The aortic valve study was led by Sabine Bleiziffer, MD, consultant cardiac surgeon, German Heart Center Munich, Munich, Germany, and will be presented as a poster abstract (TCT-111) on Tuesday, September 22 between 8:00 a.m. and 10:00 a.m. in Hall D of The Moscone Center.
"Transcatheter aortic valve implantation with the self-expandable prosthesis is an effective and durable treatment for patients with aortic stenosis not eligible for surgical aortic valve replacement," said Dr. Bleiziffer.
Between June 2007 and April 2009, 179 aortic valve prostheses were implanted in non-surgical candidates via a number of different routes: transfemoral (164 patients), transapical (5 patients), subclavian artery (7 patients), and ascending aorta (3 patients). Patients were a mean age of 81 ± 7y, with a mean STS score of 19 ± 11% and symptomatic high-grade aortic stenosis (mean valve orifice area 0.7 ± 0.2cm², mean aortic gradient 48 ± 18 mm Hg).
Periprocedural complications included femoral access site complications in 13% of the patients, dialysis for postoperative renal failure in 8%, neurologic events in 7%, and permanent pacemaker implantation in 26%. 30 day-, 6 months-, and 1 year-survival was 88%, 78%, and 78%, respectively.
Freedom from bleeding events, thromboembolic events, structural valve deterioration and prosthestic endocarditis was 83%, 97%, 99% and 97% at one year. Non-structural valve deterioration or valve thrombosis did not occur. Mean aortic gradient decreased to 11 ± 4 mm Hg (valve size 26) and 12 ± 4 mm Hg (valve size 29), and valve orifice area increased to 1.4 ± 0.4cm² (valve size 26) and 1.5 ± 0.3cm² without change up to one-year follow-up.
The study concluded that multiple vascular access sites are feasible for implantation of the prosthesis because of the small diameter of the delivery sheath. Periprocedural complications are considerable but related to the high risk patient population. Mid-term valve-related complications are exceptionally low and the gradient release after prosthesis implantation is stable up to one year of follow-up.
"A close and careful follow-up of patients treated with the new technology of transcatheter valve implantation including history of valve-related complications and echocardiographic assessment is crucial to approve the quality of the technique and to redefine indications for future patients," said Dr. Bleiziffer.
About CRF and TCT
The Cardiovascular Research Foundation (CRF) is an independent, academically focused nonprofit organization dedicated to improving the survival and quality of life for people with cardiovascular disease through research and education. Since its inception in 1991, CRF has played a major role in realizing dramatic improvements in the lives of countless numbers of patients by establishing the safe use of new technologies and therapies in the subspecialty of interventional cardiology and endovascular medicine.
Transcatheter Cardiovascular Therapeutics (TCT) is the annual scientific symposium of the Cardiovascular Research Foundation. TCT gathers leading medical researchers and clinicians from around the world to present and discuss the latest developments in the field of interventional cardiology and vascular medicine.
Judy Romero | EurekAlert!
Why might reading make myopic?
18.07.2018 | Universitätsklinikum Tübingen
Unique brain 'fingerprint' can predict drug effectiveness
11.07.2018 | McGill University
For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.
To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...
For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.
Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...
Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.
A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...
Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.
"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....
Ultra-short, high-intensity X-ray flashes open the door to the foundations of chemical reactions. Free-electron lasers generate these kinds of pulses, but there is a catch: the pulses vary in duration and energy. An international research team has now presented a solution: Using a ring of 16 detectors and a circularly polarized laser beam, they can determine both factors with attosecond accuracy.
Free-electron lasers (FELs) generate extremely short and intense X-ray flashes. Researchers can use these flashes to resolve structures with diameters on the...
13.07.2018 | Event News
12.07.2018 | Event News
03.07.2018 | Event News
19.07.2018 | Earth Sciences
19.07.2018 | Power and Electrical Engineering
19.07.2018 | Materials Sciences