The study involved the review of hospital discharge data from 657,877 patients who had been admitted to U.S. hospitals for carotid endarterectomy or coronary bypass artery surgery from 1993 to 2002.
The study found a 38 percent greater chance of death or postoperative stroke among patients with combined coronary bypass artery surgery and carotid endarterectomy compared to the risk of death or stroke from coronary artery bypass surgery alone. Carotid endarterectomy is the surgical removal of harmful plaque build-up in the carotid arteries, the main suppliers of blood to the brain.
The underlying rationales for combining both procedures are to protect the carotid artery from blockage, or stroke, during the heart bypass surgery and to lessen the risk of stroke by having just one procedure.
"The benefit of this combined procedure is controversial," said study author Richard M. Dubinsky, MD, MPH, with the University of Kansas Medical Center in Kansas City, Kansas, and a Fellow of the American Academy of Neurology. "Given this significant increase in postoperative stroke and death, a randomized clinical trial of the combined surgery is needed to determine the benefit, if any, compared to performing the operations in separate hospitalizations."
Dubinsky says the increase in death or stroke could be due to the degree of narrowing of carotid arteries, the patient's history of previous stroke, or other factors that could not be identified from the data. He says those are two areas that must be matched in any future clinical trials.
In addition, Dubinsky says this is the first study to show that being female was slightly protective against postoperative death or stroke after the combined procedures.
Stroke affects more than 700,000 people in the United States each year. A blockage of a blood vessel is responsible for about 80 percent of strokes.
Angela Babb | EurekAlert!
Drone vs. truck deliveries: Which create less carbon pollution?
31.05.2017 | University of Washington
New study: How does Europe become a leading player for software and IT services?
03.04.2017 | Fraunhofer-Institut für System- und Innovationsforschung (ISI)
An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.
Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...
Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.
Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...
Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.
As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...
Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.
With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...
Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine
Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...
19.06.2017 | Event News
13.06.2017 | Event News
13.06.2017 | Event News
23.06.2017 | Information Technology
23.06.2017 | Ecology, The Environment and Conservation
22.06.2017 | Life Sciences