Get quick answers to your questions about the article from our AI researcher chatbot
{'id': 'https://openalex.org/W1979801289', 'doi': 'https://doi.org/10.1161/01.cir.102.24.e182', 'title': 'Ventilatory and Heart Rate Responses to Exercise: Better Predictors of Heart Failure Mortality Than Peak Exercise Oxygen Consumption', 'display_name': 'Ventilatory and Heart Rate Responses to Exercise: Better Predictors of Heart Failure Mortality Than Peak Exercise Oxygen Consumption', 'publication_year': 2000, 'publication_date': '2000-12-12', 'ids': {'openalex': 'https://openalex.org/W1979801289', 'doi': 'https://doi.org/10.1161/01.cir.102.24.e182', 'mag': '1979801289', 'pmid': 'https://pubmed.ncbi.nlm.nih.gov/11113059'}, 'language': 'en', 'primary_location': {'is_oa': True, 'landing_page_url': 'https://doi.org/10.1161/01.cir.102.24.e182', 'pdf_url': 'https://www.ahajournals.org/doi/pdf/10.1161/01.CIR.102.24.e182', 'source': {'id': 'https://openalex.org/S116251202', 'display_name': 'Circulation', 'issn_l': '0009-7322', 'issn': ['0009-7322', '1524-4539'], 'is_oa': False, 'is_in_doaj': False, 'is_core': True, 'host_organization': 'https://openalex.org/P4310315671', 'host_organization_name': 'Lippincott Williams & Wilkins', 'host_organization_lineage': ['https://openalex.org/P4310315671', 'https://openalex.org/P4310318547'], 'host_organization_lineage_names': ['Lippincott Williams & Wilkins', 'Wolters Kluwer'], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, 'type': 'letter', 'type_crossref': 'journal-article', 'indexed_in': ['crossref', 'pubmed'], 'open_access': {'is_oa': True, 'oa_status': 'bronze', 'oa_url': 'https://www.ahajournals.org/doi/pdf/10.1161/01.CIR.102.24.e182', 'any_repository_has_fulltext': False}, 'authorships': [{'author_position': 'first', 'author': {'id': 'https://openalex.org/A5046225534', 'display_name': 'Guy A. MacGowan', 'orcid': 'https://orcid.org/0000-0002-2685-4165'}, 'institutions': [{'id': 'https://openalex.org/I4210134769', 'display_name': 'University of Pittsburgh Medical Center', 'ror': 'https://ror.org/04ehecz88', 'country_code': 'US', 'type': 'healthcare', 'lineage': ['https://openalex.org/I4210098814', 'https://openalex.org/I4210134769']}], 'countries': ['US'], 'is_corresponding': False, 'raw_author_name': 'Guy A. MacGowan', 'raw_affiliation_strings': ['Guy A. MacGowan Section of Heart Failure and Transplantation Cardiology, Cardiovascular Institute of the University of Pittsburgh Medical Center, 200 Lothrop Street, Pittsburgh, PA 15213'], 'affiliations': [{'raw_affiliation_string': 'Guy A. MacGowan Section of Heart Failure and Transplantation Cardiology, Cardiovascular Institute of the University of Pittsburgh Medical Center, 200 Lothrop Street, Pittsburgh, PA 15213', 'institution_ids': ['https://openalex.org/I4210134769']}]}, {'author_position': 'last', 'author': {'id': 'https://openalex.org/A5111843549', 'display_name': 'Srinivas Murali', 'orcid': None}, 'institutions': [{'id': 'https://openalex.org/I4210134769', 'display_name': 'University of Pittsburgh Medical Center', 'ror': 'https://ror.org/04ehecz88', 'country_code': 'US', 'type': 'healthcare', 'lineage': ['https://openalex.org/I4210098814', 'https://openalex.org/I4210134769']}], 'countries': ['US'], 'is_corresponding': False, 'raw_author_name': 'Srinivas Murali', 'raw_affiliation_strings': ['Srinivas Murali Section of Heart Failure and Transplantation Cardiology, Cardiovascular Institute of the University of Pittsburgh Medical Center, 200 Lothrop Street, Pittsburgh, PA 15213'], 'affiliations': [{'raw_affiliation_string': 'Srinivas Murali Section of Heart Failure and Transplantation Cardiology, Cardiovascular Institute of the University of Pittsburgh Medical Center, 200 Lothrop Street, Pittsburgh, PA 15213', 'institution_ids': ['https://openalex.org/I4210134769']}]}], 'institution_assertions': [], 'countries_distinct_count': 1, 'institutions_distinct_count': 1, 'corresponding_author_ids': [], 'corresponding_institution_ids': [], 'apc_list': None, 'apc_paid': None, 'fwci': None, 'has_fulltext': True, 'fulltext_origin': 'pdf', 'cited_by_count': 240, 'citation_normalized_percentile': {'value': 0.98374, 'is_in_top_1_percent': False, 'is_in_top_10_percent': True}, 'cited_by_percentile_year': {'min': 98, 'max': 99}, 'biblio': {'volume': '102', 'issue': '24', 'first_page': None, 'last_page': None}, 'is_retracted': False, 'is_paratext': False, 'primary_topic': {'id': 'https://openalex.org/T11209', 'display_name': 'Cardiovascular and exercise physiology', 'score': 0.9999, 'subfield': {'id': 'https://openalex.org/subfields/2707', 'display_name': 'Complementary and alternative 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/T11209', 'display_name': 'Cardiovascular and exercise physiology', 'score': 0.9999, 'subfield': {'id': 'https://openalex.org/subfields/2707', 'display_name': 'Complementary and alternative 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/T10745', 'display_name': 'Heart Rate Variability and Autonomic Control', 'score': 0.9994, '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/T10198', 'display_name': 'Heart Failure Treatment and Management', 'score': 0.989, '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/physical-exercise', 'display_name': 'Physical exercise', 'score': 0.42105937}], 'concepts': [{'id': 'https://openalex.org/C71924100', 'wikidata': 'https://www.wikidata.org/wiki/Q11190', 'display_name': 'Medicine', 'level': 0, 'score': 0.9480563}, {'id': 'https://openalex.org/C2778198053', 'wikidata': 'https://www.wikidata.org/wiki/Q181754', 'display_name': 'Heart failure', 'level': 2, 'score': 0.7780858}, {'id': 'https://openalex.org/C164705383', 'wikidata': 'https://www.wikidata.org/wiki/Q10379', 'display_name': 'Cardiology', 'level': 1, 'score': 0.65381557}, {'id': 'https://openalex.org/C2777953023', 'wikidata': 'https://www.wikidata.org/wiki/Q1073121', 'display_name': 'Heart rate', 'level': 3, 'score': 0.63655037}, {'id': 'https://openalex.org/C126322002', 'wikidata': 'https://www.wikidata.org/wiki/Q11180', 'display_name': 'Internal medicine', 'level': 1, 'score': 0.5549362}, {'id': 'https://openalex.org/C196310339', 'wikidata': 'https://www.wikidata.org/wiki/Q60354', 'display_name': 'VO2 max', 'level': 4, 'score': 0.49398094}, {'id': 'https://openalex.org/C181588539', 'wikidata': 'https://www.wikidata.org/wiki/Q219067', 'display_name': 'Physical exercise', 'level': 2, 'score': 0.42105937}, {'id': 'https://openalex.org/C540031477', 'wikidata': 'https://www.wikidata.org/wiki/Q629', 'display_name': 'Oxygen', 'level': 2, 'score': 0.41250196}, {'id': 'https://openalex.org/C1862650', 'wikidata': 'https://www.wikidata.org/wiki/Q186005', 'display_name': 'Physical therapy', 'level': 1, 'score': 0.34817988}, {'id': 'https://openalex.org/C84393581', 'wikidata': 'https://www.wikidata.org/wiki/Q82642', 'display_name': 'Blood pressure', 'level': 2, 'score': 0.12727502}, {'id': 'https://openalex.org/C185592680', 'wikidata': 'https://www.wikidata.org/wiki/Q2329', 'display_name': 'Chemistry', 'level': 0, 'score': 0.0}, {'id': 'https://openalex.org/C178790620', 'wikidata': 'https://www.wikidata.org/wiki/Q11351', 'display_name': 'Organic chemistry', 'level': 1, 'score': 0.0}], 'mesh': [{'descriptor_ui': 'D006333', 'descriptor_name': 'Heart Failure', 'qualifier_ui': 'Q000175', 'qualifier_name': 'diagnosis', 'is_major_topic': True}, {'descriptor_ui': 'D006339', 'descriptor_name': 'Heart Rate', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': True}, {'descriptor_ui': 'D005082', 'descriptor_name': 'Physical Exertion', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': True}, {'descriptor_ui': 'D006333', 'descriptor_name': 'Heart Failure', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D006333', 'descriptor_name': 'Heart Failure', 'qualifier_ui': 'Q000503', 'qualifier_name': 'physiopathology', 'is_major_topic': False}, {'descriptor_ui': 'D006333', 'descriptor_name': 'Heart Failure', 'qualifier_ui': 'Q000401', 'qualifier_name': 'mortality', 'is_major_topic': False}, {'descriptor_ui': 'D006801', 'descriptor_name': 'Humans', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D010101', 'descriptor_name': 'Oxygen Consumption', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D011237', 'descriptor_name': 'Predictive Value of Tests', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D012129', 'descriptor_name': 'Respiratory Function Tests', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}], 'locations_count': 2, 'locations': [{'is_oa': True, 'landing_page_url': 'https://doi.org/10.1161/01.cir.102.24.e182', 'pdf_url': 'https://www.ahajournals.org/doi/pdf/10.1161/01.CIR.102.24.e182', 'source': {'id': 'https://openalex.org/S116251202', 'display_name': 'Circulation', 'issn_l': '0009-7322', 'issn': ['0009-7322', '1524-4539'], 'is_oa': False, 'is_in_doaj': False, 'is_core': True, 'host_organization': 'https://openalex.org/P4310315671', 'host_organization_name': 'Lippincott Williams & Wilkins', 'host_organization_lineage': ['https://openalex.org/P4310315671', 'https://openalex.org/P4310318547'], 'host_organization_lineage_names': ['Lippincott Williams & Wilkins', 'Wolters Kluwer'], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, {'is_oa': False, 'landing_page_url': 'https://pubmed.ncbi.nlm.nih.gov/11113059', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S4306525036', 'display_name': 'PubMed', 'issn_l': None, 'issn': None, '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': ['National Institutes of Health'], 'type': 'repository'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}], 'best_oa_location': {'is_oa': True, 'landing_page_url': 'https://doi.org/10.1161/01.cir.102.24.e182', 'pdf_url': 'https://www.ahajournals.org/doi/pdf/10.1161/01.CIR.102.24.e182', 'source': {'id': 'https://openalex.org/S116251202', 'display_name': 'Circulation', 'issn_l': '0009-7322', 'issn': ['0009-7322', '1524-4539'], 'is_oa': False, 'is_in_doaj': False, 'is_core': True, 'host_organization': 'https://openalex.org/P4310315671', 'host_organization_name': 'Lippincott Williams & Wilkins', 'host_organization_lineage': ['https://openalex.org/P4310315671', 'https://openalex.org/P4310318547'], 'host_organization_lineage_names': ['Lippincott Williams & Wilkins', 'Wolters Kluwer'], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, 'sustainable_development_goals': [{'id': 'https://metadata.un.org/sdg/3', 'score': 0.85, 'display_name': 'Good health and well-being'}], 'grants': [], 'datasets': [], 'versions': [], 'referenced_works_count': 24, 'referenced_works': ['https://openalex.org/W1928996901', 'https://openalex.org/W1967985180', 'https://openalex.org/W1976986448', 'https://openalex.org/W1985106459', 'https://openalex.org/W1993505573', 'https://openalex.org/W2001280125', 'https://openalex.org/W200617971', 'https://openalex.org/W2008924206', 'https://openalex.org/W2016709367', 'https://openalex.org/W2028960923', 'https://openalex.org/W2045710135', 'https://openalex.org/W2057558364', 'https://openalex.org/W2075778690', 'https://openalex.org/W2087407895', 'https://openalex.org/W2115403839', 'https://openalex.org/W2126629551', 'https://openalex.org/W2145139856', 'https://openalex.org/W2154572616', 'https://openalex.org/W2164269479', 'https://openalex.org/W2167503640', 'https://openalex.org/W2413343869', 'https://openalex.org/W2460661924', 'https://openalex.org/W2922117482', 'https://openalex.org/W571868106'], 'related_works': ['https://openalex.org/W642714463', 'https://openalex.org/W588655279', 'https://openalex.org/W55173076', 'https://openalex.org/W44894489', 'https://openalex.org/W2383994333', 'https://openalex.org/W2164703220', 'https://openalex.org/W2099628268', 'https://openalex.org/W2067583938', 'https://openalex.org/W1992046973', 'https://openalex.org/W1494789307'], 'abstract_inverted_index': {'HomeCirculationVol.': [0], '102,': [1, 1471], 'No.': [2], '24Ventilatory': [3], 'and': [4, 36, 56, 68, 86, 94, 133, 201, 229, 247, 282, 400, 519, 577, 607, 637, 644, 657, 698, 728, 762, 775, 780, 812, 829, 856, 893, 910, 941, 948, 960, 966, 987, 1023, 1056, 1102, 1140, 1175, 1206, 1221, 1244, 1261, 1281, 1297, 1322, 1337, 1365, 1371, 1396, 1441], 'Heart': [5, 13, 37, 45, 66, 92, 832, 839, 870, 917, 920, 1070, 1250, 1344, 1383, 1458, 1480], 'Rate': [6, 38], 'Responses': [7, 39], 'to': [8, 26, 40, 169, 187, 221, 362, 388, 407, 428, 523, 584, 668, 690, 709, 907, 998, 1115, 1448], 'Exercise:': [9, 41], 'Better': [10, 42], 'Predictors': [11, 43], 'of': [12, 44, 65, 73, 76, 91, 99, 102, 231, 263, 274, 303, 315, 411, 441, 452, 478, 490, 502, 527, 547, 555, 580, 659, 739, 744, 767, 818, 831, 862, 876, 963, 995, 1010, 1029, 1041, 1063, 1122, 1145, 1158, 1181, 1193, 1211, 1215, 1229, 1249, 1257, 1288, 1302, 1327, 1334, 1347, 1402, 1421], 'Failure': [14, 46, 67, 93, 833, 1251], 'Mortality': [15, 47], 'Than': [16, 48], 'Peak': [17, 49, 945, 1258, 1335, 1369], 'Exercise': [18, 50, 732, 824, 864, 903], 'Oxygen': [19, 51, 946, 1117, 1259], 'Consumption': [20, 52, 947, 1260], 'Free': [21], 'AccessLetterPDF/EPUBAboutView': [22], 'PDFView': [23], 'EPUBSections': [24], 'ToolsAdd': [25], 'favoritesDownload': [27], 'citationsTrack': [28], 'citationsPermissions': [29], 'ShareShare': [30], 'onFacebookTwitterLinked': [31], 'InMendeleyRedditDiggEmail': [32], 'Jump': [33], 'toFree': [34], 'AccessLetterPDF/EPUBVentilatory': [35], 'Guy': [53, 59], 'A.': [54, 60, 62], 'MacGowan': [55, 63, 596, 643], 'Srinivas': [57, 87], 'Murali': [58, 89, 645], 'MacGowanGuy': [61], 'Section': [64, 90], 'Transplantation': [69, 95], 'Cardiology,': [70, 96, 971, 1011, 1042, 1159, 1194, 1230], 'Cardiovascular': [71, 97, 1303, 1422], 'Institute': [72, 98], 'the': [74, 100, 117, 123, 171, 222, 232, 301, 306, 327, 409, 434, 439, 453, 500, 581, 663, 687, 776, 949, 999, 1116, 1212, 1254, 1331, 1338, 1449], 'University': [75, 101, 440], 'Pittsburgh': [77, 103, 442], 'Medical': [78, 104, 443], 'Center,': [79, 105], '200': [80, 106], 'Lothrop': [81, 107], 'Street,': [82, 108], 'Pittsburgh,': [83, 109], 'PA': [84, 110], '15213': [85, 111], 'MuraliSrinivas': [88], 'Originally': [112, 1482], 'published12': [113], 'Dec': [114], '2000https://doi.org/10.1161/01.CIR.102.24.e182Circulation.': [115], '2000;102:e182To': [116], 'Editor:We': [118], 'read': [119], 'with': [120, 240, 271, 278, 354, 374, 423, 504, 561, 655, 677, 736, 834, 868, 1005, 1066, 1188, 1224, 1376, 1415], 'great': [121], 'interest': [122], 'article': [124, 233], 'by': [125, 197, 234, 379, 469, 1478], 'Robbins': [126, 147, 235, 296, 340, 380, 510, 620], 'et': [127, 148, 236, 297, 341, 381, 516, 544, 573, 602], 'al1': [128, 149, 298, 342], 'describing': [129], 'how': [130], 'exercise-related': [131, 158, 418, 456], 'ventilatory': [132, 159, 183, 199, 419, 457, 582, 605, 666, 688, 740, 996], 'heart': [134, 139, 191, 464, 506, 520, 528, 562, 588, 611, 679, 1006, 1037, 1154, 1189, 1225, 1293, 1377, 1416], 'rate': [135, 262, 521], 'responses': [136, 406, 420, 458, 522, 667], 'better': [137, 334, 525], 'predict': [138], 'failure': [140, 465, 529, 1417], 'mortality': [141, 261, 273, 316, 355, 373, 530], 'than': [142, 335, 531], 'peak': [143, 202, 249, 284, 320, 338, 424, 470, 532, 548], 'exercise': [144, 203, 250, 285, 425, 471, 549, 585, 669, 691, 1034, 1148, 1217, 1290, 1409], 'oxygen': [145, 204, 251, 286, 426, 472, 533, 550], 'consumption.2Although': [146], 'correctly': [150], 'state': [151, 299, 344], 'that': [152, 157, 173, 182, 196, 300, 345, 447, 455, 467, 493, 651, 665], 'other': [153], 'investigators': [154], 'have': [155, 416, 495], 'shown': [156], 'abnormalities': [160, 184, 200, 606], 'can': [161], 'be': [162, 215, 671], 'useful': [163], 'in': [164, 189, 225, 276, 372, 421, 463, 558, 586, 609, 692, 699, 734, 783, 822, 866, 916, 956, 1003, 1036, 1069, 1075, 1153, 1186, 1292, 1341, 1374, 1413, 1455], 'predicting': [165], 'mortality,3': [166], 'they': [167, 391], 'fail': [168], 'acknowledge': [170], 'fact': [172], 'our': [174, 365, 693, 700], 'group4': [175], 'previously': [176, 481], 'published': [177, 413, 482], 'similar': [178, 220, 387], 'findings,': [179], 'which': [180], 'demonstrated': [181, 195], 'were': [185], 'related': [186], 'outcome': [188, 333], 'congestive': [190, 505, 610], 'failure.': [192, 507, 563, 589, 680], 'Importantly,': [193], 'we': [194, 258, 415], 'combining': [198], 'consumption,': [205], 'patients': [206, 239, 277, 503, 560, 676, 735, 1004, 1187, 1223, 1375], 'at': [207, 305, 319, 326, 337, 438], 'a': [208, 248, 260, 272, 279, 283, 313, 348, 369, 384, 396, 448, 475, 496, 1379], 'particularly': [209], 'high': [210], 'risk': [211], 'for': [212, 394, 401, 431, 433, 552, 646, 704, 826], 'death': [213], 'could': [214], 'identified.': [216], 'These': [217], 'findings': [218], 'are': [219, 682], 'data': [223, 366, 403], 'presented': [224], 'Figures': [226], '1,': [227], '5,': [228], '7': [230], 'al.1': [237], 'In': [238, 294], 'minute': [241], 'ventilation/carbon': [242], 'dioxide': [243, 1032, 1185], 'production': [244], '(V̇e/V̇co2)': [245], '>50': [246], 'consumption': [252, 287, 427, 473, 551], '<15': [253, 288], 'mL': [254, 289], '·': [255, 290, 292], 'kg−1·': [256], 'min−1,': [257], 'described': [259], '82%': [264], '(median': [265], 'follow-up': [266, 385], 'time,': [267], '552±329': [268], 'days)': [269], 'compared': [270], '22%': [275], 'V̇e/V̇co2': [280, 304, 318, 325, 336, 352], '<50': [281], 'kg−1': [291], 'min−1.': [293], 'addition,': [295], 'value': [302, 994, 1028, 1180, 1214], 'anaerobic': [307, 328], 'threshold': [308, 349], 'was': [309, 347], 'almost': [310], 'as': [311, 317, 358], 'strong': [312], 'predictor': [314], 'exercise.': [321, 339], 'We': [322, 445, 649, 681], 'also': [323, 683], 'used': [324, 417], 'threshold4': [329], 'because': [330], 'it': [331], 'predicted': [332], 'further': [343], 'there': [346], 'phenomenon': [350], 'regarding': [351, 404, 702], 'values,': [353], 'increasing': [356], 'markedly': [357], 'values': [359, 375], 'exceeded': [360], '40': [361], '45.': [363], 'Similarly,': [364], 'clearly': [367], 'show': [368], 'marked': [370], 'increase': [371], '>50.': [376], 'The': [377, 816, 991, 1060, 1106], 'study': [378], 'al2': [382], 'had': [383], 'period': [386], 'ours;': [389], 'however,': [390], 'deserve': [392], 'credit': [393], 'studying': [395], 'larger': [397], 'patient': [398], 'population': [399], 'analyzing': [402], 'chronotropic': [405], 'exercise.On': [408], 'basis': [410], 'these': [412], 'data,4': [414], 'conjunction': [422], 'evaluate': [429], 'candidates': [430], 'transplantation': [432, 557], 'past': [435, 1147], '3': [436], 'years': [437], 'Center.': [444], 'believe': [446], 'proper': [449], 'scientific': [450], 'evaluation': [451], 'hypothesis': [454], 'provide': [459], 'additional': [460], 'prognostic': [461, 578, 993, 1151, 1213, 1380], 'information': [462], 'beyond': [466], 'provided': [468], 'requires': [474], 'full': [476], 'recognition': [477], 'all': [479], 'pertinent,': [480], 'studies.': [483], 'Clearly,': [484], 'this': [485], 'is': [486, 1112], 'an': [487, 772], 'important': [488], 'area': [489], 'clinical': [491], 'research': [492], 'may': [494], 'substantial': [497], 'impact': [498], 'on': [499, 899, 1150, 1253, 1330], 'management': [501], 'References': [508], '1': [509], 'M,': [511, 715, 809, 884, 888, 932, 936, 976, 982, 1053, 1093, 1170, 1203, 1278], 'Francis': [512, 638], 'G,': [513], 'Pashkow': [514, 623], 'FJ,': [515], 'al.': [517, 545, 574, 603], 'Ventilatory': [518, 1064], 'exercise:': [524], 'predictors': [526], 'consumption.': [534], 'Circulation.1999;': [535], '100:2411–2417.CrossrefMedlineGoogle': [536], 'Scholar2': [537], 'Mancini': [538], 'DM,': [539], 'Eisen': [540], 'H,': [541], 'Kussmaul': [542], 'W,': [543], 'Value': [546, 1062, 1256, 1333], 'optimal': [553], 'timing': [554], 'cardiac': [556, 705], 'ambulatory': [559], 'Circulation.1991;': [564], '83:778–786.>CrossrefMedlineGoogle': [565], 'Scholar3': [566], 'Chua': [567], 'TP,': [568], 'Ponikowksi': [569], 'P,': [570, 719, 795, 849, 1099], 'Harrington': [571], 'D,': [572, 801, 853, 890, 984, 1097], 'Clinical': [575, 877], 'correlates': [576], 'significance': [579], 'response': [583, 689], 'chronic': [587], 'J': [590, 1025, 1055, 1058, 1208, 1243, 1280], 'Am': [591], 'Coll': [592], 'Cardiol.1997;': [593], '29:1585–1590.CrossrefMedlineGoogle': [594], 'Scholar4': [595], 'GA,': [597], 'Janosko': [598], 'K,': [599, 934], 'Cecchetti': [600], 'A,': [601, 803, 851, 930], 'Exercise-related': [604], 'survival': [608], 'failureGoogle': [612], 'ScholarcirculationahaCirculationCirculationCirculation0009-73221524-4539Lippincott': [613], 'Williams': [614], '&': [615, 1073, 1077, 1305, 1424], 'WilkinsResponseLauer': [616], 'Michael': [617], 'S.,': [618], 'MD,': [619, 622, 625, 636], 'Mark,': [621], 'Fredric,': [624], 'Hoercher': [626], 'Kathy,': [627], 'RN,': [628], 'Snader': [629], 'Claire': [630], 'E.,': [631], 'MA,': [632], 'Young': [633], 'James': [634], 'B.,': [635], 'Gary,': [639], 'MD12122000We': [640], 'thank': [641], 'Drs': [642], 'their': [647, 652], 'letter.': [648], 'agree': [650], 'study,R1': [653], 'along': [654], 'ours': [656], 'those': [658], 'others,R2': [660], 'strongly': [661], 'support': [662], 'view': [664], 'must': [670], 'carefully': [672], 'considered': [673], 'when': [674], 'risk-stratifying': [675], 'severe': [678], 'now': [684], 'routinely': [685], 'incorporating': [686], 'metabolic': [694], 'stress': [695], 'test': [696, 1410], 'reports': [697], 'considerations': [701], 'candidacy': [703], 'transplantation.': [706], 'Previous': [707], 'Back': [708], 'top': [710], 'Next': [711], 'FiguresReferencesRelatedDetailsCited': [712], 'By': [713], 'Tucker': [714], 'Lee': [716], 'N,': [717], 'Rodriguez-Miguelez': [718], 'Looney': [720], 'J,': [721, 793, 805, 886, 978, 980, 1089, 1135, 1172, 1241, 1317, 1360, 1436], 'Crandall': [722], 'R,': [723, 797, 799, 807, 1020, 1051, 1087, 1133, 1168, 1239, 1276, 1315, 1358, 1393, 1434], 'Forseen': [724], 'C,': [725, 757, 759], 'McKie': [726], 'K': [727], 'Harris': [729], 'R': [730, 895, 989, 1205, 1395], '(2018)': [731, 765, 815], 'testing': [733, 1035, 1149, 1218, 1291], 'cystic': [737], 'fibrosis—importance': [738], 'parameters,': [741], 'European': [742, 1298, 1300, 1419], 'Journal': [743, 875, 1009, 1040, 1121, 1157, 1192, 1228, 1301, 1346, 1420], 'Applied': [745], 'Physiology,': [746], '10.1007/s00421-018-4018-5,': [747], '119:1,': [748], '(227-234),': [749], 'Online': [750, 788, 844, 925, 1015, 1046, 1082, 1128, 1163, 1198, 1234, 1271, 1310, 1353, 1388, 1429, 1464], 'publication': [751, 789, 845, 926, 1016, 1047, 1083, 1129, 1164, 1199, 1235, 1272, 1311, 1354, 1389, 1430, 1465], 'date:': [752, 790, 846, 927, 1017, 1048, 1084, 1130, 1165, 1200, 1236, 1273, 1312, 1355, 1390, 1431, 1466], '1-Jan-2019.': [753], 'Fu': [754], 'T,': [755, 938], 'Chen': [756], 'Chang': [758, 760], 'H': [761, 764], 'Chu': [763], 'Analysis': [766], 'Exercise-Induced': [768], 'Periodic': [769], 'Breathing': [770], 'Using': [771], 'Autoregressive': [773], 'Model': [774], 'Hilbert-Huang': [777], 'Transform,': [778], 'Computational': [779], 'Mathematical': [781], 'Methods': [782], 'Medicine,': [784, 878], '10.1155/2018/4860204,': [785], '2018,': [786], '(1-8),': [787], '26-Jun-2018.': [791], 'Wagner': [792], 'Agostoni': [794], 'Arena': [796, 894, 988, 1019, 1086, 1132, 1167, 1204, 1238, 1275, 1314, 1357, 1392, 1433], 'Belardinelli': [798], 'Dumitrescu': [800], 'Hager': [802], 'Myers': [804, 885, 977, 1024, 1088, 1134, 1171, 1207, 1240, 1279, 1316, 1359, 1435], 'Rauramaa': [806], 'Riley': [808], 'Takken': [810], 'T': [811, 858], 'Schmidt-Trucksäss': [813], 'A': [814], 'Role': [817], 'Gas': [819], 'Exchange': [820], 'Variables': [821], 'Cardiopulmonary': [823, 863, 902, 1348], 'Testing': [825, 865, 904], 'Risk': [827], 'Stratification': [828], 'Management': [830], 'Reduced': [835], 'Ejection': [836], 'Fraction,': [837], 'American': [838, 1296, 1382, 1479], 'Journal,': [840, 1384], '10.1016/j.ahj.2018.05.009,': [841], '202,': [842], '(116-126),': [843], '1-Aug-2018.': [847], 'Gibelin': [848], 'Aldossari': [850], 'Bertora': [852], 'Moceri': [854], 'P': [855, 892, 943, 986], 'Hugues': [857], '(2012)': [859], 'New': [860], 'Parameters': [861], 'Patients': [867, 1342, 1456], 'Chronic': [869], 'Failure:': [871], 'Practical': [872], 'Applications,': [873], 'International': [874, 1008, 1039, 1156, 1191, 1227], '10.4236/ijcm.2012.36096,': [879], '03:06,': [880], '(532-537),': [881], '.': [882], 'Guazzi': [883, 975, 1021, 1103, 1173, 1202, 1277], 'Peberdy': [887, 981, 1092, 1141, 1169, 1245, 1283, 1323, 1366, 1397, 1442], 'Bensimhon': [889, 983, 1096], 'Chase': [891, 985, 1098], '(2009)': [896], 'Maximal': [897], 'Dyspnea': [898], 'Exertion': [900], 'During': [901], 'Is': [905], 'Related': [906, 1447], 'Poor': [908], 'Prognosis': [909], 'Echocardiography': [911], 'With': [912, 1343, 1457], 'Tissue': [913], 'Doppler': [914], 'Imaging': [915], 'Failure,': [918, 921, 1071, 1124, 1345], 'Congestive': [919], '10.1111/j.1751-7133.2009.00107.x,': [922], '15:6,': [923], '(277-283),': [924], '1-Nov-2009.': [928], 'DeJong': [929], 'Gallagher': [931], 'Sandberg': [933], 'Lillystone': [935], 'Spring': [937], 'Franklin': [939], 'B': [940], 'McCullough': [942], '(2008)': [944, 990], 'Minute': [950, 1107, 1262, 1450], 'Ventilation/Carbon': [951, 1108, 1263, 1451], 'Dioxide': [952, 1109, 1264, 1452], 'Production': [953, 1110, 1265], 'Relation': [954], 'Slope': [955, 1111, 1340, 1454], 'Morbidly': [957], 'Obese': [958], 'Men': [959], 'Women:': [961], 'Influence': [962, 1248, 1326], 'Subject': [964, 1328], 'Effort': [965, 1329], 'Body': [967], 'Mass': [968], 'Index,': [969], 'Preventive': [970], '10.1111/j.1751-7141.2008.07591.x,': [972], '11:2,': [973], '(100-105)': [974], 'Abella': [979, 1242], 'added': [992], 'efficiency': [997], 'Weber': [1000], 'classification': [1001], 'system': [1002], 'failure,': [1007, 1038, 1155, 1190, 1226], '10.1016/j.ijcard.2007.05.028,': [1012], '129:1,': [1013], '(86-92),': [1014], '1-Sep-2008.': [1018], 'M': [1022, 1101, 1104, 1142, 1174, 1177, 1246, 1284, 1324, 1367, 1398, 1443], '(2007)': [1026, 1059, 1105], 'Prognostic': [1027, 1061, 1179, 1255, 1286, 1332, 1400], 'end-tidal': [1030, 1183], 'carbon': [1031, 1184], 'during': [1033], '10.1016/j.ijcard.2006.04.058,': [1043], '117:1,': [1044], '(103-108),': [1045], '1-Apr-2007.': [1049], 'ARENA': [1050], 'GUAZZI': [1052], 'MYERS': [1054], 'ABELLA': [1057], 'Efficiency': [1065, 1119], 'Beta-Blocker': [1067], 'Therapy': [1068], 'Medicine': [1072], 'Science': [1074], 'Sports': [1076], 'Exercise,': [1078], '10.1249/01.mss.0000241655.45500.c7,': [1079], '39:2,': [1080], '(213-219),': [1081], '1-Feb-2007.': [1085], 'Hsu': [1090], 'L,': [1091], 'Pinkstaff': [1094], 'S,': [1095, 1137, 1319, 1362, 1438], 'Vicenzi': [1100], 'Prognostically': [1113], 'Superior': [1114], 'Uptake': [1118], 'Slope,': [1120, 1266], 'Cardiac': [1123], '10.1016/j.cardfail.2007.03.004,': [1125], '13:6,': [1126], '(462-469),': [1127], '1-Aug-2007.': [1131], 'Aslam': [1136, 1318, 1361, 1437], 'Varughese': [1138, 1320, 1363, 1439], 'E': [1139, 1321, 1364, 1440], '(2006)': [1143, 1178, 1209], 'Impact': [1144], 'time': [1146, 1411], 'variables': [1152], '10.1016/j.ijcard.2004.12.071,': [1160], '106:1,': [1161], '(88-94),': [1162], '1-Jan-2006.': [1166], 'Tevald': [1176], 'resting': [1182], '10.1016/j.ijcard.2005.06.032,': [1195], '109:3,': [1196], '(351-358),': [1197], '1-May-2006.': [1201], 'Comparison': [1210], 'cardiopulmonary': [1216, 1289], 'between': [1219], 'male': [1220], 'female': [1222], '10.1016/j.ijcard.2005.11.105,': [1231], '113:3,': [1232], '(395-400),': [1233], '1-Nov-2006.': [1237], '(2005)': [1247, 1285], 'Etiology': [1252], 'Chest,': [1267, 1460], '10.1378/chest.128.4.2812,': [1268], '128:4,': [1269], '(2812-2817),': [1270], '1-Oct-2005.': [1274], 'Ann': [1282], 'characteristics': [1287], 'failure:': [1294, 1378], 'comparing': [1295], 'models,': [1299], 'Prevention': [1304, 1423], 'Rehabilitation,': [1306, 1349, 1425], '10.1097/00149831-200512000-00008,': [1307], '12:6,': [1308], '(562-567),': [1309], '1-Dec-2005.': [1313], '(2004)': [1325, 1368], 'VO2': [1336, 1370], 'VE/VCO2': [1339, 1372], '10.1097/00008483-200409000-00006,': [1350], '24:5,': [1351], '(317-320),': [1352], '1-Sep-2004.': [1356], 'slope': [1373, 1405], 'comparison,': [1381], '10.1016/j.ahj.2003.07.014,': [1385], '147:2,': [1386], '(354-360),': [1387], '1-Feb-2004.': [1391], 'Humphrey': [1394], '(2016)': [1399], 'ability': [1401], 'VE/VCO': [1403], '2': [1404], 'calculations': [1406], 'using': [1407], 'different': [1408], 'intervals': [1412], 'subjects': [1414], ',': [1418], '10.1097/01.hjr.0000102817.74402.5b,': [1426], '10:6,': [1427], '(463-468),': [1428], '1-Dec-2003.': [1432], '(2003)': [1444], 'Technical': [1445], 'Considerations': [1446], 'Output': [1453], 'Failure*,': [1459], '10.1378/chest.124.2.720,': [1461], '124:2,': [1462], '(720-727),': [1463], '1-Aug-2003.': [1467], 'December': [1468], '12,': [1469, 1484], '2000Vol': [1470], 'Issue': [1472], '24Article': [1473], 'InformationMetrics': [1474], 'Copyright': [1475], '©': [1476], '2000': [1477, 1485], 'Associationhttps://doi.org/10.1161/01.CIR.102.24.e182': [1481], 'publishedDecember': [1483], 'PDF': [1486], 'download': [1487], 'Advertisement': [1488]}, 'cited_by_api_url': 'https://api.openalex.org/works?filter=cites:W1979801289', 'counts_by_year': [{'year': 2024, 'cited_by_count': 2}, {'year': 2023, 'cited_by_count': 1}, {'year': 2021, 'cited_by_count': 1}, {'year': 2020, 'cited_by_count': 5}, {'year': 2019, 'cited_by_count': 4}, {'year': 2018, 'cited_by_count': 8}, {'year': 2017, 'cited_by_count': 6}, {'year': 2016, 'cited_by_count': 3}, {'year': 2015, 'cited_by_count': 16}, {'year': 2014, 'cited_by_count': 10}, {'year': 2013, 'cited_by_count': 9}, {'year': 2012, 'cited_by_count': 8}], 'updated_date': '2024-12-14T07:10:17.470515', 'created_date': '2016-06-24'}