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- Cardiac_rhythm_problems_during_space_flight abstract "Heart rhythm disturbances have been seen among astronauts. Most of these have been related to cardiovascular disease, but it is not clear whether this was due to pre-existing conditions or effects of space flight. It is hoped that advanced screening for coronary disease has greatly mitigated this risk. Other heart rhythm problems, such as atrial fibrillation, can develop over time, necessitating periodic screening of crewmembers’ heart rhythms. Beyond these terrestrial heart risks, some concern exists that prolonged exposure to microgravity may lead to heart rhythm disturbances. Although this has not been observed to date, further surveillance is warranted.The incidence and clinical significance of cardiac arrhythmias during long-term exposure to microgravity experienced on the International Space Station (ISS) or during a prolonged (that is, up to 3 years) sojourn to Mars or on the Moon are a concern for the National Aeronautics and Space Administration (NASA). At present, there are only anecdotal reports of cardiac arrhythmias in space, including one documented episode of non-sustained ventricular tachycardia. However, the potential catastrophic nature of a sudden cardiac death in the remote, but highly public, environment of space flight has led to continued concern since the early days of the space program over the possibility that space flight might be arrhythmogenic. Indeed, there are known and well-defined changes in the cardiovascular system with space flight: plasma volume is reduced; left ventricular mass in decreased; the autonomic nervous system adapts to the microgravity environment.Combined, these physiologic adaptations suggest that changes in cardiac structure and neurohumoral environment during space flight could alter electrical conduction, although the evidence supporting this contention consists mostly of minor changes in QT interval in a small number of astronauts after long-duration space flight. Concurrent with efforts by Flight Medicine to improve screening techniques, as NASA enters the era of exploration class missions, it will be critical to determine with the highest degree of certainty whether space flight by itself alters cardiac structure and function sufficiently to increase the risk for arrhythmias. This undertaking must be done in a highly systematic way.".
- Cardiac_rhythm_problems_during_space_flight thumbnail Cardiac_Figure_1.jpg?width=300.
- Cardiac_rhythm_problems_during_space_flight wikiPageExternalLink cohen.pdf.
- Cardiac_rhythm_problems_during_space_flight wikiPageExternalLink 756.html.
- Cardiac_rhythm_problems_during_space_flight wikiPageExternalLink 22134699.
- Cardiac_rhythm_problems_during_space_flight wikiPageID "39685359".
- Cardiac_rhythm_problems_during_space_flight wikiPageRevisionID "594173693".
- Cardiac_rhythm_problems_during_space_flight article "Human Health and Performance Risks of Space Exploration Missions".
- Cardiac_rhythm_problems_during_space_flight comment "NASA SP-2009-3405".
- Cardiac_rhythm_problems_during_space_flight url "http://humanresearchroadmap.nasa.gov/evidence/reports/EvidenceBook.pdf".
- Cardiac_rhythm_problems_during_space_flight subject Category:Space_medicine.
- Cardiac_rhythm_problems_during_space_flight subject Category:Spaceflight.
- Cardiac_rhythm_problems_during_space_flight comment "Heart rhythm disturbances have been seen among astronauts. Most of these have been related to cardiovascular disease, but it is not clear whether this was due to pre-existing conditions or effects of space flight. It is hoped that advanced screening for coronary disease has greatly mitigated this risk. Other heart rhythm problems, such as atrial fibrillation, can develop over time, necessitating periodic screening of crewmembers’ heart rhythms.".
- Cardiac_rhythm_problems_during_space_flight label "Cardiac rhythm problems during space flight".
- Cardiac_rhythm_problems_during_space_flight sameAs m.0w3385h.
- Cardiac_rhythm_problems_during_space_flight sameAs Q16986124.
- Cardiac_rhythm_problems_during_space_flight sameAs Q16986124.
- Cardiac_rhythm_problems_during_space_flight wasDerivedFrom Cardiac_rhythm_problems_during_space_flight?oldid=594173693.
- Cardiac_rhythm_problems_during_space_flight depiction Cardiac_Figure_1.jpg.
- Cardiac_rhythm_problems_during_space_flight isPrimaryTopicOf Cardiac_rhythm_problems_during_space_flight.