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Percutaneous Aortic Valve Replacement
Percutaneous aortic valve replacement (PAVR), also known as percutaneous aortic valve implantation (PAVI), transcatheter aortic valve implantation (TAVI) or transcatheter aortic valve replacement (TAVR), is the replacement of the aortic valve of the heart through the blood vessels (as opposed to valve replacement by open heart surgery, surgical aortic valve replacement, SAVR). The replacement valve is delivered via one of several access methods: transfemoral (in the upper leg), transapical (through the wall of the heart), subclavian (beneath the collar bone), direct aortic (through a minimally invasive surgical incision into the aorta), and transcaval (from a temporary hole in the aorta near the navel through a vein in the upper leg), among others. Severe symptomatic aortic stenosis carries a poor prognosis. At present there is no treatment via medication, making the timing of aortic valve replacement the most important decision to make for these patients. Until recently, surgi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Interventional Cardiology
Interventional cardiology is a branch of cardiology that deals specifically with the catheter based treatment of structural heart diseases. Andreas Gruentzig is considered the father of interventional cardiology after the development of angioplasty by interventional radiologist Charles Dotter. Many procedures can be performed on the heart by catheterization. This most commonly involves the insertion of a sheath into the femoral artery (but, in practice, any large peripheral artery or vein) and cannulating the heart under X-ray visualization (most commonly fluoroscopy). The radial artery may also be used for cannulation; this approach offers several advantages, including the accessibility of the artery in most patients, the easy control of bleeding even in anticoagulated patients, the enhancement of comfort because patients are capable of sitting up and walking immediately following the procedure, and the near absence of clinically significant sequelae in patients with a normal All ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boston Scientific
Boston Scientific Corporation ("BSC"), incorporated in Delaware, is a biomedical/biotechnology engineering firm and multinational manufacturer of medical devices used in interventional medical specialties, including interventional radiology, interventional cardiology, peripheral interventions, neuromodulation, neurovascular intervention, electrophysiology, cardiac surgery, vascular surgery, endoscopy, oncology, urology and gynecology. Boston Scientific is widely known for the development of the Taxus Stent, a drug-eluting stent which is used to open clogged arteries. With the full acquisition of Cameron Health in June 2012, the company also became notable for offering a minimally invasive implantable cardioverter-defibrillator (ICD) which they call the EMBLEM subcutaneous implantable defibrillator (S-ICD). History Boston Scientific was formed years ago, on June 29, 1979, in Watertown, Massachusetts, as a holding company for the medical products company, Medi-Tech, Inc., an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NewYork–Presbyterian
The NewYork-Presbyterian Hospital is a nonprofit academic medical center in New York City affiliated with two Ivy League medical schools, Cornell University and Columbia University. The hospital comprises seven distinct campuses located in the New York metropolitan area. The hospital's two flagship medical centers are Columbia University Irving Medical Center and Weill Cornell Medical Center. , the hospital is ranked as the seventh best hospital in the United States and the second in the New York City metropolitan area by '' U.S. News & World Report''. The hospital has more than 6,500 affiliated physicians, 20,000 employees and 2,600 beds in total. It is one of the largest hospitals in the world. NYPH annually treats about 310,000 patients in its emergency department and delivers about 15,000 babies. History NewYork-Presbyterian Hospital was founded in 1771 as New York Hospital by Edinburgh Medical School graduate Samuel Bard. It received a Royal Charter granted by King Geor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Rouen
The University of Rouen Normandy (''Université de Rouen Normandie'') is a French university, in the Academy of Rouen. History and demographics Located not in Rouen, but in the suburb of Mont-Saint-Aignan (a "township" in the Normandy region), the University of Rouen Normandy opened in 1966 as an off-shoot of the University of Caen. It is a large public university with over 25,000 students enrolled. Ranking According to U.S. News & World Report, University of Rouen Normandy made #835 (in a 3-way tie with Assiut University in Egypt and Universidad de Antioquia in Colombia) on the Best Global Universities list (published October 24, 2017) out of 1,250 universities being judged. University of Rouen Normandy was also compared to 66 other French universities and was ranked #45. These rankings are based on the reputation of the university as well as the extent and quality of the research performed at each location. Achievements *First transcatheter aortic valve implantation in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alain Cribier
Alain Cribier, FACC, FESC (born 1945) is a French interventional cardiologist, who is a Professor of Medicine and Director of Cardiology at the University of Rouen's Charles Nicolle Hospital. Alain Cribier is best known for performing the world's first transcatheter aortic valve implantation in 2002, the first mitral commissurotomy in 1995 and the first balloon aortic valvuloplasty in 1986. Education Cribier obtained his MD medical degree at the University of Paris and completed his early residency training there. Cribier began his cardiology residency at the University of Rouen in 1972 and in 1976 he spent a year in an interventional cardiology fellowship at the Cedars-Sinai Hospital in Los Angeles, California. Career In 1983, Cribier was promoted to a Professor of Medicine and the Director of the Catheterization Lab at the University of Rouen. He developed and performed the world's first balloon aortic valvuloplasty in 1986. He performed the world's first mitral commissurot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
In Vitro
''In vitro'' (meaning in glass, or ''in the glass'') studies are performed with microorganisms, cells, or biological molecules outside their normal biological context. Colloquially called "test-tube experiments", these studies in biology and its subdisciplines are traditionally done in labware such as test tubes, flasks, Petri dishes, and microtiter plates. Studies conducted using components of an organism that have been isolated from their usual biological surroundings permit a more detailed or more convenient analysis than can be done with whole organisms; however, results obtained from ''in vitro'' experiments may not fully or accurately predict the effects on a whole organism. In contrast to ''in vitro'' experiments, ''in vivo'' studies are those conducted in living organisms, including humans, and whole plants. Definition ''In vitro'' ( la, in glass; often not italicized in English usage) studies are conducted using components of an organism that have been isolated fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quantitative Research
Quantitative research is a research strategy that focuses on quantifying the collection and analysis of data. It is formed from a deductive approach where emphasis is placed on the testing of theory, shaped by empiricist and positivist philosophies. Associated with the natural, applied, formal, and social sciences this research strategy promotes the objective empirical investigation of observable phenomena to test and understand relationships. This is done through a range of quantifying methods and techniques, reflecting on its broad utilization as a research strategy across differing academic disciplines. The objective of quantitative research is to develop and employ mathematical models, theories, and hypotheses pertaining to phenomena. The process of measurement is central to quantitative research because it provides the fundamental connection between empirical observation and mathematical expression of quantitative relationships. Quantitative data is any data that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anticoagulants
Anticoagulants, commonly known as blood thinners, are chemical substances that prevent or reduce coagulation of blood, prolonging the clotting time. Some of them occur naturally in blood-eating animals such as leeches and mosquitoes, where they help keep the bite area unclotted long enough for the animal to obtain some blood. As a class of medications, anticoagulants are used in therapy for thrombotic disorders. Oral anticoagulants (OACs) are taken by many people in pill or tablet form, and various intravenous anticoagulant dosage forms are used in hospitals. Some anticoagulants are used in medical equipment, such as sample tubes, blood transfusion bags, heart–lung machines, and dialysis equipment. One of the first anticoagulants, warfarin, was initially approved as a rodenticide. Anticoagulants are closely related to antiplatelet drugs and thrombolytic drugs by manipulating the various pathways of blood coagulation. Specifically, antiplatelet drugs inhibit platelet aggre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nickel Titanium
Nickel titanium, also known as Nitinol, is a metal alloy of nickel and titanium, where the two elements are present in roughly equal atomic percentages. Different alloys are named according to the weight percentage of nickel; e.g., Nitinol 55 and Nitinol 60. It exhibits the shape memory effect and superelasticity at different temperatures. Nitinol alloys exhibit two closely related and unique properties: the shape memory effect and superelasticity (also called pseudoelasticity). Shape memory is the ability of Nitinol to undergo deformation at one temperature, stay in its deformed shape when the external force is removed, then recover its original, undeformed shape upon heating above its "transformation temperature". Superelasticity is the ability for the metal to undergo large deformations and immediately return to its undeformed shape upon removal of the external load. Nitinol can deform 10–30 times as much as ordinary metals and return to its original shape. Whether Nitinol be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catheter
In medicine, a catheter (/ˈkæθətər/) is a thin tube made from medical grade materials serving a broad range of functions. Catheters are medical devices that can be inserted in the body to treat diseases or perform a surgical procedure. Catheters are manufactured for specific applications, such as cardiovascular, urological, gastrointestinal, neurovascular and ophthalmic procedures. The process of inserting a catheter is ''catheterization''. In most uses, a catheter is a thin, flexible tube (''soft'' catheter) though catheters are available in varying levels of stiffness depending on the application. A catheter left inside the body, either temporarily or permanently, may be referred to as an "indwelling catheter" (for example, a peripherally inserted central catheter). A permanently inserted catheter may be referred to as a "permcath" (originally a trademark). Catheters can be inserted into a body cavity, duct, or vessel, brain, skin or adipose tissue. Functionally, they all ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pericardial Heart Valves
The pericardial heart valve was invented by Marian Ionescu, a British surgeon working at the General Infirmary in Leeds, England. He created this artificial bioprosthetic heart valve as a three-cusp structure made of chemically treated bovine pericardium attached to a Dacron cloth-covered titanium frame.Ionescu M I, Tandon A P, Silverton N P, et al. "Long-term durability of the pericardial valve". In: Bodnar E, Yacoub M (Eds) ''Biologic and Bioprosthetic Valves. Proceedings of the Third International Symposium''Yorke Medical Books (1986) New York, pages 165–176 The Realisation of a concept The experimental and in vitro testing of this novel device took place in 1970, and in March 1971, Ionescu began, for the first time, the implantation of the pericardial valve in all three cardiac positions in humans. Between 1971 and 1976 the valves had been made in Ionescu's own hospital laboratory. Throughout these five years of usage in 212 patients the performance of the pericardial valve w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
