{"id":"https://openalex.org/W2017113539","doi":"https://doi.org/10.1109/iembs.2011.6090365","title":"Evaluation of a novel cardiac output index on healthy elderly, cardiovascular and heart failure patients during dynamic exercise","display_name":"Evaluation of a novel cardiac output index on healthy elderly, cardiovascular and heart failure patients during dynamic exercise","publication_year":2011,"publication_date":"2011-08-01","ids":{"openalex":"https://openalex.org/W2017113539","doi":"https://doi.org/10.1109/iembs.2011.6090365","mag":"2017113539","pmid":"https://pubmed.ncbi.nlm.nih.gov/22254608"},"language":"en","primary_location":{"id":"doi:10.1109/iembs.2011.6090365","is_oa":false,"landing_page_url":"https://doi.org/10.1109/iembs.2011.6090365","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society","raw_type":"proceedings-article"},"type":"article","indexed_in":["crossref","pubmed"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5024862772","display_name":"L. Wang","orcid":null},"institutions":[{"id":"https://openalex.org/I177725633","display_name":"Chinese University of Hong Kong","ror":"https://ror.org/00t33hh48","country_code":"CN","type":"education","lineage":["https://openalex.org/I177725633"]}],"countries":["CN"],"is_corresponding":true,"raw_author_name":"L. Wang","raw_affiliation_strings":["Joint Research Centre for Biomedical Engineering, Department of Electronic Engineering, The Chinese University of Hong Kong, Hong Kong SAR","Joint Research Centre for Biomedical Engineering, Dept. of Electronic Engineering, The Chinese Univ. of Hong Kong, Hong Kong SAR"],"affiliations":[{"raw_affiliation_string":"Joint Research Centre for Biomedical Engineering, Department of Electronic Engineering, The Chinese University of Hong Kong, Hong Kong SAR","institution_ids":["https://openalex.org/I177725633"]},{"raw_affiliation_string":"Joint Research Centre for Biomedical Engineering, Dept. of Electronic Engineering, The Chinese Univ. of Hong Kong, Hong Kong SAR","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5015802672","display_name":"Carmen C. Y. Poon","orcid":"https://orcid.org/0000-0001-7717-4752"},"institutions":[{"id":"https://openalex.org/I177725633","display_name":"Chinese University of Hong Kong","ror":"https://ror.org/00t33hh48","country_code":"CN","type":"education","lineage":["https://openalex.org/I177725633"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"C. C. Y. Poon","raw_affiliation_strings":["Joint Research Centre of Biomedical Engineering Department of Electronic Engineering, Chinese University of Hong Kong, Hong Kong, China","Joint Research Centre for Biomedical Engineering, Dept. of Electronic Engineering, The Chinese Univ. of Hong Kong, Hong Kong SAR"],"affiliations":[{"raw_affiliation_string":"Joint Research Centre of Biomedical Engineering Department of Electronic Engineering, Chinese University of Hong Kong, Hong Kong, China","institution_ids":["https://openalex.org/I177725633"]},{"raw_affiliation_string":"Joint Research Centre for Biomedical Engineering, Dept. of Electronic Engineering, The Chinese Univ. of Hong Kong, Hong Kong SAR","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5021439649","display_name":"Gabriel Wai\u2010Kwok Yip","orcid":"https://orcid.org/0000-0002-3859-7194"},"institutions":[{"id":"https://openalex.org/I177725633","display_name":"Chinese University of Hong Kong","ror":"https://ror.org/00t33hh48","country_code":"CN","type":"education","lineage":["https://openalex.org/I177725633"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"G. Yip","raw_affiliation_strings":["Division of Cardiology, Department of Medicine & Therapeutics, Chinese University of Hong Kong, Hong Kong, China","Division of Cardiology, Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong"],"affiliations":[{"raw_affiliation_string":"Division of Cardiology, Department of Medicine & Therapeutics, Chinese University of Hong Kong, Hong Kong, China","institution_ids":["https://openalex.org/I177725633"]},{"raw_affiliation_string":"Division of Cardiology, Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong","institution_ids":["https://openalex.org/I177725633"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5036005135","display_name":"Cheuk\u2010Man Yu","orcid":"https://orcid.org/0000-0002-2927-3702"},"institutions":[{"id":"https://openalex.org/I177725633","display_name":"Chinese University of Hong Kong","ror":"https://ror.org/00t33hh48","country_code":"CN","type":"education","lineage":["https://openalex.org/I177725633"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Cheuk Man Yu","raw_affiliation_strings":["Division of Cardiology, Department of Medicine & Therapeutics, Chinese University of Hong Kong, Hong Kong, China","Division of Cardiology, Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong"],"affiliations":[{"raw_affiliation_string":"Division of Cardiology, Department of Medicine & Therapeutics, Chinese University of Hong Kong, Hong Kong, China","institution_ids":["https://openalex.org/I177725633"]},{"raw_affiliation_string":"Division of Cardiology, Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong","institution_ids":["https://openalex.org/I177725633"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5070333614","display_name":"Yuan\u2010Ting Zhang","orcid":"https://orcid.org/0000-0003-4150-5470"},"institutions":[{"id":"https://openalex.org/I4210145761","display_name":"Shenzhen Institutes of Advanced Technology","ror":"https://ror.org/04gh4er46","country_code":"CN","type":"facility","lineage":["https://openalex.org/I19820366","https://openalex.org/I4210145761"]},{"id":"https://openalex.org/I19820366","display_name":"Chinese Academy of Sciences","ror":"https://ror.org/034t30j35","country_code":"CN","type":"funder","lineage":["https://openalex.org/I19820366"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Y. T. Zhang","raw_affiliation_strings":["Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, China, and Key Laboratory for Health Informatics, Chinese Academy of Sciences (CAS), China","Joint Research Centre for Biomedical Engineering, Dept. of Electronic Engineering, The Chinese Univ. of Hong Kong, Hong Kong SAR"],"affiliations":[{"raw_affiliation_string":"Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, China, and Key Laboratory for Health Informatics, Chinese Academy of Sciences (CAS), China","institution_ids":["https://openalex.org/I4210145761","https://openalex.org/I19820366"]},{"raw_affiliation_string":"Joint Research Centre for Biomedical Engineering, Dept. of Electronic Engineering, The Chinese Univ. of Hong Kong, Hong Kong SAR","institution_ids":[]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":5,"corresponding_author_ids":["https://openalex.org/A5024862772"],"corresponding_institution_ids":["https://openalex.org/I177725633"],"apc_list":null,"apc_paid":null,"fwci":0.2867,"has_fulltext":false,"cited_by_count":1,"citation_normalized_percentile":{"value":0.63019227,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":94},"biblio":{"volume":"25","issue":null,"first_page":"1515","last_page":"1518"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11700","display_name":"Hemodynamic Monitoring and Therapy","score":0.9995999932289124,"subfield":{"id":"https://openalex.org/subfields/2746","display_name":"Surgery"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},"topics":[{"id":"https://openalex.org/T11700","display_name":"Hemodynamic Monitoring and Therapy","score":0.9995999932289124,"subfield":{"id":"https://openalex.org/subfields/2746","display_name":"Surgery"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T11196","display_name":"Non-Invasive Vital Sign Monitoring","score":0.9990000128746033,"subfield":{"id":"https://openalex.org/subfields/2204","display_name":"Biomedical Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10745","display_name":"Heart Rate Variability and Autonomic Control","score":0.9975000023841858,"subfield":{"id":"https://openalex.org/subfields/2705","display_name":"Cardiology and Cardiovascular Medicine"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/heart-failure","display_name":"Heart failure","score":0.7366518974304199},{"id":"https://openalex.org/keywords/medicine","display_name":"Medicine","score":0.5875037908554077},{"id":"https://openalex.org/keywords/cardiology","display_name":"Cardiology","score":0.5621311664581299},{"id":"https://openalex.org/keywords/index","display_name":"Index (typography)","score":0.4745134711265564},{"id":"https://openalex.org/keywords/cardiac-output","display_name":"Cardiac output","score":0.447842538356781},{"id":"https://openalex.org/keywords/internal-medicine","display_name":"Internal medicine","score":0.4378342926502228},{"id":"https://openalex.org/keywords/cardiac-index","display_name":"Cardiac index","score":0.4153744578361511},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.22353067994117737},{"id":"https://openalex.org/keywords/hemodynamics","display_name":"Hemodynamics","score":0.18770739436149597},{"id":"https://openalex.org/keywords/world-wide-web","display_name":"World Wide Web","score":0.08085906505584717}],"concepts":[{"id":"https://openalex.org/C2778198053","wikidata":"https://www.wikidata.org/wiki/Q181754","display_name":"Heart failure","level":2,"score":0.7366518974304199},{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.5875037908554077},{"id":"https://openalex.org/C164705383","wikidata":"https://www.wikidata.org/wiki/Q10379","display_name":"Cardiology","level":1,"score":0.5621311664581299},{"id":"https://openalex.org/C2777382242","wikidata":"https://www.wikidata.org/wiki/Q6017816","display_name":"Index (typography)","level":2,"score":0.4745134711265564},{"id":"https://openalex.org/C139940330","wikidata":"https://www.wikidata.org/wiki/Q596579","display_name":"Cardiac output","level":3,"score":0.447842538356781},{"id":"https://openalex.org/C126322002","wikidata":"https://www.wikidata.org/wiki/Q11180","display_name":"Internal medicine","level":1,"score":0.4378342926502228},{"id":"https://openalex.org/C31861589","wikidata":"https://www.wikidata.org/wiki/Q618068","display_name":"Cardiac index","level":4,"score":0.4153744578361511},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.22353067994117737},{"id":"https://openalex.org/C178853913","wikidata":"https://www.wikidata.org/wiki/Q1642137","display_name":"Hemodynamics","level":2,"score":0.18770739436149597},{"id":"https://openalex.org/C136764020","wikidata":"https://www.wikidata.org/wiki/Q466","display_name":"World Wide Web","level":1,"score":0.08085906505584717}],"mesh":[{"descriptor_ui":"D002302","descriptor_name":"Cardiac Output","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D002302","descriptor_name":"Cardiac Output","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D002302","descriptor_name":"Cardiac Output","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D002318","descriptor_name":"Cardiovascular Diseases","qualifier_ui":"Q000175","qualifier_name":"diagnosis","is_major_topic":false},{"descriptor_ui":"D002318","descriptor_name":"Cardiovascular Diseases","qualifier_ui":"Q000175","qualifier_name":"diagnosis","is_major_topic":false},{"descriptor_ui":"D002318","descriptor_name":"Cardiovascular Diseases","qualifier_ui":"Q000175","qualifier_name":"diagnosis","is_major_topic":false},{"descriptor_ui":"D003936","descriptor_name":"Diagnosis, Computer-Assisted","qualifier_ui":"Q000379","qualifier_name":"methods","is_major_topic":false},{"descriptor_ui":"D003936","descriptor_name":"Diagnosis, Computer-Assisted","qualifier_ui":"Q000379","qualifier_name":"methods","is_major_topic":false},{"descriptor_ui":"D003936","descriptor_name":"Diagnosis, Computer-Assisted","qualifier_ui":"Q000379","qualifier_name":"methods","is_major_topic":false},{"descriptor_ui":"D004569","descriptor_name":"Electroencephalography","qualifier_ui":"Q000379","qualifier_name":"methods","is_major_topic":false},{"descriptor_ui":"D004569","descriptor_name":"Electroencephalography","qualifier_ui":"Q000379","qualifier_name":"methods","is_major_topic":false},{"descriptor_ui":"D004569","descriptor_name":"Electroencephalography","qualifier_ui":"Q000379","qualifier_name":"methods","is_major_topic":false},{"descriptor_ui":"D005080","descriptor_name":"Exercise Test","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D005080","descriptor_name":"Exercise Test","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D005080","descriptor_name":"Exercise Test","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D005260","descriptor_name":"Female","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D005260","descriptor_name":"Female","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D005260","descriptor_name":"Female","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D006305","descriptor_name":"Health Status Indicators","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D006305","descriptor_name":"Health Status Indicators","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D006305","descriptor_name":"Health Status Indicators","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D006333","descriptor_name":"Heart Failure","qualifier_ui":"Q000175","qualifier_name":"diagnosis","is_major_topic":false},{"descriptor_ui":"D006333","descriptor_name":"Heart Failure","qualifier_ui":"Q000175","qualifier_name":"diagnosis","is_major_topic":false},{"descriptor_ui":"D006333","descriptor_name":"Heart Failure","qualifier_ui":"Q000175","qualifier_name":"diagnosis","is_major_topic":false},{"descriptor_ui":"D006801","descriptor_name":"Humans","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D006801","descriptor_name":"Humans","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D006801","descriptor_name":"Humans","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D008297","descriptor_name":"Male","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D008297","descriptor_name":"Male","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D008297","descriptor_name":"Male","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D012016","descriptor_name":"Reference Values","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D012016","descriptor_name":"Reference Values","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D012016","descriptor_name":"Reference Values","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D012680","descriptor_name":"Sensitivity and Specificity","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D012680","descriptor_name":"Sensitivity and Specificity","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D012680","descriptor_name":"Sensitivity and Specificity","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D015203","descriptor_name":"Reproducibility of Results","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D015203","descriptor_name":"Reproducibility of Results","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D015203","descriptor_name":"Reproducibility of Results","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D017156","descriptor_name":"Photoplethysmography","qualifier_ui":"Q000379","qualifier_name":"methods","is_major_topic":false},{"descriptor_ui":"D017156","descriptor_name":"Photoplethysmography","qualifier_ui":"Q000379","qualifier_name":"methods","is_major_topic":false},{"descriptor_ui":"D017156","descriptor_name":"Photoplethysmography","qualifier_ui":"Q000379","qualifier_name":"methods","is_major_topic":false}],"locations_count":2,"locations":[{"id":"doi:10.1109/iembs.2011.6090365","is_oa":false,"landing_page_url":"https://doi.org/10.1109/iembs.2011.6090365","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society","raw_type":"proceedings-article"},{"id":"pmid:22254608","is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/22254608","pdf_url":null,"source":{"id":"https://openalex.org/S4306525036","display_name":"PubMed","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference","raw_type":null}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Good health and well-being","id":"https://metadata.un.org/sdg/3","score":0.7099999785423279}],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":17,"referenced_works":["https://openalex.org/W1480029970","https://openalex.org/W1988354580","https://openalex.org/W2003768242","https://openalex.org/W2014470025","https://openalex.org/W2015129099","https://openalex.org/W2021674224","https://openalex.org/W2038750973","https://openalex.org/W2043121585","https://openalex.org/W2044911822","https://openalex.org/W2069738663","https://openalex.org/W2087109161","https://openalex.org/W2106541747","https://openalex.org/W2110373537","https://openalex.org/W2113999865","https://openalex.org/W2114367713","https://openalex.org/W2403122815","https://openalex.org/W2614781785"],"related_works":["https://openalex.org/W2049074132","https://openalex.org/W1881880304","https://openalex.org/W2002297746","https://openalex.org/W3092492413","https://openalex.org/W2252537276","https://openalex.org/W2142073495","https://openalex.org/W2751365341","https://openalex.org/W1673228892","https://openalex.org/W2054736082","https://openalex.org/W2409144740"],"abstract_inverted_index":{"We":[0],"have":[1],"recently":[2],"proposed":[3],"a":[4,39],"novel":[5],"CO":[6,36,91,127],"index,":[7],"namely":[8],"pulse":[9],"time":[10],"reflection":[11],"ratio":[12],"(PTRR),":[13],"which":[14],"is":[15,31],"extracted":[16],"from":[17,23],"photoplethysmogram":[18],"and":[19,21,26,76,89,99,115],"electrocardiogram":[20],"measurable":[22],"wearable":[24],"devices,":[25],"proved":[27],"that":[28],"this":[29,49,56,120],"index":[30],"potentially":[32],"useful":[33],"for":[34,125],"dynamic":[35,134],"monitoring":[37,128],"in":[38,92,132],"preliminary":[40],"study":[41],"carried":[42],"out":[43],"on":[44,61,103,117],"young,":[45],"healthy":[46,71],"subjects.":[47],"In":[48],"study,":[50],"we":[51],"presented":[52],"an":[53],"evaluation":[54],"of":[55],"technique":[57,121],"against":[58],"impedance":[59],"cardiography":[60],"64":[62],"subjects":[63,94],"undergoing":[64],"incremental":[65],"maximal":[66],"exercise":[67],"testing,":[68],"including":[69],"15":[70],"elderly,":[72],"19":[73],"cardiovascular":[74],"patients":[75],"30":[77],"heart":[78],"failure":[79],"patients.":[80],"Results":[81],"showed":[82],"significant":[83,101],"intra-subject":[84],"correlations":[85],"(r)":[86],"between":[87],"PTRR":[88],"reference":[90],"all":[93],"(mean":[95],"r:":[96],"0.93,":[97],"p<0.05)":[98],"no":[100],"differences":[102],"mean":[104],"r":[105],"among":[106],"subject":[107],"populations":[108],"(one-way":[109],"ANOVA,":[110],"p=0.48).":[111],"With":[112],"further":[113],"development":[114],"testing":[116],"mobile":[118],"subjects,":[119],"can":[122],"be":[123],"applied":[124],"long-term":[126],"at":[129],"home":[130],"or":[131],"other":[133],"situations.":[135]},"counts_by_year":[{"year":2014,"cited_by_count":1}],"updated_date":"2026-01-13T01:12:25.745995","created_date":"2025-10-10T00:00:00"}