{"id":"https://openalex.org/W4205202599","doi":"https://doi.org/10.23919/cinc53138.2021.9662902","title":"Transfer Function Gain Between Heart Period and QT Variabilities Increases During Sympathetic Activation Induced by Head-up Tilt","display_name":"Transfer Function Gain Between Heart Period and QT Variabilities Increases During Sympathetic Activation Induced by Head-up Tilt","publication_year":2021,"publication_date":"2021-09-13","ids":{"openalex":"https://openalex.org/W4205202599","doi":"https://doi.org/10.23919/cinc53138.2021.9662902"},"language":"en","primary_location":{"id":"doi:10.23919/cinc53138.2021.9662902","is_oa":false,"landing_page_url":"https://doi.org/10.23919/cinc53138.2021.9662902","pdf_url":null,"source":{"id":"https://openalex.org/S4363605378","display_name":"2021 Computing in Cardiology (CinC)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"conference"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2021 Computing in Cardiology (CinC)","raw_type":"proceedings-article"},"type":"article","indexed_in":["crossref"],"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/A5018102991","display_name":"Vlasta Bari","orcid":"https://orcid.org/0000-0002-5346-2677"},"institutions":[{"id":"https://openalex.org/I4210099239","display_name":"IRCCS Policlinico San Donato","ror":"https://ror.org/01220jp31","country_code":"IT","type":"healthcare","lineage":["https://openalex.org/I4210099239","https://openalex.org/I4210153126"]}],"countries":["IT"],"is_corresponding":true,"raw_author_name":"Vlasta Bari","raw_affiliation_strings":["Department of Cardiothoracic, Vascular Anesthesia and Intensive Care, IRCCS Policlinico San Donato, San Donato Milanese, Milan, Italy","IRCCS Policlinico San Donato, Milan, Italy"],"affiliations":[{"raw_affiliation_string":"Department of Cardiothoracic, Vascular Anesthesia and Intensive Care, IRCCS Policlinico San Donato, San Donato Milanese, Milan, Italy","institution_ids":["https://openalex.org/I4210099239"]},{"raw_affiliation_string":"IRCCS Policlinico San Donato, Milan, Italy","institution_ids":["https://openalex.org/I4210099239"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5050880536","display_name":"Beatrice De Maria","orcid":"https://orcid.org/0000-0001-5360-3137"},"institutions":[{"id":"https://openalex.org/I4210091499","display_name":"Istituti Clinici Scientifici Maugeri","ror":"https://ror.org/00mc77d93","country_code":"IT","type":"healthcare","lineage":["https://openalex.org/I4210091499","https://openalex.org/I4210105320","https://openalex.org/I4210153126"]}],"countries":["IT"],"is_corresponding":false,"raw_author_name":"Beatrice De Maria","raw_affiliation_strings":["IRCCS Istituti Clinici Scientifici Maugeri, Istituto di Milano, Milan, Italy"],"affiliations":[{"raw_affiliation_string":"IRCCS Istituti Clinici Scientifici Maugeri, Istituto di Milano, Milan, Italy","institution_ids":["https://openalex.org/I4210091499"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5046218708","display_name":"Francesca Gelpi","orcid":"https://orcid.org/0000-0002-9221-6153"},"institutions":[{"id":"https://openalex.org/I4210099239","display_name":"IRCCS Policlinico San Donato","ror":"https://ror.org/01220jp31","country_code":"IT","type":"healthcare","lineage":["https://openalex.org/I4210099239","https://openalex.org/I4210153126"]}],"countries":["IT"],"is_corresponding":false,"raw_author_name":"Francesca Gelpi","raw_affiliation_strings":["Department of Cardiothoracic, Vascular Anesthesia and Intensive Care, IRCCS Policlinico San Donato, San Donato Milanese, Milan, Italy"],"affiliations":[{"raw_affiliation_string":"Department of Cardiothoracic, Vascular Anesthesia and Intensive Care, IRCCS Policlinico San Donato, San Donato Milanese, Milan, Italy","institution_ids":["https://openalex.org/I4210099239"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5031902647","display_name":"Beatrice Cairo","orcid":"https://orcid.org/0000-0003-3396-6883"},"institutions":[{"id":"https://openalex.org/I189158943","display_name":"University of Milan","ror":"https://ror.org/00wjc7c48","country_code":"IT","type":"education","lineage":["https://openalex.org/I189158943"]}],"countries":["IT"],"is_corresponding":false,"raw_author_name":"Beatrice Cairo","raw_affiliation_strings":["Department of Biomedical Sciences for Health, University of Milan, Milan, Italy"],"affiliations":[{"raw_affiliation_string":"Department of Biomedical Sciences for Health, University of Milan, Milan, Italy","institution_ids":["https://openalex.org/I189158943"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5046920217","display_name":"Anielle Cristhine de Medeiros Takahashi","orcid":"https://orcid.org/0000-0003-1263-2833"},"institutions":[{"id":"https://openalex.org/I177909021","display_name":"Universidade Federal de S\u00e3o Carlos","ror":"https://ror.org/00qdc6m37","country_code":"BR","type":"education","lineage":["https://openalex.org/I177909021"]}],"countries":["BR"],"is_corresponding":false,"raw_author_name":"Anielle CM Takahashi","raw_affiliation_strings":["Department of Physiotherapy, Federal University of Sao Carlos, Sao Carlos, Brazil"],"affiliations":[{"raw_affiliation_string":"Department of Physiotherapy, Federal University of Sao Carlos, Sao Carlos, Brazil","institution_ids":["https://openalex.org/I177909021"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5027896925","display_name":"Aparecida Maria Catai","orcid":"https://orcid.org/0000-0002-4837-3936"},"institutions":[{"id":"https://openalex.org/I177909021","display_name":"Universidade Federal de S\u00e3o Carlos","ror":"https://ror.org/00qdc6m37","country_code":"BR","type":"education","lineage":["https://openalex.org/I177909021"]}],"countries":["BR"],"is_corresponding":false,"raw_author_name":"Aparecida M Catai","raw_affiliation_strings":["Department of Physiotherapy, Federal University of Sao Carlos, Sao Carlos, Brazil"],"affiliations":[{"raw_affiliation_string":"Department of Physiotherapy, Federal University of Sao Carlos, Sao Carlos, Brazil","institution_ids":["https://openalex.org/I177909021"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5033974415","display_name":"Alberto Porta","orcid":"https://orcid.org/0000-0002-6720-9824"},"institutions":[{"id":"https://openalex.org/I189158943","display_name":"University of Milan","ror":"https://ror.org/00wjc7c48","country_code":"IT","type":"education","lineage":["https://openalex.org/I189158943"]},{"id":"https://openalex.org/I4210099239","display_name":"IRCCS Policlinico San Donato","ror":"https://ror.org/01220jp31","country_code":"IT","type":"healthcare","lineage":["https://openalex.org/I4210099239","https://openalex.org/I4210153126"]}],"countries":["IT"],"is_corresponding":false,"raw_author_name":"Alberto Porta","raw_affiliation_strings":["Department of Biomedical Sciences for Health, University of Milan, Milan, Italy","Department of Cardiothoracic, Vascular Anesthesia and Intensive Care, IRCCS Policlinico San Donato, San Donato Milanese, Milan, Italy"],"affiliations":[{"raw_affiliation_string":"Department of Biomedical Sciences for Health, University of Milan, Milan, Italy","institution_ids":["https://openalex.org/I189158943"]},{"raw_affiliation_string":"Department of Cardiothoracic, Vascular Anesthesia and Intensive Care, IRCCS Policlinico San Donato, San Donato Milanese, Milan, Italy","institution_ids":["https://openalex.org/I4210099239"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":7,"corresponding_author_ids":["https://openalex.org/A5018102991"],"corresponding_institution_ids":["https://openalex.org/I4210099239"],"apc_list":null,"apc_paid":null,"fwci":0.3451,"has_fulltext":false,"cited_by_count":1,"citation_normalized_percentile":{"value":0.44070796,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":94},"biblio":{"volume":null,"issue":null,"first_page":"1","last_page":"4"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10745","display_name":"Heart Rate Variability and Autonomic Control","score":0.9998000264167786,"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"}},"topics":[{"id":"https://openalex.org/T10745","display_name":"Heart Rate Variability and Autonomic Control","score":0.9998000264167786,"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"}},{"id":"https://openalex.org/T10217","display_name":"Cardiac electrophysiology and arrhythmias","score":0.9995999932289124,"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"}},{"id":"https://openalex.org/T11021","display_name":"ECG Monitoring and Analysis","score":0.9973000288009644,"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/qt-interval","display_name":"QT interval","score":0.5849078297615051},{"id":"https://openalex.org/keywords/internal-medicine","display_name":"Internal medicine","score":0.5729237198829651},{"id":"https://openalex.org/keywords/tilt","display_name":"Tilt (camera)","score":0.5559685230255127},{"id":"https://openalex.org/keywords/sympathetic-activity","display_name":"Sympathetic activity","score":0.5027799606323242},{"id":"https://openalex.org/keywords/heart-rate-variability","display_name":"Heart rate variability","score":0.49921560287475586},{"id":"https://openalex.org/keywords/cardiology","display_name":"Cardiology","score":0.44983726739883423},{"id":"https://openalex.org/keywords/electrocardiography","display_name":"Electrocardiography","score":0.44147029519081116},{"id":"https://openalex.org/keywords/medicine","display_name":"Medicine","score":0.3876885175704956},{"id":"https://openalex.org/keywords/heart-rate","display_name":"Heart rate","score":0.2567548155784607},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.16004806756973267},{"id":"https://openalex.org/keywords/blood-pressure","display_name":"Blood pressure","score":0.12348735332489014}],"concepts":[{"id":"https://openalex.org/C118441451","wikidata":"https://www.wikidata.org/wiki/Q12074763","display_name":"QT interval","level":2,"score":0.5849078297615051},{"id":"https://openalex.org/C126322002","wikidata":"https://www.wikidata.org/wiki/Q11180","display_name":"Internal medicine","level":1,"score":0.5729237198829651},{"id":"https://openalex.org/C2779844322","wikidata":"https://www.wikidata.org/wiki/Q2919140","display_name":"Tilt (camera)","level":2,"score":0.5559685230255127},{"id":"https://openalex.org/C3020789104","wikidata":"https://www.wikidata.org/wiki/Q187215","display_name":"Sympathetic activity","level":4,"score":0.5027799606323242},{"id":"https://openalex.org/C71635504","wikidata":"https://www.wikidata.org/wiki/Q933954","display_name":"Heart rate variability","level":4,"score":0.49921560287475586},{"id":"https://openalex.org/C164705383","wikidata":"https://www.wikidata.org/wiki/Q10379","display_name":"Cardiology","level":1,"score":0.44983726739883423},{"id":"https://openalex.org/C2780040984","wikidata":"https://www.wikidata.org/wiki/Q79785","display_name":"Electrocardiography","level":2,"score":0.44147029519081116},{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.3876885175704956},{"id":"https://openalex.org/C2777953023","wikidata":"https://www.wikidata.org/wiki/Q1073121","display_name":"Heart rate","level":3,"score":0.2567548155784607},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.16004806756973267},{"id":"https://openalex.org/C84393581","wikidata":"https://www.wikidata.org/wiki/Q82642","display_name":"Blood pressure","level":2,"score":0.12348735332489014},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.23919/cinc53138.2021.9662902","is_oa":false,"landing_page_url":"https://doi.org/10.23919/cinc53138.2021.9662902","pdf_url":null,"source":{"id":"https://openalex.org/S4363605378","display_name":"2021 Computing in Cardiology (CinC)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"conference"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2021 Computing in Cardiology (CinC)","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":20,"referenced_works":["https://openalex.org/W1976103187","https://openalex.org/W2002228527","https://openalex.org/W2016230869","https://openalex.org/W2045352484","https://openalex.org/W2057887447","https://openalex.org/W2065412048","https://openalex.org/W2077390623","https://openalex.org/W2088720900","https://openalex.org/W2098359894","https://openalex.org/W2124640724","https://openalex.org/W2133589238","https://openalex.org/W2149260358","https://openalex.org/W2158976222","https://openalex.org/W2216281883","https://openalex.org/W2256815008","https://openalex.org/W2305013972","https://openalex.org/W2605464857","https://openalex.org/W2980730233","https://openalex.org/W2990689033","https://openalex.org/W6669904975"],"related_works":["https://openalex.org/W1973180395","https://openalex.org/W2946788172","https://openalex.org/W112050585","https://openalex.org/W2314914269","https://openalex.org/W2405240876","https://openalex.org/W4388811492","https://openalex.org/W2123122680","https://openalex.org/W2906358231","https://openalex.org/W1531145115","https://openalex.org/W1573584236"],"abstract_inverted_index":{"The":[0],"variability":[1,53,61,91,157],"of":[2,5,14,20,41,51,65,74,101,108,187,200,209],"the":[3,6,12,15,18,21,26,46,49,66,72,75,82,94,106,159,170,185,188,191,201,206],"duration":[4],"cardiac":[7,95],"electrical":[8],"activity,":[9],"approximated":[10],"by":[11,57,105],"onset":[13],"Q-wave":[16],"to":[17,32,45,92,122],"end":[19],"T-wave":[22],"(QT),":[23],"computed":[24],"in":[25,81,132,158,190],"low":[27],"frequency":[28],"(LF,":[29],"from":[30,120],"0.04":[31],"0.15":[33],"Hz)":[34],"band,":[35],"is":[36],"utilized":[37],"as":[38,62,98,124,126,167],"a":[39,63,99,176,196],"marker":[40,199],"sympathetic":[42,96,203],"modulation":[43],"directed":[44],"ventricles.":[47],"However,":[48],"magnitude":[50,107],"QT":[52,80,90,123,128,156,210],"might":[54],"be":[55,86,195],"affected":[56],"heart":[58],"period":[59],"(HP)":[60],"consequence":[64,100],"QT-HP":[67],"relation.":[68],"We":[69],"hypothesize":[70],"that":[71,155],"gain":[73,118,186],"relationship":[76],"between":[77],"HP":[78,109,121,130],"and":[79,129,150],"LF":[83,160,192,207],"band":[84,161,193],"could":[85,194],"better":[87],"suited":[88],"than":[89,205],"infer":[93],"control":[97],"its":[102],"intrinsic":[103],"normalization":[104],"changes.":[110],"In":[111],"this":[112],"study":[113],"we":[114],"assessed":[115],"transfer":[116],"function":[117],"(TFG)":[119],"well":[125,168],"spectral":[127],"markers":[131],"23":[133],"healthy":[134],"young":[135],"subjects":[136],"(age":[137],"<tex>$26\\pm":[138],"6$</tex>":[139],"years,":[140],"11":[141],"males)":[142],"undergoing":[143],"head-up":[144],"tilt":[145,178],"test":[146],"at":[147,175],"45&#x00B0;":[148],"(T45)":[149],"90&#x00B0;":[151],"(T90).":[152],"Results":[153],"showed":[154],"increased":[162,166,202],"during":[163,182],"T90.":[164],"TFG":[165,189],"but":[169],"raise":[171],"was":[172],"evident":[173],"also":[174],"lower":[177],"table":[179],"inclination,":[180],"namely":[181],"T45.":[183],"H,":[184],"more":[197],"sensitive":[198],"drive":[204],"power":[208],"variability.":[211]},"counts_by_year":[{"year":2022,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}
