Get quick answers to your questions about the article from our AI researcher chatbot
{'id': 'https://openalex.org/W2082255562', 'doi': 'https://doi.org/10.1016/s1071-9164(99)91195-8', 'title': 'Estimation of left ventricular filling pressure by doppler echocardiography in patients with atrial fibrillation', 'display_name': 'Estimation of left ventricular filling pressure by doppler echocardiography in patients with atrial fibrillation', 'publication_year': 1999, 'publication_date': '1999-09-01', 'ids': {'openalex': 'https://openalex.org/W2082255562', 'doi': 'https://doi.org/10.1016/s1071-9164(99)91195-8', 'mag': '2082255562'}, 'language': 'en', 'primary_location': {'is_oa': False, 'landing_page_url': 'https://doi.org/10.1016/s1071-9164(99)91195-8', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S67869649', 'display_name': 'Journal of Cardiac Failure', 'issn_l': '1071-9164', 'issn': ['1071-9164', '1532-8414'], 'is_oa': False, 'is_in_doaj': False, 'is_indexed_in_scopus': True, 'is_core': True, 'host_organization': 'https://openalex.org/P4310320990', 'host_organization_name': 'Elsevier BV', 'host_organization_lineage': ['https://openalex.org/P4310320990'], 'host_organization_lineage_names': ['Elsevier BV'], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}, 'type': 'article', 'type_crossref': 'journal-article', 'indexed_in': ['crossref'], 'open_access': {'is_oa': False, 'oa_status': 'closed', 'oa_url': None, 'any_repository_has_fulltext': False}, 'authorships': [{'author_position': 'first', 'author': {'id': 'https://openalex.org/A5027143794', 'display_name': 'Hideaki Okubo', 'orcid': None}, 'institutions': [], 'countries': [], 'is_corresponding': False, 'raw_author_name': 'Hideaki Okubo', 'raw_affiliation_strings': [], 'affiliations': []}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5026845589', 'display_name': 'Hideyuki Takaoka', 'orcid': None}, 'institutions': [], 'countries': [], 'is_corresponding': False, 'raw_author_name': 'Hideyuki Takaoka', 'raw_affiliation_strings': [], 'affiliations': []}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5103579089', 'display_name': 'Katsuya Hata', 'orcid': None}, 'institutions': [], 'countries': [], 'is_corresponding': False, 'raw_author_name': 'Katsuya Hata', 'raw_affiliation_strings': [], 'affiliations': []}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5064923028', 'display_name': 'Hiroya Kawai', 'orcid': 'https://orcid.org/0000-0003-4784-8212'}, 'institutions': [], 'countries': [], 'is_corresponding': False, 'raw_author_name': 'Hiroya Kawai', 'raw_affiliation_strings': [], 'affiliations': []}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5003215238', 'display_name': 'Toshiro Shinke', 'orcid': 'https://orcid.org/0000-0001-7349-7538'}, 'institutions': [], 'countries': [], 'is_corresponding': False, 'raw_author_name': 'Toshiro Shinke', 'raw_affiliation_strings': [], 'affiliations': []}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5003782008', 'display_name': 'Keisuke Kawai', 'orcid': 'https://orcid.org/0000-0001-6691-5850'}, 'institutions': [], 'countries': [], 'is_corresponding': False, 'raw_author_name': 'Keisuke Kawai', 'raw_affiliation_strings': [], 'affiliations': []}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5112312549', 'display_name': 'Yoichi Kijima', 'orcid': None}, 'institutions': [], 'countries': [], 'is_corresponding': False, 'raw_author_name': 'Yoichi Kijima', 'raw_affiliation_strings': [], 'affiliations': []}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5032547605', 'display_name': 'Takeomi Murata', 'orcid': None}, 'institutions': [], 'countries': [], 'is_corresponding': False, 'raw_author_name': 'Takeomi Murata', 'raw_affiliation_strings': [], 'affiliations': []}, {'author_position': 'last', 'author': {'id': 'https://openalex.org/A5111616696', 'display_name': 'Mitsuhiro Yokoyama', 'orcid': None}, 'institutions': [], 'countries': [], 'is_corresponding': False, 'raw_author_name': 'Mitsuhiro Yokoyama', 'raw_affiliation_strings': [], 'affiliations': []}], 'institution_assertions': [], 'countries_distinct_count': 0, 'institutions_distinct_count': 0, 'corresponding_author_ids': [], 'corresponding_institution_ids': [], 'apc_list': {'value': 3390, 'currency': 'USD', 'value_usd': 3390, 'provenance': 'doaj'}, 'apc_paid': None, 'fwci': 0.0, 'has_fulltext': True, 'fulltext_origin': 'ngrams', 'cited_by_count': 0, 'citation_normalized_percentile': {'value': 0.0, 'is_in_top_1_percent': False, 'is_in_top_10_percent': False}, 'cited_by_percentile_year': {'min': 0, 'max': 56}, 'biblio': {'volume': '5', 'issue': '3', 'first_page': '58', 'last_page': '58'}, 'is_retracted': False, 'is_paratext': False, 'primary_topic': {'id': 'https://openalex.org/T10821', 'display_name': 'Cardiovascular Function and Risk Factors', 'score': 0.994, '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/T10821', 'display_name': 'Cardiovascular Function and Risk Factors', 'score': 0.994, '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/T10372', 'display_name': 'Cardiac Imaging and Diagnostics', 'score': 0.9606, 'subfield': {'id': 'https://openalex.org/subfields/2741', 'display_name': 'Radiology, Nuclear Medicine and Imaging'}, '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/T10065', 'display_name': 'Atrial Fibrillation Management and Outcomes', 'score': 0.9408, '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/left-atrial-pressure', 'display_name': 'Left atrial pressure', 'score': 0.6689366}, {'id': 'https://openalex.org/keywords/ventricular-filling', 'display_name': 'Ventricular filling', 'score': 0.55822325}, {'id': 'https://openalex.org/keywords/ventricular-pressure', 'display_name': 'Ventricular pressure', 'score': 0.46117178}], 'concepts': [{'id': 'https://openalex.org/C71924100', 'wikidata': 'https://www.wikidata.org/wiki/Q11190', 'display_name': 'Medicine', 'level': 0, 'score': 0.96732855}, {'id': 'https://openalex.org/C164705383', 'wikidata': 'https://www.wikidata.org/wiki/Q10379', 'display_name': 'Cardiology', 'level': 1, 'score': 0.8254584}, {'id': 'https://openalex.org/C126322002', 'wikidata': 'https://www.wikidata.org/wiki/Q11180', 'display_name': 'Internal medicine', 'level': 1, 'score': 0.816358}, {'id': 'https://openalex.org/C2779161974', 'wikidata': 'https://www.wikidata.org/wiki/Q815819', 'display_name': 'Atrial fibrillation', 'level': 2, 'score': 0.7011836}, {'id': 'https://openalex.org/C2909919940', 'wikidata': 'https://www.wikidata.org/wiki/Q1414127', 'display_name': 'Left atrial pressure', 'level': 3, 'score': 0.6689366}, {'id': 'https://openalex.org/C2780346441', 'wikidata': 'https://www.wikidata.org/wiki/Q55609890', 'display_name': 'Doppler echocardiography', 'level': 4, 'score': 0.649444}, {'id': 'https://openalex.org/C3019211846', 'wikidata': 'https://www.wikidata.org/wiki/Q492905', 'display_name': 'Ventricular filling', 'level': 4, 'score': 0.55822325}, {'id': 'https://openalex.org/C26635844', 'wikidata': 'https://www.wikidata.org/wiki/Q2002035', 'display_name': 'Ventricular pressure', 'level': 3, 'score': 0.46117178}, {'id': 'https://openalex.org/C84393581', 'wikidata': 'https://www.wikidata.org/wiki/Q82642', 'display_name': 'Blood pressure', 'level': 2, 'score': 0.29028034}, {'id': 'https://openalex.org/C57900726', 'wikidata': 'https://www.wikidata.org/wiki/Q492905', 'display_name': 'Diastole', 'level': 3, 'score': 0.09605718}], 'mesh': [], 'locations_count': 1, 'locations': [{'is_oa': False, 'landing_page_url': 'https://doi.org/10.1016/s1071-9164(99)91195-8', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S67869649', 'display_name': 'Journal of Cardiac Failure', 'issn_l': '1071-9164', 'issn': ['1071-9164', '1532-8414'], 'is_oa': False, 'is_in_doaj': False, 'is_indexed_in_scopus': True, 'is_core': True, 'host_organization': 'https://openalex.org/P4310320990', 'host_organization_name': 'Elsevier BV', 'host_organization_lineage': ['https://openalex.org/P4310320990'], 'host_organization_lineage_names': ['Elsevier BV'], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}], 'best_oa_location': None, 'sustainable_development_goals': [], 'grants': [], 'datasets': [], 'versions': [], 'referenced_works_count': 0, 'referenced_works': [], 'related_works': ['https://openalex.org/W70133419', 'https://openalex.org/W595945792', 'https://openalex.org/W2919967494', 'https://openalex.org/W2885553223', 'https://openalex.org/W2751005821', 'https://openalex.org/W2199756077', 'https://openalex.org/W2082255562', 'https://openalex.org/W2061209182', 'https://openalex.org/W2027275963', 'https://openalex.org/W2016735462'], 'abstract_inverted_index': None, 'cited_by_api_url': 'https://api.openalex.org/works?filter=cites:W2082255562', 'counts_by_year': [], 'updated_date': '2025-01-22T02:18:07.247333', 'created_date': '2016-06-24'}