Postexercise Peripheral Oxygen Saturation After Completion of the 6-Minute Walk Test Predicts Successfully Reaching the Summit of Aconcagua
Objective The 6-minute walk test (6MWT) is a single measurement of functional status in patients with cardiovascular disease. It has not been studied at high altitude. We investigate the screening value of 6-minute walk distance (6MWD) and postexercise vital sign (VS) measurements as predictors of s...
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| Veröffentlicht in: | Wilderness & environmental medicine 2010-12, Vol.21 (4), p.309-317 |
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| creator | Lazio, Matthew P., MD Van Roo, Jon D., MD Pesce, Carlos, MD Malik, Sanjeev, MD Courtney, D. Mark, MD |
| description | Objective The 6-minute walk test (6MWT) is a single measurement of functional status in patients with cardiovascular disease. It has not been studied at high altitude. We investigate the screening value of 6-minute walk distance (6MWD) and postexercise vital sign (VS) measurements as predictors of successfully reaching the summit or development of acute mountain sickness (AMS) on Aconcagua (6962 m). Methods Prospective observational cohort in Aconcagua Provincial Park, Argentina. Adults climbing the normal route who registered with base camp physicians were included. There were no exclusion criteria. VSs were measured before (resting) and after (postexercise) completion of 6MWT while volunteers acclimatized at Plaza de Mulas base camp (4365 m). Volunteers proceeded towards the summit at their own pace and upon descent returned a questionnaire with maximum altitude reached and Lake Louise AMS Self-report Score (LLSelf). Results One hundred twenty-four volunteers completed the 6MWT. Sixty-four volunteers (51.6%) completed questionnaires; 56% summited. Median LLSelf was 4 (IQR: 3.0–6.5). There was no association between any resting or postexercise VS measurements and AMS. However, mean postexercise SpO2 was 80.8% in summiters and 76.4% in nonsummiters, a difference of −4.4% (95% CI: −6.7 to −2.0, p = 0.0005). Postexercise SpO2 < 75% had 97.2% sensitivity and negative likelihood ratio of 0.086 in predicting the outcome of successfully reaching the summit: only one climber with SpO2 < 75% successfully reached the summit. Conclusions This study provides the first published data on 6MWD recorded in the field at high altitude. Postexercise SpO2 < 75% may be a useful screening test for predicting the outcome of successfully reaching the summit of Aconcagua. |
| doi_str_mv | 10.1016/j.wem.2010.09.003 |
| format | Article |
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Mark, MD</creator><creatorcontrib>Lazio, Matthew P., MD ; Van Roo, Jon D., MD ; Pesce, Carlos, MD ; Malik, Sanjeev, MD ; Courtney, D. Mark, MD</creatorcontrib><description>Objective The 6-minute walk test (6MWT) is a single measurement of functional status in patients with cardiovascular disease. It has not been studied at high altitude. We investigate the screening value of 6-minute walk distance (6MWD) and postexercise vital sign (VS) measurements as predictors of successfully reaching the summit or development of acute mountain sickness (AMS) on Aconcagua (6962 m). Methods Prospective observational cohort in Aconcagua Provincial Park, Argentina. Adults climbing the normal route who registered with base camp physicians were included. There were no exclusion criteria. VSs were measured before (resting) and after (postexercise) completion of 6MWT while volunteers acclimatized at Plaza de Mulas base camp (4365 m). Volunteers proceeded towards the summit at their own pace and upon descent returned a questionnaire with maximum altitude reached and Lake Louise AMS Self-report Score (LLSelf). Results One hundred twenty-four volunteers completed the 6MWT. Sixty-four volunteers (51.6%) completed questionnaires; 56% summited. Median LLSelf was 4 (IQR: 3.0–6.5). There was no association between any resting or postexercise VS measurements and AMS. However, mean postexercise SpO2 was 80.8% in summiters and 76.4% in nonsummiters, a difference of −4.4% (95% CI: −6.7 to −2.0, p = 0.0005). Postexercise SpO2 < 75% had 97.2% sensitivity and negative likelihood ratio of 0.086 in predicting the outcome of successfully reaching the summit: only one climber with SpO2 < 75% successfully reached the summit. Conclusions This study provides the first published data on 6MWD recorded in the field at high altitude. Postexercise SpO2 < 75% may be a useful screening test for predicting the outcome of successfully reaching the summit of Aconcagua.</description><identifier>ISSN: 1080-6032</identifier><identifier>EISSN: 1545-1534</identifier><identifier>DOI: 10.1016/j.wem.2010.09.003</identifier><identifier>PMID: 21168783</identifier><language>eng</language><publisher>Los Angeles, CA: Elsevier Inc</publisher><subject>6-minute walk test ; Acclimatization ; Aconcagua ; Adult ; Altitude ; altitude sickness ; Altitude Sickness - prevention & control ; Argentina ; Blood Pressure ; Emergency ; Exercise Test - methods ; Female ; Humans ; hypoxia ; Male ; Mountaineering ; Oxygen - metabolism ; Predictive Value of Tests ; Prospective Studies ; sensitivity and specificity ; Surveys and Questionnaires ; Vital Signs ; Walking</subject><ispartof>Wilderness & environmental medicine, 2010-12, Vol.21 (4), p.309-317</ispartof><rights>Wilderness Medical Society</rights><rights>2010 Wilderness Medical Society</rights><rights>The Author(s) 2010</rights><rights>Copyright © 2010 Wilderness Medical Society. Published by Elsevier Inc. All rights reserved.</rights><rights>Copyright Allen Press Publishing Services Winter 2010</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c516t-af36573cedca8fbf905cdcbc89d47b4fdcd424a087eb84a6b33af09e096cb3df3</citedby><cites>FETCH-LOGICAL-c516t-af36573cedca8fbf905cdcbc89d47b4fdcd424a087eb84a6b33af09e096cb3df3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://journals.sagepub.com/doi/pdf/10.1016/j.wem.2010.09.003$$EPDF$$P50$$Gsage$$H</linktopdf><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S1080603210002954$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,21798,27901,27902,43597,43598,65534</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/21168783$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Lazio, Matthew P., MD</creatorcontrib><creatorcontrib>Van Roo, Jon D., MD</creatorcontrib><creatorcontrib>Pesce, Carlos, MD</creatorcontrib><creatorcontrib>Malik, Sanjeev, MD</creatorcontrib><creatorcontrib>Courtney, D. Mark, MD</creatorcontrib><title>Postexercise Peripheral Oxygen Saturation After Completion of the 6-Minute Walk Test Predicts Successfully Reaching the Summit of Aconcagua</title><title>Wilderness & environmental medicine</title><addtitle>Wilderness Environ Med</addtitle><description>Objective The 6-minute walk test (6MWT) is a single measurement of functional status in patients with cardiovascular disease. It has not been studied at high altitude. We investigate the screening value of 6-minute walk distance (6MWD) and postexercise vital sign (VS) measurements as predictors of successfully reaching the summit or development of acute mountain sickness (AMS) on Aconcagua (6962 m). Methods Prospective observational cohort in Aconcagua Provincial Park, Argentina. Adults climbing the normal route who registered with base camp physicians were included. There were no exclusion criteria. VSs were measured before (resting) and after (postexercise) completion of 6MWT while volunteers acclimatized at Plaza de Mulas base camp (4365 m). Volunteers proceeded towards the summit at their own pace and upon descent returned a questionnaire with maximum altitude reached and Lake Louise AMS Self-report Score (LLSelf). Results One hundred twenty-four volunteers completed the 6MWT. Sixty-four volunteers (51.6%) completed questionnaires; 56% summited. Median LLSelf was 4 (IQR: 3.0–6.5). There was no association between any resting or postexercise VS measurements and AMS. However, mean postexercise SpO2 was 80.8% in summiters and 76.4% in nonsummiters, a difference of −4.4% (95% CI: −6.7 to −2.0, p = 0.0005). Postexercise SpO2 < 75% had 97.2% sensitivity and negative likelihood ratio of 0.086 in predicting the outcome of successfully reaching the summit: only one climber with SpO2 < 75% successfully reached the summit. Conclusions This study provides the first published data on 6MWD recorded in the field at high altitude. Postexercise SpO2 < 75% may be a useful screening test for predicting the outcome of successfully reaching the summit of Aconcagua.</description><subject>6-minute walk test</subject><subject>Acclimatization</subject><subject>Aconcagua</subject><subject>Adult</subject><subject>Altitude</subject><subject>altitude sickness</subject><subject>Altitude Sickness - prevention & control</subject><subject>Argentina</subject><subject>Blood Pressure</subject><subject>Emergency</subject><subject>Exercise Test - methods</subject><subject>Female</subject><subject>Humans</subject><subject>hypoxia</subject><subject>Male</subject><subject>Mountaineering</subject><subject>Oxygen - metabolism</subject><subject>Predictive Value of Tests</subject><subject>Prospective Studies</subject><subject>sensitivity and specificity</subject><subject>Surveys and Questionnaires</subject><subject>Vital Signs</subject><subject>Walking</subject><issn>1080-6032</issn><issn>1545-1534</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>8G5</sourceid><sourceid>BENPR</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNp9kttu1DAQhiMEoqXwANwgixuuEsaxkzhCQlqtOElFXbFFXFqOM971ksPWdqD7DLw0TrdQqRe98kHf_89o_kmSlxQyCrR8u8t-Y5_lEN9QZwDsUXJKC16ktGD8cbyDgLQElp8kz7zfAeRcMPY0OckpLUUl2GnyZzX6gNfotPVIVujsfotOdeTi-rDBgaxVmJwKdhzIwgR0ZDn2-w5vPkZDwhZJmX61wxSQ_FDdT3KJPpCVw9bq4Ml60hq9N1PXHcg3VHprh82Naj31vQ2zx0KPg1abST1PnhjVeXxxe54l3z9-uFx-Ts8vPn1ZLs5TXdAypMqwsqiYxlYrYRpTQ6Fb3WhRt7xquGl1y3OuQFTYCK7KhjFloEaoS92w1rCz5M3Rd-_Gqyn2K3vrNXadGnCcvBQ5VKKmUEXy9T1yN05uiM1JwSugFS9FhOgR0m703qGRe2d75Q6SgpxzkjsZc5JzThJqGXOKmle3xlPTY_tf8S-YCGRHwKsN3lV9yPHdUYBxcr8sOum1xSFOyTrUQbajfVD9_p5ad3awOiaKB_R39aXPJcj1vFnzYlGIS1UXnP0FYoXJaQ</recordid><startdate>20101201</startdate><enddate>20101201</enddate><creator>Lazio, Matthew P., MD</creator><creator>Van Roo, Jon D., MD</creator><creator>Pesce, Carlos, MD</creator><creator>Malik, Sanjeev, MD</creator><creator>Courtney, D. Mark, MD</creator><general>Elsevier Inc</general><general>SAGE Publications</general><general>Elsevier Limited</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7X7</scope><scope>7XB</scope><scope>88A</scope><scope>88E</scope><scope>8FE</scope><scope>8FH</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>8G5</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>GNUQQ</scope><scope>GUQSH</scope><scope>HCIFZ</scope><scope>K9.</scope><scope>LK8</scope><scope>M0S</scope><scope>M1P</scope><scope>M2O</scope><scope>M7P</scope><scope>MBDVC</scope><scope>PADUT</scope><scope>PHGZM</scope><scope>PHGZT</scope><scope>PJZUB</scope><scope>PKEHL</scope><scope>PPXIY</scope><scope>PQEST</scope><scope>PQGLB</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>Q9U</scope><scope>7X8</scope></search><sort><creationdate>20101201</creationdate><title>Postexercise Peripheral Oxygen Saturation After Completion of the 6-Minute Walk Test Predicts Successfully Reaching the Summit of Aconcagua</title><author>Lazio, Matthew P., MD ; Van Roo, Jon D., MD ; Pesce, Carlos, MD ; Malik, Sanjeev, MD ; Courtney, D. Mark, MD</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c516t-af36573cedca8fbf905cdcbc89d47b4fdcd424a087eb84a6b33af09e096cb3df3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>6-minute walk test</topic><topic>Acclimatization</topic><topic>Aconcagua</topic><topic>Adult</topic><topic>Altitude</topic><topic>altitude sickness</topic><topic>Altitude Sickness - prevention & control</topic><topic>Argentina</topic><topic>Blood Pressure</topic><topic>Emergency</topic><topic>Exercise Test - methods</topic><topic>Female</topic><topic>Humans</topic><topic>hypoxia</topic><topic>Male</topic><topic>Mountaineering</topic><topic>Oxygen - metabolism</topic><topic>Predictive Value of Tests</topic><topic>Prospective Studies</topic><topic>sensitivity and specificity</topic><topic>Surveys and Questionnaires</topic><topic>Vital Signs</topic><topic>Walking</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lazio, Matthew P., MD</creatorcontrib><creatorcontrib>Van Roo, Jon D., MD</creatorcontrib><creatorcontrib>Pesce, Carlos, MD</creatorcontrib><creatorcontrib>Malik, Sanjeev, MD</creatorcontrib><creatorcontrib>Courtney, D. 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Mark, MD</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Postexercise Peripheral Oxygen Saturation After Completion of the 6-Minute Walk Test Predicts Successfully Reaching the Summit of Aconcagua</atitle><jtitle>Wilderness & environmental medicine</jtitle><addtitle>Wilderness Environ Med</addtitle><date>2010-12-01</date><risdate>2010</risdate><volume>21</volume><issue>4</issue><spage>309</spage><epage>317</epage><pages>309-317</pages><issn>1080-6032</issn><eissn>1545-1534</eissn><abstract>Objective The 6-minute walk test (6MWT) is a single measurement of functional status in patients with cardiovascular disease. It has not been studied at high altitude. We investigate the screening value of 6-minute walk distance (6MWD) and postexercise vital sign (VS) measurements as predictors of successfully reaching the summit or development of acute mountain sickness (AMS) on Aconcagua (6962 m). Methods Prospective observational cohort in Aconcagua Provincial Park, Argentina. Adults climbing the normal route who registered with base camp physicians were included. There were no exclusion criteria. VSs were measured before (resting) and after (postexercise) completion of 6MWT while volunteers acclimatized at Plaza de Mulas base camp (4365 m). Volunteers proceeded towards the summit at their own pace and upon descent returned a questionnaire with maximum altitude reached and Lake Louise AMS Self-report Score (LLSelf). Results One hundred twenty-four volunteers completed the 6MWT. Sixty-four volunteers (51.6%) completed questionnaires; 56% summited. Median LLSelf was 4 (IQR: 3.0–6.5). There was no association between any resting or postexercise VS measurements and AMS. However, mean postexercise SpO2 was 80.8% in summiters and 76.4% in nonsummiters, a difference of −4.4% (95% CI: −6.7 to −2.0, p = 0.0005). Postexercise SpO2 < 75% had 97.2% sensitivity and negative likelihood ratio of 0.086 in predicting the outcome of successfully reaching the summit: only one climber with SpO2 < 75% successfully reached the summit. Conclusions This study provides the first published data on 6MWD recorded in the field at high altitude. Postexercise SpO2 < 75% may be a useful screening test for predicting the outcome of successfully reaching the summit of Aconcagua.</abstract><cop>Los Angeles, CA</cop><pub>Elsevier Inc</pub><pmid>21168783</pmid><doi>10.1016/j.wem.2010.09.003</doi><tpages>9</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | 6-minute walk test Acclimatization Aconcagua Adult Altitude altitude sickness Altitude Sickness - prevention & control Argentina Blood Pressure Emergency Exercise Test - methods Female Humans hypoxia Male Mountaineering Oxygen - metabolism Predictive Value of Tests Prospective Studies sensitivity and specificity Surveys and Questionnaires Vital Signs Walking |
| title | Postexercise Peripheral Oxygen Saturation After Completion of the 6-Minute Walk Test Predicts Successfully Reaching the Summit of Aconcagua |
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