{"id":"https://openalex.org/A5004635384","orcid":"https://orcid.org/0009-0003-3128-8991","observed_orcids":["https://orcid.org/0009-0003-3128-8991"],"display_name":"Kyoko Koyama","raw_author_names":["Kyoko Koyama"],"full_name":"Kyoko Koyama","works_count":7,"cited_by_count":8,"summary_stats":{"2yr_mean_citedness":0.0,"h_index":2,"i10_index":0},"ids":{"openalex":"https://openalex.org/A5004635384","orcid":"https://orcid.org/0009-0003-3128-8991","observed_orcids":["https://orcid.org/0009-0003-3128-8991"]},"affiliations":[{"institution":{"id":"https://openalex.org/I112524849","ror":"https://ror.org/00xy44n04","display_name":"Yamagata University","country_code":"JP","type":"education","lineage":["https://openalex.org/I112524849"]},"years":[2026,2025,2024,2023,2021]},{"institution":{"id":"https://openalex.org/I4210165438","ror":"https://ror.org/05gg4qm19","display_name":"Yamagata University Hospital","country_code":"JP","type":"healthcare","lineage":["https://openalex.org/I4210165438"]},"years":[2026,2025,2024,2023,2021]}],"last_known_institutions":[{"id":"https://openalex.org/I112524849","ror":"https://ror.org/00xy44n04","display_name":"Yamagata University","country_code":"JP","type":"education","lineage":["https://openalex.org/I112524849"]},{"id":"https://openalex.org/I4210165438","ror":"https://ror.org/05gg4qm19","display_name":"Yamagata University Hospital","country_code":"JP","type":"healthcare","lineage":["https://openalex.org/I4210165438"]}],"topics":[{"id":"https://openalex.org/T10065","display_name":"Atrial Fibrillation Management and Outcomes","count":4,"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/T10598","display_name":"Cardiac pacing and defibrillation studies","count":4,"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/T11217","display_name":"Cardiac Arrhythmias and Treatments","count":4,"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/T11355","display_name":"Inflammatory Biomarkers in Disease Prognosis","count":2,"subfield":{"id":"https://openalex.org/subfields/2730","display_name":"Oncology"},"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/T10193","display_name":"Coronary Interventions and Diagnostics","count":1,"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"}}],"topic_share":[{"id":"https://openalex.org/T10065","display_name":"Atrial Fibrillation Management and Outcomes","value":1.63e-05,"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/T10598","display_name":"Cardiac pacing and defibrillation studies","value":1.43e-05,"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/T11355","display_name":"Inflammatory Biomarkers in Disease Prognosis","value":1.4e-05,"subfield":{"id":"https://openalex.org/subfields/2730","display_name":"Oncology"},"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/T11217","display_name":"Cardiac Arrhythmias and Treatments","value":1.2e-05,"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/T11139","display_name":"Gout, Hyperuricemia, Uric Acid","value":8.9e-06,"subfield":{"id":"https://openalex.org/subfields/2727","display_name":"Nephrology"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}}],"x_concepts":[{"id":"71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","score":0.9617999792098999},{"id":"2779161974","wikidata":"https://www.wikidata.org/wiki/Q815819","display_name":"Atrial fibrillation","score":0.8190000057220459},{"id":"164705383","wikidata":"https://www.wikidata.org/wiki/Q10379","display_name":"Cardiology","score":0.8140100240707397},{"id":"126322002","wikidata":"https://www.wikidata.org/wiki/Q11180","display_name":"Internal medicine","score":0.8042610883712769},{"id":"2778198053","wikidata":"https://www.wikidata.org/wiki/Q181754","display_name":"Heart failure","score":0.6449873447418213}],"counts_by_year":[{"year":2021,"works_count":1,"oa_works_count":1,"cited_by_count":1},{"year":2023,"works_count":3,"oa_works_count":2,"cited_by_count":7},{"year":2024,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2025,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2026,"works_count":1,"oa_works_count":1,"cited_by_count":0}],"display_name_alternatives":["Kyoko Koyama"],"block_key":"k koyama","works_api_url":"https://api.openalex.org/works?filter=author.id:A5004635384","updated_date":"2026-10-10T12:59:14","created_date":"2025-10-10T00:00:00"}