Navigation Links
2013's most compelling International Space Station results announced
Date:6/18/2014

ction during long-term exposure to microgravity, specifically atrophy (decrease in the heart's muscle size) diastolic dysfunction, the functional consequences for orthostatic intolerance (symptoms exhibited only while standing), exercise capability and risk for cardiac arrhythmias (heart rate irregularities). By quantifying the extent, time course and clinical significance of cardiac atrophy associated with long duration spaceflight, researchers can identify the mechanisms of this atrophy and the functional consequences for astronauts who spend extended periods of time in space.

"The results for ICV showed that the human heart adapts well to microgravity," said Levine. "Especially early in flight, the heart volume gets smaller, and blood flows a little more slowly into the heart. As the astronauts get into their exercise countermeasure in space, however, they are able to overcome this initial deconditioning response. For some astronauts, especially those who were less fit prior to flight, they actually developed physiological hypertrophy, similar to an athlete's heart."

According to Levine, the research showed that there was nothing magical about microgravity and the heart. The heart adapted to the load that was placed upon it - if the load reduced, the heart would atrophy; but, if the load increased, there was nothing about microgravity that prevented the heart from responding appropriately. In addition, this study showed that spaceflight by itself does not cause cardiac arrhythmias--a problem that had been worrisome for many years. Astronauts who have lots of extra heart beats on Earth, have them also in space, but these do not increase in number or severity, nor are the fundamental electrical properties of the heart altered by spaceflight.

These results have important implications for aging - individuals who keep up their fitness over a lifetime are able to preserve the youthful flexibility of the heart and blood vessels, just like ast
'/>"/>

Contact: Laura Niles
Laura.E.Niles@nasa.gov
281-244-7069
NASA/Johnson Space Center
Source:Eurekalert  

Page: 1 2 3 4 5 6

Related biology news :

1. International study yields important clues to the genetics of epilepsy
2. An international partnership takes the stage at ESOF 2014
3. Scientific breakthrough: International collaboration has sequence salmon genome
4. International forum to focus on scientific aspects and social and economic impact of salinity
5. International forum to focus on social and economic impact of salinity
6. International collaboration highlights new mechanism explaining how cancer cells spread
7. International research group documents unique songbird diversity of the Eastern Himalayas
8. Forum highlights future of research aboard the International Space Station
9. Leading cfaed scientists organize international workshop about DNA-based microchips
10. The International Society for Stem Cell Research 12th Annual Meeting, June 18-21, 2014
11. Lawrence Krauss is honored at international festival of science documentary films
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
2013's most compelling International Space Station results announced
(Date:11/4/2014)... majority of Madagascar,s 101 species of lemurs are threatened ... the rainforests they call home. A new study by ... have on rainforest tree populations, which raises concerns about ... region,s rich biodiversity. , A large proportion of trees ... Lemurs in turn disperse the seeds of their fruit ...
(Date:11/3/2014)... 3, 2014 Research and Markets has ... - Technologies, Markets and Companies" to their offering. ... and methods, which have already started to play an important ... is replacing the old fashioned bone marrow transplants. Role of ... bound to become a part of medical practice. ...
(Date:11/3/2014)... ANGELES , Nov. 3, 2014  NeuroSigma ... -based life sciences company focused on commercialization ... system for the treatment of neurological and ... of Industrial Property has issued a Notice of ... patent application is co-owned by NeuroSigma and the ...
Breaking Biology News(10 mins):Gardeners of Madagascar rainforest at risk 2Gardeners of Madagascar rainforest at risk 3Global Cell Therapy - Technologies, Markets and Companies: 2014 Report 2Global Cell Therapy - Technologies, Markets and Companies: 2014 Report 3NeuroSigma Receives Notice of Allowance from the Mexican Institute of Industrial Property Covering Subcutaneous Trigeminal Nerve Stimulation (sTNS) 2NeuroSigma Receives Notice of Allowance from the Mexican Institute of Industrial Property Covering Subcutaneous Trigeminal Nerve Stimulation (sTNS) 3
... won the American Geophysical Unions 2008 journalism awards: ... Excellence in Science JournalismNews for her article on the biggest ... shelf suspected to be a victim of global warming. ... daily newspaper in Montreal, Quebec, Canada. ...
... According to a report released today by the Wildlife ... Cambodias famed Tonle Sap region have staged remarkable comebacks, ... park rangers to provide 24-hour protection to breeding colonies. ... and egg collectors to protect and monitor the colonies, ...
... at North Carolina State University have pinpointed a small group ... to produce a hormone that is key to their development. ... production in plants affects both a plants growth and its ... assistant professor of genetics, and a team of geneticists and ...
Cached Biology News:AGU Journalism Awards won by Margaret Munro and Dr. Richard Smith 2NC State researchers identify genes key to hormone production in plants 2
(Date:11/26/2014)... In keeping with the holiday spirit, ... last-minute Thanksgiving savings. The company is offering up a ... lines this holiday weekend as well as a photo ... Cyber Monday are right around the corner, and DNA ... customers and those looking to explore their ancestry, health, ...
(Date:11/26/2014)... (PRWEB) November 26, 2014 The ... City’s award-winning technology innovation centers, announced today that ... closing on December 1st. “Do you have a ... so, I want to know about it. AccelerateBaltimore ... idea to product in just 13 weeks.” ...
(Date:11/26/2014)... ADDISON, TX (PRWEB) November 25, 2014 ... age-defying skincare products, earned three prestigious MarCom Awards for ... , Nerium received a Platinum MarCom Award, the organization’s ... Real Event in St. Louis held in April of ... for more than 14,000 attendees. Additionally, Nerium was awarded ...
(Date:11/26/2014)... DE (PRWEB) November 26, 2014 ... Heroes recognition reception on December 5, 2014, in San ... meeting. The MPN Heroes event will honor clinicians, caregivers, ... field of myeloproliferative neoplasms (MPNs). , Special guest ... discuss his family's cancer journey at the reception. ...
Breaking Biology Technology:DNA Spectrum Offers Last Minute Thanksgiving Coupons 2DNA Spectrum Offers Last Minute Thanksgiving Coupons 3AccelerateBaltimore Applications to Close in 6 Days 2AccelerateBaltimore Applications to Close in 6 Days 3Nerium International™ Wins One Platinum, Two Gold MarCom Awards 2CURE Magazine and Incyte to Honor MPN Heroes 2CURE Magazine and Incyte to Honor MPN Heroes 3CURE Magazine and Incyte to Honor MPN Heroes 4
... as a cleaner solution to tomorrow,s energy needs, with ... But one reason fuel cells aren,t already more ... catalysts used even in today,s state-of-the-art fuels cells break ... electricity. In addition, current technology relies on small particles ...
... 2011 BioSpace launched the 2011 Bio ... in The Research Triangle Park and across North Carolina. ... 10 life science employers. Each campaign participant,s logo is added ... is promoted online and at industry events or career fairs. ...
... China-Biotics, Inc. (Nasdaq: CHBT ) ("China-Biotics" or ... probiotics products in China, today announced that the Company ... signed U.S. customer. The U.S. based nutritional ... entered into its agreement with China-Biotics on March 28, ...
Cached Biology Technology:Novel nanowires boost fuel cell efficiency 2BioSpace Highlights North Carolina's Life Science Regions 2China-Biotics Receives First U.S. Sales Order 2China-Biotics Receives First U.S. Sales Order 3
... Anti-phospho-Hck [pTyr 209/ pSer 211 ] affinity ... in Dulbecco's phosphate buffered saline (without Mg 2+ ... 1.0 mg/ml BSA (IgG and protease free) and ... from the region of mouse Hck that contains ...
... Useful as a positive control for ... to chromatin in vivo is a crucial ... extent of crosslinking is probably the most ... subsequent immunoprecipitation step should be taken into ...
The Programmable MP-5000P-F Power Supply can be applied for any Microfluidic application....
... MAX POWER 500V Programmable Power Supply ... which can handle virtually any application ... current blotting. It is unique in ... The MAX POWER Programmable Power Supply ...
Biology Products: