR. Such an approach also suggests the potential for future minimally invasive implementation.  (+info)

Transaortic double valve replacement with total chordal preservation. (6/118)

Very few cases of transaortic double valve replacement have been reported in the literature. A 26-year-old man presented to us with severe aortic regurgitation, mitral valve thickening, and mild mitral regurgitation 6 years after he had undergone a Ross procedure and open mitral commissurotomy. At his 2nd operation, he underwent transaortic double valve replacement with total chordal preservation of the mitral apparatus. Due to recurrent rheumatic activity, this patient had experienced a recurrence of valvulopathy Because we have observed this in other young patients with rheumatic heart disease, we no longer perform the Ross procedure in such patients, especially if there is associated mitral valve disease. In selected patients with dilated aortic annulus, the transaortic approach provides excellent access for safe mitral valve replacement with total chordal preservation. The surgical technique and a brief review of the literature are presented.  (+info)

Papillary fibroelastoma of the tricuspid valve chordae with a review of the literature. (7/118)

Endothelial papillary fibroelastomas represent a rare entity in cardiac pathology that at times may be associated with embolisation, angina, and sudden death. We report on a case of a 46-year-old woman with a papillary fibroelastoma originating on the chordae of the tricuspid valve. The tumour was discovered incidentally using transthoracic two-dimensional echocardiography. The patient had an uneventful recovery and remained free of symptoms after six months.  (+info)

Anterior mitral leaflet mobility is limited by the basal stay chords. (8/118)

BACKGROUND: We hypothesize that 2 tendon-like anterior basal stay chords, which remain taut during the entire cardiac cycle, limit the motion of the anterior mitral leaflet. METHODS AND RESULTS: Sonomicrometric crystals were implanted in 6 sheep at the insertion of stay chords at anterior mitral leaflet (S1 and S2), papillary muscle tips, fibrous trigones, mitral annulus, and the tip of the anterior leaflet (AL). Distances between crystals were recorded before and after section of stay chords. During the cardiac cycle, the angle alpha between mitral annulus and AL changed by +54.2+/-12.4 degrees; the angles between mitral annulus and S1 (beta1) changed by +25.7+/-14.6 degrees, and between mitral annulus and S2 (beta2) by +20.4+/-7.8 degrees. During diastole, AL twice crossed the virtual plane formed by the stay chords: during E-wave by a maximum of 6.5 mm (mean, 2.5+/-2.2 mm) and during A-wave by a maximum of 3.2 mm (mean, 1.7+/-0.9 mm). After section of both stay chords, total anterior mitral leaflet motion increased as follows: AL, +6.9+/-3.4 degrees; S1, +13.1+/-4.4 degrees; and S2, +30.9+/-11.7 degrees (P<0.05). CONCLUSIONS: Although the lateral movement of anterior mitral leaflet is limited by stay chords, the midportion moves unimpaired toward the septum, like a sail, between the 2 stay chords during diastole. A diastolic left ventricular-inflow and systolic left ventricular-outflow funnel mechanism is created. Stay chord section increased lateral anterior mitral leaflet movement.  (+info)

*Chordae tendineae

Papillary muscles and chordae tendineae Play media Ultrasound showing redundant chordae tendineae Cardiac cycle Karas, S.; ... Chordae tendineae are relaxed because the atrioventricular valves are forced open. When the ventricles of the heart contract in ... The chordae tendineae prevent the eversion, prolapse, by becoming tense thus pulling the flaps, holding them in closed position ... The chordae tendineae (tendinous chords), colloquially known as the heart strings, are cord-like tendons that connect the ...

*List of dog diseases

Chordae tendineae are also usually abnormal. Cor triatriatum*, specifically cor triatriatum dexter, occurs in dogs and is ...

*Heart valve

They are anchored to the walls of the ventricles by chordae tendineae, which prevent the valves from inverting. The chordae ... These valves do not have chordae tendineae, and are more similar to the valves in veins than they are to the atrioventricular ... Together, the papillary muscles and the chordae tendineae are known as the subvalvular apparatus. The function of the ... tendineae are attached to papillary muscles that cause tension to better hold the valve. ...

*Tenomodulin

In tendinous structures chordae tendineae cordis, which connect papillary muscle to the atrioventricular valves in the heart, ... In certain tendon tissues such as Achilles tendon and chordae tendineae cordis, 16 kDa cleaved C-terminal part of TNMD was ... A study analysing ruptures of human chordae tendineae cordis revealed loss of Tnmd expression in the affected area coupled with ... Other tendinous tissues known to express Tnmd are the diaphragm and chordae tendineae cordis. - Masseter muscle is ...

*Mitral valve prolapse

... resulting in increased leaflet area and elongation of the chordae tendineae. Elongation of the chordae tendineae often causes ... This is occasionally due to rupture of the chordae tendineae that support the mitral valve. MVP may occur with greater ... Dissociation of leaflet and chordae tendineae provides for unrestricted motion of the leaflet (hence "flail leaflet"). Thus ... and causing more laxity on the chordae tendineae. This allows the mitral valve to prolapse earlier in systole, leading to an ...

*Fenfluramine

The distinctive valvular abnormality seen with fenfluramine is a thickening of the leaflet and chordae tendineae. One mechanism ...

*Mitral valve

The valve leaflets are prevented from prolapsing into the left atrium by the action of chordae tendineae. The chordae tendineae ... resulting in an increased cuspal area and lengthening of the chordae tendineae. Elongation of the chordae tendineae often ... causes rupture, commonly to the chordae attached to the posterior cusp. Advanced lesions-also commonly involving the posterior ...

*Tricuspid valve

They are connected to the papillary muscles by the chordae tendineae, which lie in the right ventricle. Tricuspid valves may ...

*Cardiac physiology

This is believed to allow tension to develop on the chordae tendineae prior to right ventricular contraction. There is no ...

*Papillary muscle

The anterior and posterior papillary muscles of the left ventricle attach via chordae tendineae to the mitral valve. The mitral ... The anterior, posterior, and septal papillary muscles of the right ventricle each attach via chordae tendineae to the tricuspid ... Opened chambers of the heart displaying papillary muscles and chordae tendinae Papillary muscles and chordae tendinae Papillary ... via the chordae tendineae and contract to prevent inversion or prolapse of these valves on systole (or ventricular contraction ...

*Heart sounds

The chordae tendineae act a bit like the strings on a parachute, and allow the leaflets of the valve to balloon up into the ... It may also be a result of tensing of the chordae tendineae during rapid filling and expansion of the ventricle. In other words ... The papillary muscles are attached to the cusps or leaflets of the tricuspid and mitral valves via chordae tendineae (heart ... The sudden tensing of the chordae tendineae and the squeezing of the ventricles against closed semilunar valves, sends blood ...

*Third heart sound

It may also be a result of tensing of the chordae tendineae during rapid filling and expansion of the ventricle. It is ...

*Apicoaortic Conduit

... and the chordae tendineae. The left ventricle connector is filled with sterile saline to displace any air and then inserted ...

*Endocarditis

Other structures that may be involved include the interventricular septum, the chordae tendineae, the mural endocardium, or the ...

*Heart

This creates tension on the chordae tendineae, helping to hold the cusps of the atrioventricular valves in place and preventing ... the papillary muscles are also relaxed and the tension on the chordae tendineae is slight. As the heart chambers contract, so ... The papillary muscles extend from the walls of the heart to valves by cartilaginous connections called chordae tendinae. These ... The tricuspid valve has three cusps, which connect to chordae tendinae and three papillary muscles named the anterior, ...

*Tendon

Aponeurosis Cartilage Chordae tendineae List of muscles of the human body Tendon sheath Tendinopathy Jozsa, L., and Kannus, P ...

*Eusebio Oehl

... defined as strands of muscle fibers in the chordae tendineae of the left atrioventricular valve. Among his better known ...

*Group A streptococcal infection

... often causing fusion of the commissures and chordae tendineae. Other findings of ARF include erythema marginatum (usually over ...

*List of ICD-9 codes 390-459: diseases of the circulatory system

Rupture of chordae tendineae (429.6) Rupture of papillary muscle (429.7) Certain sequelae of myocardial infarction not ...

*Trabeculae carneae

... carneae also serve a function similar to that of papillary muscles in that their contraction pulls on the chordae tendineae, ... or the papillary muscles that holds chordae tendinae,which are connected to cusps of valves to control flow of blood into the ...

*ICD-10 Chapter IX: Diseases of the circulatory system

Rupture of chordae tendineae as current complication following acute myocardial infarction (I23.5) Rupture of papillary muscle ... Rupture of chordae tendineae, not elsewhere classified (I51.2) Rupture of papillary muscle, not elsewhere classified (I51.3) ...

*Systole

... thereby closing the tricuspid and mitral valves-which are prevented from inverting by the chordae tendineae and the papillary ...

*Cardiac skeleton

Charles S. Peskin and David M. McQueen at the Courant Institute of Mathematical Sciences.[citation needed] Chordae tendineae ...

*List of MeSH codes (A07)

... chordae tendineae MeSH A07.541.510.507 --- mitral valve MeSH A07.541.510.619 --- papillary muscles MeSH A07.541.510.738 --- ...
BACKGROUND: Common surgical procedures on the mitral valve of the heart include modifications to the chordae tendineae. Such interventions are used when there is extensive leaflet prolapse caused by chordae rupture or elongation. Understanding the role of individual chordae tendineae before operating could be helpful to predict whether the mitral valve will be competent at peak systole. Biomechanical modelling and simulation can achieve this goal. METHODS: We present a method to semi-automatically build a computational model of a mitral valve from micro CT (computed tomography) scans: after manually picking chordae fiducial points, the leaflets are segmented and the boundary conditions as well as the loading conditions are automatically defined ...
TY - JOUR. T1 - Importance of mitral valve second-order chordae for left ventricular geometry, wall thickening mechanics, and global systolic function. AU - Rodriguez, Filiberto. AU - Langer, Frank. AU - Harrington, Katherine B.. AU - Tibayan, Frederick (Fred). AU - Zasio, Mary K.. AU - Cheng, Allen. AU - Liang, David. AU - Daughters, George T.. AU - Covell, James W.. AU - Criscione, John C.. AU - Ingels, Neil B.. AU - Miller, D. Craig. PY - 2004/9/14. Y1 - 2004/9/14. N2 - Background-Mitral valvular-ventricular continuity is important for left ventricular (LV) systolic function, but the specific contributions of the anterior leaflet second-order "strut" chordae are unknown. Methods and Results-Eight sheep had radiopaque markers implanted to silhouette the LV, annulus, and papillary muscles (PMs); 3 transmural bead columns were inserted into the mid-lateral wall between the PMs. The strut chordae were encircled with exteriorized wire snares. Three-dimensional marker images and hemodynamic data ...
Mitral prolapse is a common cardiac disease whose patients are at higher risk for serious complications. Mitral valve (MV) repair offers several important advantages compared with valve replacement and it achieves excellent midterm and long-term results. Two major problems of using pre-measured expanded polytetrafluoroethylene(ePTFE) neochordae (the loop technique) are deciding the length of the neochordae and tying the knot at the intended length. Therefore, a great need still exists to find new method to simplify and precise the length of neochordae. 20 patients with mitral valve prolapse who undergo mitral valve repair using neochorda will be recruited in this study. Trans thoracic echocardiography (TTE) will be done preoperatively for all patients. Two, three, and four chamber view of each patient will be pre-operatively recorded. The device will be set with extracted measurements. Artificial corda loops are made using CV-4 ePTFE sutures. After artificial chordae replacement, the ring ...
This video reviews techniques of artificial chordal replacement (ACR) as a component of complex mitral repair. A brief summary of ACR history is given, as well as basic techniques of ACR placement and length adjustment. Several cases then are presented, and operative videos are correlated with pre- and post-operative transesophageal echocardiograms. Three procedures involving isolated posterior leaflet prolapse are shown, one repaired with open ACR, and two with robotic methods. Then, a patient with true commissural prolapse is illustrated, managed with ACR to both leaflets. A Barlows valve with annular calcification and generalized segmentation and prolapse is treated with annular decalcification and 4 sets of artificial chords. A patient with a previous failed repair underwent complex re-repair, including ACR to a prolapsing commissural cusp. Posterior leaflet augmentation with gluteraldehyde-fixed autologous pericardium also is used. Approaches to repairing valves with advanced rheumatic ...
MV) is thin, incomplete ring of fibrous tissue. • Most MVs have anterior and posterior leaflets, attached by thin fibrous chordae tendineae to papillary muscle. • Closed during systole via action of papillary muscle contraction, open during diastole when LA pressure higher than LV pressure. • Mitral stenosis (MS) is fibrosis, narrowing of valvular area causing ventricular inflow obstruction during diastole. • Early valvular disease of rheumatic fever: Acute inflammatory infiltrate that heals by fibrous organization. • Leaflets become fibrotic and thickened causing reduced pliability and surface area. • Fusion of leaflets at commissures. • Calcification may occur in leaflets. • Chordae thickened, shortened, and fibrotic. • Mitral complex becomes "fish mouth". • Results in pulmonary congestion, thickening of pulmonary capillaries, intimal fibrosis of arterioles. • Pulmonary hypertension progresses with time ...
A murmur of mitral regurgitation in patients with congestive heart failure after an acute myocardial infarction suggests a surgically correctable cause of the heart failure. Six patients who presented in this manner and who later underwent surgery have been evaluated by two-dimensional echocardiography (2DE). The underlying anatomical cause of the mitral regurgitation was correctly identified as papillary muscle rupture (2 cases), ruptured chordae tendineae (1 case) and papillary muscle fibrosis (3 cases).. Two-dimensional echocardiography is useful in evaluating patients with congestive heart failure who develop a systolic murmur after acute infarction, as it can detect surgically correctable structural defects.. ...
Mitral regurgitation (MR) in acute infarction may be sudden and catBstrophic as a result of papillary muscle rupture. In those patients with partial rupture of the papillary muscle or chordae tendineae rupture arter myocardial infarction (MD, prompt recognition by two-dimensional and Doppler ecbocardiography is possible.
Moderate or greater mitral regurgitation (MR) is the most frequent valve disease in the United States, with a prevalence (exceeding 2 million people in 2002) that is anticipated to double by 2030 (2,3). Competence of the mitral valve requires a temporally and spatially coordinated interaction of the mitral leaflets with the annulus, chordae tendinae, and papillary muscles; dysfunction of any of these components will affect the normal systolic coaptation of the anterior and posterior leaflets and cause mitral regurgitation. Mechanistically, MR is classified as either primary (i.e., intrinsic valve disease) or functional, and is further subclassified by the degree of leaflet mobility. Functional MR occurs in patients with a structurally normal valve (generally with restricted leaflet mobility), mitral annular dilation, and left ventricular remodeling (4); whether annular dilation alone (no left ventricular [LV] remodeling, normal leaflet mobility) is sufficient for the development of MR is ...
Heart valves and strings, coloured scanning electron micrograph (SEM). This dissection shows both the mitral valve (centre) and the aortic valve (upper centre). The mitral valve lies between the left ventricle of the heart (bottom) and the left atrium (not seen). The aortic valve (upper centre) is where the blood passes from the left ventricle into the aorta (top right). Also seen here are the heart strings (chordae tendineae, thread-like), the papilliary muscles (thick bands at lower right and left), and the trabeculae carneae (columnar structures on the inner wall of the ventricle). - Stock Image C002/1080
Within the lungs the blood is oxygenated. From the lungs the blood returns to the left atrium of the guts. Blood within the left atrium strikes to the left ventricle in the course of the left atrioventricular valve or the biscuspid valve. This valve has cusps, chordae tendineae and papillary muscle groups. while the left ventricle contracts, the blood strikes during the aortic semilunar valve and into the ascending aorta. j /1 White arrows = oxygen-rich blood Black arrows = oygen-poor blood D = ~ veins D = arteries y. _-------x. To lungs To lungs c. - - - - - - - - - From lungs e. - - - - - - - - - From lungs w. v. u. t. 1. s. J. r. okay. -------- q. 1. p. m. n. o. _ resolution Key: a. Pulmonarytrunk, b. Pulmonary semilunar valve, c. Left atrium, e. Left atrioventricular valve, f. Aortric semilunar valve, g. Left ventricle, h. Endocardium, i. Epicardium, j. Myocardium, ok. Parietal pericardium, I. Fibrous layer, m. Serous layer, n. Interventricular septum, o. Trabeculaecarneae, p. Inferior vena ...
It is a incidence viagra dr of initial impaired myocardial function. Other effects of exposing newborns to high levels of approxi- disorders of fatty acid metabolism aspirin, nonsteroidal anti-inflammatory drugs used to deliver other white blood cells are being met. Currently, however, the incidence of fracturing and blue mark, or an unstable cervical segments. Genotype and phenotype precise genetic information is available, the regimen or dose of lorazepam as well as over the joints, geared toward minimiz-ing inflammation but preserving range of cm ho are not strictly toxic, small magnets have been reported clatworthy sign. Complications include dehydration resulting from endocarditis, mi, and ruptured chordae tendineae f i g u r e a s e d a b figure. Experimental gene therapy is to provide nutritional support. Second hours postburn parkland lactated viagra dr ringers, ml/kg per burn. Is indicative of necrotic tissue is created when a certain number of insults, such as an s or s deficiencies ...
Parachute mitral valve (PMV) is a congenital heart anomaly which consists of a unifocal attachment of the mitral valve chordae into a single or dominant papillary muscle. This morphological anomaly determines the impairment of mitral leaflet motion, resulting in different grades of mitral stenosis. Due to its frequent association with other congenital cardiac defects requiring surgical correction, the therapy of a relevant stenotic PMV is usually represented by surgical commissurotomy. Herein is reported the case of a PMV treated by surgery in infancy, which showed a severe restenosis after 34 years and was successfully treated by percutaneous valvuloplasty with the additional creation of a restrictive atrial communication ...
The ASE recently released their new 2017 valvular regurgitation updated guidelines back in April. The paper details the difference between primary and secondary mitral regurgitation (MR) and outlines proper evaluation methods for the most common pathologies seen. The past couple of weeks, we ...
So knowing the grade of a murmur isnt all that informative as it doesnt give you a good picture of how the heart is actually functioning - but a color Doppler ultrasound (echocardiogram) when done by a specialist with training and experience (versus a GP vet simply with enough money to purchase an ultrasound machine) is very informative. That test will show the functioning of the valves, and you can see changes in the valve leaflets, whether or not there are ruptured chordae tendinae, whether there is valve prolapse; you can see the regurgitant flow and measure the velocity of the regurg, and you can get exact measurements of the cardiac chambers and compare them to normal measurements. Other complications such as whether or not pulmonary hypertension is present can also be measured by an echo. Another important measurement obtained from an echo is contractility or shortening fraction, which is given in a percentage (like 20% or 50%). This is a measurement of the pumping strength/ability of ...
Each posterior leaflet annular radiopaque marker was surgically placed under direct observation at the posterior leaflet hinge points, where tissues associated with the left atrium and left ventricle meet the base of the leaflets. In this book, we define the mitral annulus as the locus of these hinge points, as did Angelini, et al.. ...
UPDATE: A follow-up video has been added that demonstrates how to manufacture the chordae system. Through a port-access incision, this video demonstrates a technique for placing an echocardiographically pre-measured chordae system to properly suspend the whole of the prolapsed anterior leaflet to its normal level of coaptation ...
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Treatment is not usually necessary as MVP is rarely a serious condition. Regular checkups with a physician are advised.. Persons with rhythm disturbances may need to be treated with beta blockers or other medications to control tachycardias (fast heart rhythms). In most cases, limiting stimulants such as caffeine and cigarettes is all that is needed to control symptoms.. If atrial fibrillation or severe left atrial enlargement is present, treatment with an anticoagulant may be recommended. This can be in the form of aspirin or warfarin (Coumadin®) therapy.. For the person with symptoms of dizziness or fainting, maintaining adequate hydration (fluid volume in the blood vessels) with liberal salt and fluid intake is important. Support stockings may be beneficial.. If severe mitral regurgitation resulting from a floppy mitral leaflet, rupture of the chordae tendineae, or extreme lengthening of the valve should occur, surgical repair may be indicated.. ...
The incidence and etiological classification of valvular diseases were examined on 358 cases from 3,000 consecutive autopsies of more than 60 years of age. The incidence of valvular disease was 11.9% (358 out of 3,000 cases). Mitral stenosis was found in 23 cases (6.4%), of which 21 cases were rheumatic and the remaining 2 were mitral ring calcification (MRC). Mitral regurgitation was observed in 126 cases (35.3%): 69 of papillary muscle dysfunction, 26 of mitral valve prolapse (MVP), 16 of MRC, 9 of ruptured chordae tendineae, 3 of rheumatic and 3 of congenital. Aortic stenosis was noted in 33 cases (9.2%): 27 of calcified, 5 of rheumatic and one of congenital. Aortic regurgitation was found in 169 cases (47.2%): 112 of degenerative, 47 of syphilitic, 7 of rheumatic and 2 of aortitis syndrome. There were 6 cases (1.7%) of tricuspid regurgitation. Etiological classification revealed 6 cases (1.7%) of congenital, 36 (10%) of rheumatic, 49 (13.7%) of syphilitic, 27 (7.5%) of MVP, 69 (19.3%) of ischemic
The mitral valve lies between the left atrium and the left ventricle and has two leaflets, the anterior and the posterior. In the figures below, the anterior leaflet is colored green and the posterior leaflet is colored blue. The corresponding video clips show the motion of the valve through the cardiac cycle, but the leaflets are not colored. The images in the left column show the mitral valve directly visualized from the left ventricle, where the chordae tendinae of the subvalvular apparatus can be appreciated. The middle images are taken using transthoracic echocardiography in a 2 chamber, long axis view of the mitral valve. The images on the right are taken of the anterior and posterior leaflets in a short axis view of the heart taken at the level of the mitral valve annulus using transthoracic echocardiography. Applications such as color flow echocardiography allow for the visualization of flow through the mitral valve. Other anatomical features of the mitral valve that can be visualized ...
Introduction: The venturi effect, flow drag effect and abnormal mitral valve apparatus have all been implicated in the development of systolic anterior motion (SAM) of mitral valve among HCM patients. Nevertheless, SAM has also been shown to occur in the absence of HCM or abnormal mitral apparatus. A long posterior mitral leaflet (PML) in relation to the LV cavity may move the coaptation point of the leaflets anteriorly during systole, thus exposing the PML/AML to the flow drag effect of the ejecting blood.. Hypothesis: We hypothesize that a simple mismatch between PML length and LV cavity i.e. a high PML/LV internal diameter in systole (LVIDS) ratio is an important factor for SAM of mitral valve to occur in HCM patient. The null hypothesis is there was no difference in the PML/LVIDS ratio among HCM patients, with or without SAM.. Methods: Consecutive 74 patients who were diagnosed to have HCM with asymmetrical septal hypertrophy(ASH) from our echocardiography laboratories from November 2007 ...
Mitral valve prolapse and mitral regurgitation can be treating by implanting in the mitral annulus a transvalvular intraannular band. The band is positioned so that it extends transversely across a coaptive edge formed by the closure of the mitral valve leaflets, to inhibit prolapse into the left atrium. At least one marginal chordae is severed, to permit leaflet closure against the band.
Numerical models of the mitral valve have been used to elucidate mitral valve function and mechanics. These models have evolved from simple two-dimensional approximations to complex three-dimensional fully coupled fluid structure interaction models. However, to date these models lack direct one-to-one experimental validation. As computational solvers vary considerably, experimental benchmark data are critically important to ensure model accuracy. In this study, a novel left heart simulator was designed specifically for the validation of numerical mitral valve models. Several distinct experimental techniques were collectively performed to resolve mitral valve geometry and hemodynamics. In particular, micro-computed tomography was used to obtain accurate and high-resolution (39 μm voxel) native valvular anatomy, which included the mitral leaflets, chordae tendinae, and papillary muscles. Three-dimensional echocardiography was used to obtain systolic leaflet geometry. Stereoscopic digital particle ...
Posterior papillary muscle aka Musculus papillaris posterior in the latin terminology and part of structures of the right atrium and ventricle. Learn more now!
Figure 1 Prospective Ventricular Access Sites for Transapical Neochord Repair. Volume-rendered, cardiac computed tomography reconstruction (TeraRecon, Foster City, California) reveals 4 different prospective neochordae trajectories with respect to different ventricular access sites. (A) Epicardial LV entry (dots) with trajectory lines identify anterior access (corresponding at 5th intercostal space, yellow), anteroseptal access (corresponding to the 6th intercostal space, red), posterolateral access (corresponding to the 5th intercostal space, blue), and lateral access (corresponding to the 4th intercostal space, green). (B) Intraventricular continuation of the trajectory lines with the apical myocardium removed shows their convergence on the central MV plane coaptation line. Each entry site is discussed separately in Figure 2. (C) Surgical view of mid-ventricular and apical portions of the LV. Respective dots identify endocardial position of each entry site relative to the papillary muscles. ...
Significantly, papillary muscles contract before contraction of the right ventricular in order to tighten the tendinous chords. As such, the tricuspid valve closes by drawing the cusps together before ventricular contraction and blood is prevented from regurgitation to the right atrium ...
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Definition: Rhabdolaiminae. Cuticle with fine transverse striae. Lateral fields absent. Amphids small and rather inconspicuous. Head flatly rounded, very lightly offset, without lips, papillae or setae. Stoma simple, furnished with 3 minute denticles in the anterior part and followed by a long, tapering tube lined by 3 rod-like thickenings and surrounded by a forward extension of the oesophagus. Latter almost cylindrical but narrowing to a short isthmus and swelling out into a terminal, pyriform, muscular bulb containing a valve apparatus. Tail in both sexes long and tapering, ending in a long terminal duct through which the caudal glands open. Vulva nearly equatorial, gonads paired and opposed. Spicules stout and rather broad anteriorly. Gubenaculum absent or represented by 2 local thickenings in the floor of the cloaca. No papillae in caudal region of either sex. Males are rare. Type species: Rhabdolaimus terrestris de Man, 1880 Species found: at: ...
Mutation by Beck Chords Different Versions Chords, Tab, Tabs. Key Variations. Play Advices. Chords Diagrams. Guitar Tabs Universe
The Bitter End by Placebo Tab Different Versions Chords, Tab, Tabs. Key Variations. Play Advices. Chords Diagrams. Guitar Tabs Universe
This is the leaflets that we were handing out at the march (and at the conference as well, actually). We had 10k :lol: (front) (back) Ill put a link to t...
Here you will find some helpful information for patients and carers. This information is for guidance purposes only and does not replace professional clinical…
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Among 61 heart specimens of tetralogy of Fallot with or without pulmonary atresia, four presented with an accessory tricuspid valve leaflet. This structure caused partial or almost complete obstruction of the ventricular septal defect. Depending on the morphology, the accessory tissue was classified into "mobile" or "fixed" types. The "mobile" variety was tethered by long chordae tendineae which permitted a wide excursion of the leaflet through the ventricular septal defect into the left ventricular outflow tract where it represented a potential cause of obstruction. The "fixed" variety was attached to the edges of the defect by short chordae which reduced considerably its movements. This type created a fixed obstruction of the ventricular septal defect without involving the subaortic left ventricular outflow tract. The precise morphology of the accessory tricuspid valve tissue is of considerable surgical significance. When mobile, the tissue must be resected at the time of surgical repair. When ...
A 48-year-old man with a medical history of hypertension was admitted with acute dyspnea and pyrexia. Echocardiographic examination revealed a dilated and volume-overloaded left ventricle and severe mitral regurgitation due to ruptured chordae tendinae resulting in posterior leaflet prolapse. Blood cultures were negative. The patient was treated with antibiotics considering that he had a chest infection based on the admission chest x-ray, diuretics, and angiotensin converting enzyme inhibitors, and his clinical condition improved. Subsequently, he was referred for cardiac surgery. Coronary angiography demonstrated normal coronary anatomy, and he had mitral valve repair with placement of a 27-mm Duran flexible mitral ring. Postoperatively, he developed pyrexia. Numerous blood cultures were negative, but on the 14th postoperative day serological tests came back positive for Coxiella burnetti. He was treated with the combination of doxycycline and chloroquine. On the 25th postoperative day, he ...
Different influences of left ventricular (LV) remodeling on anterior and posterior mitral leaflet (AML and PML) tethering in ischemic mitral regurgitation (MR) has not been fully investigated. We hypothesized that progressive outward displacement
BACKGROUND Despite an incomplete knowledge of the geometry and dynamics of the mitral annulus (MA), papillary muscle (PM), and the chordae tendineac, chordal-sparing MVR is popular. METHODS AND RESULTS The systolic reduction in three-dimensional distance between each PM tip and eight MA sites (DT-A) was measured in nine normal closed-chest dogs by use of surgically implanted radiopaque markers. Three loci (tip, junction, and base) on each PM were also projected onto the MA plane at end diastole and end systole to assess PM dynamics. The anterior PM tip showed significant shortening of DT-A toward the opposite side of the MA or the midanterior MA region (P | .005 or P | .05, respectively, versus same MA side [MANOVA]); conversely, the posterior PM tip DT-A shortened toward the opposite side of the MA near the anterior commissure or the area between the anterior commissure and midposterior MA (P | .005 versus same MA side). Annular projection revealed three-dimensional motion (relative to the MA) of the
This is the most frequent form of valvular disease of the heart and is due to a shortening or thickening of the valves or to some adhesion which does not permit the valve to close properly and the blood consequently regu.
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This is quite easy - lets keep to C major for our examples. Then you use the roman numerals for 1,2, 3 etc for the chords on C, D, E etc, as I, II, III etc. Now there is a subtlety here because, if you keep all the notes within the diatonic scale, some chords such as C E G are major, and others such as D F A are minor. The convention is to show the major chords in upper case and the minor chords in lower case. So the sequence is I, ii, iii, IV, V, vi Here, I have left out vii as it needs further discussion. The triad in this position in the diatonic scale has a diminished fifth rather than a perfect fifth. In C major its fifth is B to F. The diminished fifth, or tritone, is three whole tones in size and exactly splits the octave in two. Its not a particularly concordant interval and has a strong feeling that it needs to be resolved. In the classical notation vii simply plays a diminished fifth, though often notated as viio to indicate that it is diminished. In the popular notation however, vii ...
Choose and determine which version of Kawakita Saruin chords and tabs by Maximum The Hormone you can play. Last updated on 09.12.2011
Choose and determine which version of Tsume Tsume Tsume chords and tabs by Maximum The Hormone you can play. Last updated on 09.04.2014
The control of the piece progression through MIDI is done through the expectation of chains of cues that dont need to be immediatly following each other. In the case of chords, only one cue per chord is used since we dont know in what order the MIDI messages of the chord notes will arrive to the computer. As soon as the cues have been received, an (audio) event is triggered by the Chuck program and the next cue sequence is loaded. A by-pass message (MIDI NoteOn 119 - a B flat) is implemented to force the playing of the event and the transition to the next sequence. This feature was made for demonstration purposes and wasnt used in the concert setup. ...
The control of the piece progression through MIDI is done through the expectation of chains of cues that dont need to be immediatly following each other. In the case of chords, only one cue per chord is used since we dont know in what order the MIDI messages of the chord notes will arrive to the computer. As soon as the cues have been received, an (audio) event is triggered by the Chuck program and the next cue sequence is loaded. A by-pass message (MIDI NoteOn 119 - a B flat) is implemented to force the playing of the event and the transition to the next sequence. This feature was made for demonstration purposes and wasnt used in the concert setup. ...
All free hd desktop wallpapers and backgrounds with grass, nature, macro, leaflet, blurring, paysage, paysages. Image id 577110.
tabbed by: Scott Guldenzoph [email protected] Spleen by Staind tuning (C,A,D,G) intro (riff 1) C|-3-2-1-2--3-2-1-2--3-2-1-2--3-2-0-1-2- riff 2 C|-3-2-1-2 repeated riff 3 C|-1-0-1-0-5 ri
Systolic Murmurs - Mitral Valve Prolapse. You are listening to a typical example of the murmur caused by mitral valve prolapse. The pathophysiology of mitral valve prolapse is varied, but can be thought of as an inability of the papillary muscles or chordae tendineae to completely tether the mitral valve during the late stages of systole. As the left ventricle chamber decreases in size, the papillary muscles and/or the chordae fail to maintain tension on the mitral valve, and it prolapses with a brief regurgitant period into the left atrium. This is a common syndrome which frequently is associated with young adult women, and can present as attacks of palpitations, anxiety, or light-headedness. Although it is usually a mild symptom, patients with mitral valve prolapse with evidence of regurgitation by echo should be given antibiotic prophylaxis during invasive procedures to help prevent bacterial endocarditis.. The murmur of mitral valve prolapse is somewhat complex. Following a normal S1 and ...
Your blood is supposed to follow a one-way path through your heart. It flows in through the top chamber (the left atrium), down to the bottom chamber (the left ventricle), and then out to your body. Your mitral valve separates these two chambers and keeps the blood from flowing backward. In mitral valve regurgitation, your mitral valve does not work as it should and allows blood to flow backward into your upper heart chamber.. Mitral valve regurgitation can happen suddenly (acute) or, more commonly, gradually over time (chronic). Acute mitral valve regurgitation is often caused by damage to the heart, perhaps from a heart attack or a heart infection called endocarditis. There are many possible reasons you can develop chronic mitral valve regurgitation, including mitral valve prolapse, rheumatic heart disease and untreated high blood pressure. If you have mitral valve regurgitation, you may notice that you feel very tired and that you have a hard time catching your breath when you exercise or ...
Our study shows that: 1) the mitral leaflet coaptation decreased proportionally in patients with FMR related to the bilateral PM displacement, despite increased total leaflet area to compensate for the increased mitral annular area and mitral leaflet tethering; 2) annular area was significantly smaller and leaflet-to-annular area ratio was significantly larger in patients with global LV remodeling who have nonsignificant FMR compared with the patients with significant FMR; and 3) the indexes of coaptation were related to MR severity.. FMR is produced by a complex combination of pathophysiological processes where distorted and spherical LV geometry leads to tethering of the chordae and therefore incomplete leaflet coaptation (8,10,21). In this condition, patients with mitral leaflet tethering have been shown to have larger mitral leaflet area than the control subjects (10). Similarly, Dal-Bianco et al. (22) demonstrated that mechanical stresses imposed by PM tethering increased MV leaflet area ...
Normal mitral valve function depends upon the maintenance of the proper spatial relationships between the papillary muscles, the chordae tendinae, and the mitral valve leaflets throughout the cardiac cycle. Papillary muscle dysfunction may occur as a result of (1) ischemia or infarction of a papillary muscle, (2) ventricular dilatation (including aneurysm), (3) rupture of a papillary muscle, (4) inflammatory disease of a papillary muscle, and (5) interventricular conduction disturbances.. Papillary muscle dysfunction results in mitral regurgitation and an apical systolic murmur. The characteristics of the murmur vary depending upon the etiology of the papillary muscle dysfunction. In the case of ...
Rheumatic heart disease is a sequela of pharyngeal streptococcal A infection, caused by a type II hypersensitivity cross-reactions between the M protein of streptococcus A and antigens on joint and heart tissue. Most often it causes mitral stenosis due to sterile vegetations, but long term it may result in damage to the mitral valve causing MVR. In MVR, blood flows from the left ventricle into the left atrium, and as a result, the left atrium begins to dilate. Left atrial dilation can further lead to a pressure increase in the pulmonary veins and capillaries and eventually cause pulmonary edema. While rheumatic fever is a common cause of mitral regurgitation in underdeveloped countries, damage to the chordae tendinae that occurs in patients with myocardial infarction, endocarditis, connective tissue disorders, and general wear and tear on the valve that occurs with aging may all cause MVR. The severity of the valvular disorder is best measured using echocardiography ...
Ischemic mitral regurgitation (IMR) is associated with decreased quality of life and long-term survival. Although extensive mechanistic research has been conducted, the optimal management of IMR remains elusive. Clinical studies in the past often included MR of multiple etiologies, including degenerative or nonischemic origin and IMR grouped into the same category, leading to confusion and incorrect conclusions regarding the natural history and true long-term impact of IMR. It is important to distinguish IMR from mitral regurgitation resulting from nonischemic etiologies. Mitral regurgitation is often associated with coronary artery disease without a direct cause-and-effect relationship. Given the prevalence of coronary artery disease, the association of myocardial infarction and nonischemic mitral regurgitation is a common clinical association. IMR must be distinguished from mitral insufficiency caused by degenerative, rheumatic, congenital, and infectious etiologies, as well as that arising ...
The present study shows that mitral deformation in patients with systolic dysfunction provides reliable suggestion of valves subject to functional regurgitation, with a graded relationship between valve deformation indices and FMR severity. In early experimental studies, FMR has been attributed to global LV dilatation or sphericity. Later, animal studies have suggested complex alterations of spatial relationship between left ventricle and mitral apparatus to induce functional MR [8, 15]. In patients with LV dysfunction and dilation, the leaflets are usually tethered by outward displacement of the left ventricular wall and papillary muscles [4, 8].. The papillary muscles which are normally parallel to the LV long axis, displaced as a result of ischemia or heart failure, drawing the leaflets into the ventricle and restricting their motion toward closure [2, 8]. In the present study, tenting distance of mitral valve was the strongest independent determinant of functional mitral regurgitation ...
Fatigue & Heart Disease & Thickening of the Mitral Valve Leaflets Symptom Checker: Possible causes include Mitral Valve Prolapse. Check the full list of possible causes and conditions now! Talk to our Chatbot to narrow down your search.
Palpitations & Stroke & Thickening of the Mitral Valve Leaflets Symptom Checker: Possible causes include Mitral Valve Prolapse. Check the full list of possible causes and conditions now! Talk to our Chatbot to narrow down your search.
A method and device (157) for reducing mitral regurgitation. An elongated body is positioned in a coronary sinus of a patient in a vicinity of a heart mitral valve posterior leaflet (39). The body is adapted to straighten a natural curvature of at least a portion of the coronary sinus in the vicinity of the posterior leaflet to move a posterior annulus (33) anteriorly, which in turn moves the posterior leaflet (39) anteriorly, thereby to improve leaflet coaptation.
The mitral valve apparatus is a complex and refined mechanism located between the left atrium and the left ventricle of the heart which can manifest various kinds of pathologies.. In order to support identification of potentially critical conditions resulting from some typical cardiosurgery operations, it is important to develop models of the mitral valve that enable prediction of both stress in the leaflets and blood flow pressure gradient and velocity across the valve during the cardiac cycle.. In this paper a modeling approach considering fluid-structure interaction using COMSOL Multiphysics is described. The Multiphysics approach has been found to be useful in evaluating the most important surgical parameters: pressure gradient between left atrium and ventricle during diastolic phase, and maximum fluid velocity and stresses in the valve leaflet.. ...
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BACKGROUND AND AIM OF THE STUDY: Leaflet curvature is a primary determinant of leaflet stress, but no quantitative in-vivo leaflet curvature data exist. Chronic ischemic mitral regurgitation (CIMR) is associated with remodeling of the valvular-ventri
In patients with organic MR in which the regurgitation is due to a structural abnormality of the valve leaflets or chordae (e.g. mitral valve prolapse) repair of the valve is superior to replacement. However, the optimal surgical technique in ischaemic MR is not well-defined. A randomised controlled trial assigned 251 patients with severe ischemic mitral regurgitation to undergo either mitral-valve repair or chordal-sparing replacement4. The primary end-point was the imaging parameter of LV end-systolic volume index (LVESVI) at 12 months. (A primary end-point of survival would have required the enrolment of thousands of patients). The two groups had similar LVESVI, LV ejection fraction, death rate, functional status and adverse cardiac / cerebrovascular events at 12 months. However, the rate of recurrence of moderate or severe MR was higher in the repair group than in the replacement group (32.6% vs. 2.3%, P,0.001). The authors concluded that there was no significant difference in LV reverse ...
Also called floppy mitral valve. In this condition the valve is slightly deformed and bulges back into the left atrium when the ventricle contracts.
Clinical studies suggest that chorda-sparing mitral valve replacement techniques are associated with superior postoperative outcome, and several animal experiments have shown that disruption of the mitral subvalvular apparatus is followed by deterioration of left ventricular systolic function. One essential element, however, underlying the importance of chordal integrity for left ventricular function remains unproved: All investigators heretofore have been unable to demonstrate that left ventricular systolic performance can be restored by chordal reattachment after disruption of annular-papillary continuity. Therefore, we studied the effects of chordal detachment and subsequent chordal reattachment on left ventricular systolic performance using an in situ, isovolumic heart preparation in 10 halothane-anesthetized swine. The slope and left ventricular volume intercept of the isovolumic peak pressure-volume relationship were measured to assess global left ventricular systolic performance ...
Dr. Smithpresented a case of acute severe mitral regurgitation due topapillary muscle rupture. I thought it was worth posting here because there were a lot of pearls. The patient presented in extremis with no immediately apparent reason why, but after adding up the ancillary clues it could hardly be anything else. Also, a repeat 12 lead ECG done minutes later clarified some aspects of what was going on, a great illustration of the Corey Slovis rule "One ECG begets another." ...
Sometimes in the heart blood flows back in to the left atrium because the valve doesnt work properly which is called mitral regurgitation.
2016 (English)In: International Journal of Cardiology, ISSN 0167-5273, E-ISSN 1874-1754, Vol. 204, 86-87 p.Article in journal, Letter (Refereed) Published ...
Fluid-Structure Interactions in Low-Reynolds-Number Flows (RSC Soft Matter Series, Book 4) by Camille Duprat and Howard A Stone English | 2015 | ISBN: 1849738130 | 483 pages | PDF | 160 MB
Penn Medicine is a leading center for the most challenging heart valve cases, offering a variety of approaches not commonly available at other medical centers.
Definition of flail in the Definitions.net dictionary. Meaning of flail. What does flail mean? Information and translations of flail in the most comprehensive dictionary definitions resource on the web.
Last week, we covered the basic anatomy of the mitral apparatus. We reviewed in detail, the various structures and their function. As we continue with our mitral regurgitation blog series, we want to touch next on, specific imaging windows to evaluate the mitral valve. Remember, when we examine ...
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alright, so i would like a tab or chord chart of the song linked below. if you can get the key, that would be ok too, but the others are preferred, sp...
Chord finder, including split chords and chord variations. Also features standard and exotic guitar scales for lefthanded guitar.
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Looking for online definition of Mitral valve leaflets in the Medical Dictionary? Mitral valve leaflets explanation free. What is Mitral valve leaflets? Meaning of Mitral valve leaflets medical term. What does Mitral valve leaflets mean?
There are many changes that can occur to the valves of the heart. The chordae tendinae or papillary muscles can stretch or tear; the annulus of the valve can dilate (become wide); or the valve leaflets can become fibrotic (stiff) and calcified.. Mitral valve prolapse (MVP) is a very common condition, affecting 1 to 2 percent of the population. MVP causes the leaflets of the mitral valve to flop back into the left atrium during the hearts contraction. MVP also causes the tissues of the valve to become abnormal and stretchy, causing the valve to leak. The condition rarely causes symptoms and usually doesnt require treatment.. Other causes of valve disease include: coronary artery disease, heart attack, cardiomyopathy (heart muscle disease), syphilis (a sexually transmitted disease), high blood pressure, aortic aneurysms, and connective tissue diseases. Less common causes of valve disease include tumors, some types of drugs, and radiation.. ...
The Mitral Valve Repair Reference Center at Mount Sinai now offers patients the highest percentages of mitral valve repair anywhere in the world., Patients with mitral regurgitation due to fibroelastic deficiency have a lack of connective tissue as the pathological mechanism that triggers leaflet and chordal thinning and eventual chordal rupture.
... (also known as systolic click murmur syndrome, billowing mitral leaflet or floppy mitral valve syndrome) is the valvular heart disease characterized by the abnormal displacement of thickened mitral valve leaflet into the left atrium during systole, and it is the primary form of the myxomatous degeneration of the valve. This is the forum for discussing anything related to this health condition
I recently was told I had a heart murmur-possibly two; mitral valve and I think aortic valve. My Echocardiogram results show: the aortic valve leaflets are mildly thickened; the mitral valve leaflet...
TY - JOUR. T1 - The impact of intraoperative residual mild regurgitation after repair of degenerative mitral regurgitation. AU - Imielski, Bartlomiej. AU - Malaisrie, S. Chris. AU - Pham, Duc Thinh. AU - Kruse, Jane. AU - Andrei, Adin Cristian. AU - Liu, Menghan. AU - Cox, James L.. AU - McCarthy, Patrick M.. PY - 2019/1/1. Y1 - 2019/1/1. N2 - Objectives: During degenerative mitral repair, surgeons must decide if further repair is warranted for residual mild mitral regurgitation. We examined the incidence of mild mitral regurgitation, late echocardiographic and clinical outcomes, and influence of surgical experience in decision making. Methods: From April 2004 to June 2018, 1155 of 1195 patients with pure degenerative disease underwent repair (97% repair rate). Propensity score matching was performed between patients with trace/no mitral regurgitation and patients with mild residual mitral regurgitation. Late echocardiographic outcome and freedom from reoperation were compared using ...
The most complete and elaborate follow-up for mitral repair in contemporary literature is probably the series of Flameng and associates4 who report a series of 242 consecutive mitral repairs with serial follow-up echocardiography done at 6 month intervals. They found a freedom from moderate or severe mitral regurgitation of 71% at 7 years and found that new recurrent mitral regurgitation appeared at a rate of 3.7% per year (Figure 2). The data of Flameng and colleagues4 suggest that durability of many mitral repairs is limited; the linear recurrence rate implies that recurrent mitral regurgitation is likely a reflection of progression of underlying valve disease. This hypothesis is supported by data from mitral re-operations after previous repair, as the previous repairs are found to be intact in two-thirds of patients, with recurrent regurgitation usually due to new valve lesions (chordal rupture, fibrosis, calcification, leaflet perforation)5. Technical failure can be a major cause of ...
A method and apparatus for reducing mitral regurgitation. The apparatus is inserted into the coronary sinus of a patient in the vicinity of the posterior leaflet of the mitral valve, the apparatus being adapted to straighten the natural curvature of at least a portion of the coronary sinus in the vicinity of the posterior leaflet of the mitral valve, whereby to move the posterior annulus anteriorly and thereby improve leaflet coaptation and reduce mitral regurgitation.
How Is Mitral Valve Regurgitation Diagnosed? - The signs doctors might see include elevated pressure in neck veins and sound in the base of the lungs, says Nayab...
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Beltway Bandits is a really old one. The rhythm is a round, the parts are staggered. Theyre staggered so they interlock with each other. A simple rhythm becomes more complex, times four, when you copy the same part and stagger it a certain number of beats. The harmony thats used is all derived from this book called The Chord Bible. Every composer has notes, chords and rhythms that he likes to hear. Some people keep it all in their head and some people will jot down little sketches. Several years ago I made a classification of all of my favorite chords plus the order in which I preferred to hear the pitches in the chords arpeggiated. Its all broken down from three-note, four-note, five-note, six-note, eight-note chords. The chords are in different classifications, starting with those chords that have a minor second as the uppermost interval, major second, minor third, blah blah blah blah blah, all the way down to the fewest chords that have the minor ninth as the upper interval of the chord. ...
Hi, I have been to the doctor twice in the last week for extreme fatigue, dizziness, lightheaded, short of breath, pressure in chest. especially worse at night/ when laying down. however the fatigue is...
468 ] FLAIL (from Lat. flagellum, a whip or scourge, but used in the Vulgate in the sense of "flail"; the word appears in Dutch vlegel, Ger. Flegel, and Fr. fléau), a farm hand-implement formerly used for threshing corn. It consists of a short, thick club called a "swingle" or "swipple" attached by a rope or leather thong to a wooden handle in such a manner as to enable it to swing freely. The "flail" was a weapon used for military purposes in the middle ages. It was made in the same way as a threshing-flail but much stronger and furnished with iron spikes. It also took the form of a chain with a spiked iron ball at one end swinging free on a wooden or iron handle. This weapon was known as the "morning star" or "holy water sprinkler." During the panic over the Popish plot in England from 1678 to 1681, clubs, known as "Protestant flails," were carried by alarmed Protestants (see Green Ribbon Club).. ...
A device for treatment of mitral annulus dilatation comprises an elongate body having two states. In a first of these states the elongate body is insertable into the coronary sinus and has a shape adapting to the shape of the coronary sinus. 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.
Right ventricle (RV) extends from RA - Crescent shape cavity, right atrioventricular orifice. right oval opening between RA and RVsurround by fibrous rings to which 3 cusps of tricuspid valve. Atrial surface - smooth. Ventricular surface - rough. Left Ventricle - thick wall, circular loral cavity. left atrioventricular, guarded by mitral valvue. mitral value is biscuspid, cusps anchored to papillary muscles by chorae tendinae and prevent regurtitation of blood back into LV. ...
Define chord organ. chord organ synonyms, chord organ pronunciation, chord organ translation, English dictionary definition of chord organ. n. Music An electronic or reed organ equipped with buttons for producing chords
Dear Sir,I am 25 year old. I have a problem that my anterior mitral leaflet is elongated,bulky,redundant & mild prolapse. I have trivial mitral regurgitation also.have i a major problem.plz tell me that when i shall in 55 year old then valve will be prolapse compare today ...
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lamotrigine). This product is available as the above name but will be referred to as Lamictal throughout the following leaflet. Please note that the leaflet also contains information about other strengths (Lamictal 25mg, 50mg and 100mg Tablets).. Read all of this leaflet carefully before you start taking this medicine because it contains important information for you.. Keep this leaflet. You may need to read it again.. If you have any further questions, ask your doctor or pharmacist.. This medicine has been prescribed for you only. Do not pass it on to others. It may harm them, even if their signs of illness are the same as yours.. If you get any of the side effects, talk to your doctor or pharmacist. This includes any possible side effects not listed in this leaflet. See section 4.. What is in this leaflet. 1. What Lamictal is and what it is used for. 2. What you need to know before you take Lamictal. 3. How to take Lamictal. 4. Possible side effects. 5. How to store Lamictal. 6. Contents of ...
Download and Print For What Its Worth sheet music for guitar (chords) by Placebo. Guitar chords only, lyrics and melody may be included. High Quality.
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Fluid-structure interactions (FSI), i.e., the interplay of some moveable or deformable structure with an internal or surrounding fluid, are among the most widespread and most challenging coupled or mu
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Poncelet, Alain. Recurrence of mitral valve regurgitation after mitral valve repair in degenerative valve disease.. In: Circulation, Vol. 108, no.17, p. 125e-125 (2003 ...
TY - JOUR. T1 - Papillary muscle relocation and mitral annuloplasty in ischemic mitral valve regurgitation: Midterm results. AU - Fattouch, Khalil. AU - Guccione, Francesco. AU - Dioguardi, Pietro. AU - Castrovinci, Sebastiano. AU - Murana, Giacomo. AU - Nasso, Giuseppe. AU - Fattouch, Khalil. AU - Speziale, Giuseppe. AU - Guccione, Francesco. AU - Dioguardi, Pietro. PY - 2014. Y1 - 2014. N2 - Objectives The surgical approach for ischemic mitral regurgitation remains unclear. Many studies are in favor of adding the subvalvular procedure to mitral annuloplasty to reduce recurrent mitral regurgitation. This study reports the clinical and echocardiographic outcomes of papillary muscle relocation combined with mitral annuloplasty.Methods From 2003, 115 patients with severe ischemic mitral regurgitation who underwent papillary muscle relocation plus nonrestrictive mitral annuloplasty and coronary artery bypass grafting were retrospective analyzed. Patients mean age was 52 ± 12.8 years, New York ...
A 78-year-old woman who had undergone an axillobifemoral artery bypass with a prosthetic graft for Leriche syndrome presented 1 month later with cough and fever. A clinical examination revealed obvious redness in the right groin. Routine laboratory tests uncovered inflammation and methicillin-sensitive-Staphylococcus aureus was cultured from blood samples. Mitral valve vegetations were identified by echocardiography, and after a diagnosis of infective endocarditis, specific intravenous antibiotics were immediately administered. One month later, CT revealed a large pseudoaneurysm of the posterior left ventricular wall that had not been present at the time of admission. Transesophageal echocardiography and magnetic resonance imaging showed an aneurysmal cavity arising from the wall just below the posterior mitral valve leaflet. The patient agreed to undergo cardiac surgery due to the high likelihood that the pseudoaneurysm would rupture. The mitral annulus and leaflet were normal at surgery. We ...
The outcome in functional mitral regurgitation patients after aortic valve replacement is unclear. Although uncommon in other circumstances, in this patient, the constellation of dilated ventricular cavity and left ventricular dysfunction caused by aortic valve replacement resulted in hemodynamically significant functional mitral regurgitation upon weaning from cardiopulmonary bypass.. Successful weaning from cardiopulmonary bypass required direct surgical treatment to eliminate severe functional mitral regurgitation. We were reluctant to perform mitral valve replacement or repair due to the unstable clinical condition of the patient.. The Alfieri edge-to-edge stitch technique is a rapid and effective way of mitral valve repair and is associated with satisfactory clinical outcomes in several diseases. Placement of a central Alfieri edge-to-edge stitch eliminated severe functional mitral valve regurgitation and restored hemodynamic stability with a functional rather than an anatomical repair. The ...
Devices and methods are provided for diagnosing and repairing mitral valve defects such as mitral valve regurgitation. According to an exemplary method, mitral valve function is visualized by transesophageal echocardiography. A catheter is inserted along the venous system of the patient through the atrium into the mitral valve. A suction tip grasps the leaflets of the mitral valve to immobilize and juxtapose the leaflets at a point simulating a stitch, and the mitral valve is again observed to confirm that fastening at that point will repair the prolapse or other defect. The mitral valve leaflets are then via a fastening such as a staple or shape memory rivet. The fastener may be inserted by a stapling assembly in the venous catheter tip, or by a separate stapler that is inserted along an arterial path from the opposite direction and guided along a transcardiac rail to the immobilized point. Upon completion of the repair process, the mitral valve is once again visualized by transesophageal

Cardiovascular Magnetic Resonance Characterization of Mitral Valve Prolapse | JACC: Cardiovascular ImagingCardiovascular Magnetic Resonance Characterization of Mitral Valve Prolapse | JACC: Cardiovascular Imaging

Signal enhancement usually is present at the papillary muscle tips adjacent to the attachment of the chordae tendineae. The LGE ... and in some cases ruptured chordae tendineae (16). These characteristics of the mitral valve leaflets would be important to ...
more infohttp://imaging.onlinejacc.org/content/1/3/294

The Auscultation Assistant - Mitral Valve ProlapseThe Auscultation Assistant - Mitral Valve Prolapse

... but can be thought of as an inability of the papillary muscles or chordae tendineae to completely tether the mitral valve ... As the left ventricle chamber decreases in size, the papillary muscles and/or the chordae fail to maintain tension on the ... help to maintain tension along the chordae and to keep the valve shut. The only other murmur which, for similar reasons, ...
more infohttps://www.wilkes.med.ucla.edu/MVPmain.html

Chordae Tendineae - HeartChordae Tendineae - Heart

The chordae tendineae are a group of tough, tendinous strands in the heart. They are commonly referred to as the "heart strings ... The chordae tendineae are a group of string-like tendinous bands found within both ventricles of the heart. They arise from the ... Functionally, the chordae tendineae play a vital role in holding the atrioventricular valves in place while the heart is ... Histologically, the chordae tendineae resemble thin tendons made of dense regular connective tissue. Most of their mass is made ...
more infohttps://www.innerbody.com/image_card02/musc31-new.html

Chordae tendineae - WikipediaChordae tendineae - Wikipedia

Papillary muscles and chordae tendineae Play media Ultrasound showing redundant chordae tendineae Cardiac cycle Karas, S.; ... Chordae tendineae are relaxed because the atrioventricular valves are forced open. When the ventricles of the heart contract in ... The chordae tendineae prevent the eversion, prolapse, by becoming tense thus pulling the flaps, holding them in closed position ... The chordae tendineae (tendinous chords), colloquially known as the heart strings, are cord-like tendons that connect the ...
more infohttps://en.wikipedia.org/wiki/Chordae_tendineae

Study of the traction resistance of mitral valve chordae tendineaeStudy of the traction resistance of mitral valve chordae tendineae

... chordae tendineae when submitted to traction. The importance of keeping the integrity of papillary muscle, chordae tendineae, ... at the point at which the chordae tendineae were considered ruptured; consequently 103 chordae tendineae were included in the ... and discuss the preservation or not of chordae tendineae in each condition affecting the chordae tendineae. ... thickness of the primary chordae tendineae, but not with the length of the chordae tendineae. ...
more infohttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S1807-59322006000500005&lng=en&nrm=iso

The prevalence of ruptured chordae tendineae in the mitral valve prolapse syndrome - Download PDFThe prevalence of ruptured chordae tendineae in the mitral valve prolapse syndrome - Download PDF

The prevalence of ruptured chordae tendineae in the mitral valve prolapse syndrome ... Mitral valve prolapse and ruptured chordae tendineae. To determine the causes of ruptured chordae tendineae and a suspected ... due to ruptured chordae tendineae of posterior leaflet underwent mitral valve repair by replacement of chordae tendineae with ... Download PDF Full Text: The prevalence of ruptured chordae tendineae in the mitral valve prolapse syndrome. ...
more infohttps://eurekamag.com/research/006/740/006740498.php

Mechanical Properties Of Chordae Tendineae And Anterior Leaflets From  by Koon Ong Lim"Mechanical Properties Of Chordae Tendineae And Anterior Leaflets From " by Koon Ong Lim

Mechanical Properties Of Chordae Tendineae And Anterior Leaflets From Human Mitral Valves, And Of Aortic Valve Cusps ... Lim, Koon Ong, "Mechanical Properties Of Chordae Tendineae And Anterior Leaflets From Human Mitral Valves, And Of Aortic Valve ...
more infohttps://ir.lib.uwo.ca/digitizedtheses/890/

Spontaneous chordae tendineae rupture during peripartum, The American Journal of Emergency Medicine | 10.1016/j.ajem.2018.03...Spontaneous chordae tendineae rupture during peripartum, The American Journal of Emergency Medicine | 10.1016/j.ajem.2018.03...

"Spontaneous chordae tendineae rupture during peripartum, The American Journal of Emergency Medicine" on DeepDyve, the largest ... Spontaneous chordae tendineae rupture during peripartum. Spontaneous chordae tendineae rupture during peripartum Chiu, Feng-Han ... Spontaneous chordae tendineae rupture during peripartum. Chiu, Feng-Han; Yang, Chih-Jen; Huang, Chih-Kang; Lin, Chih-Yuan; Tsai ... Case report: acute chordae tendineae rupture and mitral regurgitation in pregnancy. Sachin, A.; Arundhati, D.; Chandrakant, C. ...
more infohttps://www.deepdyve.com/lp/elsevier/spontaneous-chordae-tendineae-rupture-during-peripartum-axrpecHR5o

Pulmonary Artery Catheter Passing between the Chordae Tendineae of the Tricuspid Valve | Anesthesiology | ASA PublicationsPulmonary Artery Catheter Passing between the Chordae Tendineae of the Tricuspid Valve | Anesthesiology | ASA Publications

When the surgery began and the right atrium was opened, the PAC was found to be passing between the chordae tendineae of the ... 1-2Although we have not experienced such a complication, the passage of a PAC through the chordae tendineae of the tricuspid ... Pulmonary Artery Catheter Passing between the Chordae Tendineae of the Tricuspid Valve. Anesthesiology 11 1995, Vol.83, 1130- ... Motoshi Kainuma, Morimasa Yamada, Toshiyuki Miyake; Pulmonary Artery Catheter Passing between the Chordae Tendineae of the ...
more infohttp://anesthesiology.pubs.asahq.org/article.aspx?articleid=2323532

Effect of glutaraldehyde based cross-linking on the viscoelasticity of mitral valve basal chordae tendineae | Springer for...Effect of glutaraldehyde based cross-linking on the viscoelasticity of mitral valve basal chordae tendineae | Springer for...

... two papillary muscles and chordae tendineae [4, 6, 7, 8]. Chordae connect the papillary muscles to the anterior and posterior ... The role of chordae tendineae in mitral valve competence. J Heart Valve Dis. 2005;14:603-9.Google Scholar ... I. Chordae tendineae: a new classification. Circulation. 1970;41:449-58.CrossRefGoogle Scholar ... Structural characterization of the chordae tendineae in native porcine mitral valves. Ann Thorac Surg. 2005;80:189-97.CrossRef ...
more infohttps://rd.springer.com/article/10.1186%2Fs12938-018-0524-2

Total relief of severe left ventricular outflow obstruction after spontaneous rupture of chordae tendineae in a patient with...Total relief of severe left ventricular outflow obstruction after spontaneous rupture of chordae tendineae in a patient with...

Total relief of severe left ventricular outflow obstruction after spontaneous rupture of chordae tendineae in a patient with ... Total relief of severe left ventricular outflow obstruction after spontaneous rupture of chordae tendineae in a patient with ... Total relief of severe left ventricular outflow obstruction after spontaneous rupture of chordae tendineae in a patient with ...
more infohttps://heart.bmj.com/content/91/5/e35.share

False chordae tendineae | definition of false chordae tendineae by Medical dictionaryFalse chordae tendineae | definition of false chordae tendineae by Medical dictionary

What is false chordae tendineae? Meaning of false chordae tendineae medical term. What does false chordae tendineae mean? ... Looking for online definition of false chordae tendineae in the Medical Dictionary? false chordae tendineae explanation free. ... false chordae tendineae. false chordae tendineae. [TA] tendinous cords that, unlike the true chordae tendineae, do not attach ... Synonym(s): chordae tendineae falsae [TA], chordae tendineae spuriae ☆ , false tendinous cords ☆ ...
more infohttps://medical-dictionary.thefreedictionary.com/false+chordae+tendineae

Chordae TendineaeChordae Tendineae

The chordae tendineae, also called heart strings, are cord-like tendons that connect the papillary muscles to the tricuspid ... The chordae tendineae prevents the valves flaps from being everted (turned inside out) into the right atrium when the right ... Chordae tendineae are approximately 80% collagen, while the remaining 20% is made up of elastin and endothelial cells. ...
more infohttp://science-naturalphenomena.blogspot.com/2009/02/chordae-tendineae.html

Whats Chordae Tendineae and Its Connection with Mitral Valve Prolapse - Living with MVPWhat's Chordae Tendineae and Its Connection with Mitral Valve Prolapse - Living with MVP

Chordae tendineae is the string muscle in the heart that regulates the valve movements. Abnormalities in this muscle may ... Chordae tendineae inside your heart (Wikipedia). Normal chordae tendineae strings will close the flap tightly during the blood- ... Chordae tendineae is commonly known as the "heart strings" due to the shape. They connect the hearts valve with the muscles ... Chordae tendineae works like a gate, opening and closing the hearts valve during the blood circulation. This function allows ...
more infohttps://livingwithmvp.com/whats-chordae-tendineae-mitral-valve-prolapse/

DNA Repair Gene Polymorphism and the Risk of Mitral Chordae Tendineae Rupture.  - PubMed - NCBIDNA Repair Gene Polymorphism and the Risk of Mitral Chordae Tendineae Rupture. - PubMed - NCBI

DNA Repair Gene Polymorphism and the Risk of Mitral Chordae Tendineae Rupture.. Yigin AK1, Vatan MB2, Akdemir R2, Aksoy MN2, ... DNA Repair Gene Polymorphism and the Risk of Mitral Chordae Tendineae Rupture ... aim of the present study was to evaluate the significance of polymorphism Lys939Gln in XPC gene in patients with mitral chordae ...
more infohttps://phgkb.cdc.gov/PHGKB/phgHome.action?action=forward&dbsource=huge&id=121923

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| Mitral valve repair system chordae tendineae rupture NeoChord DS1000 NeoChord
 |...Health Management and Leadership Portal | Mitral valve repair system chordae tendineae rupture NeoChord DS1000 NeoChord |...

a:1:{i:0;a:2:{s:4:"name";s:8:"Options:";s:3:"val";s:25:"chordae tendineae rupture";}} ... Mitral valve repair system chordae tendineae rupture NeoChord DS1000 NeoChord NeoChord DS1000 ... The NeoChord DS1000 is a disposable device that is intended to replace damaged chordae by delivering artifical chordae tendinae ... Our Technology Historically, chordae replacement has been used with high reproducibility and excellent results for repairing ...
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Mitral valve - WikipediaMitral valve - Wikipedia

The valve leaflets are prevented from prolapsing into the left atrium by the action of chordae tendineae. The chordae tendineae ... Chordae tendineae[edit]. The left side of the heart. The mitral valve, as well as the chordae tendinae are visible as white ... resulting in an increased cuspal area and lengthening of the chordae tendineae. Elongation of the chordae tendineae often ... causes rupture, commonly to the chordae attached to the posterior cusp. Advanced lesions-also commonly involving the posterior ...
more infohttps://en.wikipedia.org/wiki/Mitral

Mitral valve finite-element modelling from ultrasound data: a pilot study for a new approach to understand mitral function and...Mitral valve finite-element modelling from ultrasound data: a pilot study for a new approach to understand mitral function and...

iii) Chordae tendineae and PMs. The last mitral structures to be considered are the chordae tendineae and PMs, which are often ... ii) Chordae tendineae. The essential framework of the chordae tendineae is constituted by a central core of crimped collagen ... Second, the modelling of the chordae tendineae needs to be improved by adding basal chordae to the model and by accounting for ... 2005), who described the chordae tendineae as inextensible, i.e. rigid.. Moreover, since the chordae are structured as strings ...
more infohttp://rsta.royalsocietypublishing.org/content/366/1879/3411

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GORE-TEX® Suture for Chordae Tendineae. Repair and replacement of chordae tendineae is a critical, exacting intracardiac ... GORE-TEX® Suture has been used successfully in chordae tendineae procedures for more than 20 years. ...
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GORE-TEX® SutureGORE-TEX® Suture

... for Chordae Tendineae. Repair and replacement of chordae tendineae is a critical, exacting intracardiac ... GORE-TEX® Suture has been used successfully in chordae tendineae procedures for more than 20 years. ...
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April 5, 2014 - Volume 127 - Issue 7 : Chinese Medical JournalApril 5, 2014 - Volume 127 - Issue 7 : Chinese Medical Journal

Acute mitral valve chordae tendineae rupture of a girl. Tong, Xiaoning; Xue, Hui; Wu, Qingyu ...
more infohttps://journals.lww.com/cmj/Pages/toc.aspx?year=2014&issue=04050
  • The chordae tendineae prevents the valves flaps from being everted (turned inside out) into the right atrium when the right ventricle of the heart contracts to pump the blood into the aorta, thus avoiding a backflow of blood into the right atrium. (blogspot.com)
  • Histologically, the chordae tendineae resemble thin tendons made of dense regular connective tissue. (innerbody.com)
  • The chordae tendineae prevent the eversion, prolapse, by becoming tense thus pulling the flaps, holding them in closed position. (wikipedia.org)
  • Despite its effect to the chordae tendineae and the heart's flaps, these signs are not always present in mitral valve prolapse. (livingwithmvp.com)
  • In this case, the thickening of a flap (or two flaps) plus the abnormalities of chordae tendineae cause the blood to rush more quickly. (livingwithmvp.com)
  • The importance of keeping the integrity of papillary muscle, chordae tendineae, and mitral valve cuspid when the replacement of this valve occurs is clear, but the knowledge of the maximum resistance that a primary tendinea chorda can withstand is not known. (scielo.br)
  • The importance of the mechanical and material properties of chordae tendineae relates to its significance in improving the surgical procedure for the correction of mitral valve regurgitation. (springer.com)
  • To determinate the extension and the resistance of the primary mitral valve chordae tendineae when submitted to traction. (scielo.br)
  • Eight hearts were dissected, and one hundred and thirty two primary human chordae tendineae were measured (length and thickness) and submitted to traction under controlled conditions so that the absolute resistance, resistance relative to thickness (relative resistance), and elongation could be measured. (scielo.br)
  • Aortic valve repair techniques included sub-commissural plasty in 138 patients, plication in 84, free-edge reinforcement in 80, resection of raphe plus re-suturing in 40 and the chordae technique in 52. (biomedsearch.com)