Percutaneous valve procedures, which are currently approved only in Europe, are under study in the U.S. In particular, researchers are studying the safety and effectiveness of the devices being used and the techniques used to implant them, as well as the profile of patients who should receive them.
Several studies analyzing the safety and efficacy of percutaneous valve therapies will be presented at TCT 2007:
High-risk patients receive life-saving valve replacement
In a study of 85 patients at high-risk for surgery with stenotic aortic valves, scientists led by John Webb, MD, FACP(C) and Sanjeevan Pasupati, MBChB, FRACP of St. Paul's Hospital, Vancouver, BC, Canada, describe the first-in-man implantations of the transarterial Percutaneous Aortic Valve (PAV). In these patients, transarterial PAV implantation produced clinical improvements that were sustained at 1 year.
Aortic valve replacement
A team led by Susheel Kodali, MD, of Columbia University, New York, NY, reported mid-term results from the U.S. transcather aortic valve replacement experience. Between December 2005 and November 2006, 55 patients were enrolled. The team concluded that in high-surgical-risk patients, percutaneous aortic valve replacement provides sustained symptom improvement for at least 6-12 months. One-year survival (72.8%) was limited primarily by pre-existing conditions unrelated to the valve implant in this high-risk population.
Successful left ventricle remodeling with new percutaneous valve device
Mitral insufficiency (abnormal blood leakage from the left ventricle through the mitral valve into the left atrium), when severe, may lead to progressive left ventricular enlargement and heart failure. Repair of the leaking mitral valve may improve the function of the failing heart (reverse LV remodeling). A device known as the Mitra Clip was found to be effective, demonstrating significant clinical improvements in patients with mitral regurgitation who had Charlotte, NC.
In addition to these presentations, panel discussions were held on Sunday October 21, “Percutaneous Mitral Valve Repair and Replacement,” led by Ted Feldman, MD, Northwestern University, Feinberg School of Medicine. These panels discussed the various types of and approaches.
Irma Damhuis | EurekAlert!
Europe’s Demographic Future. Where the Regions Are Heading after a Decade of Crises
10.08.2017 | Berlin-Institut für Bevölkerung und Entwicklung
Scientists reveal source of human heartbeat in 3-D
07.08.2017 | University of Manchester
Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.
As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...
Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...
For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.
While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...
An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.
The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...
A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
16.08.2017 | Event News
04.08.2017 | Event News
26.07.2017 | Event News
18.08.2017 | Life Sciences
18.08.2017 | Physics and Astronomy
18.08.2017 | Materials Sciences