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dc.contributor.authorBeaudry, R
dc.contributor.authorHowden, EJ
dc.contributor.authorFoulkes, S
dc.contributor.authorBigaran, A
dc.contributor.authorClaus, P
dc.contributor.authorHaykowsky, MJ
dc.contributor.authorLa Gerche, A
dc.date.accessioned2020-12-10T00:44:40Z
dc.date.available2020-12-10T00:44:40Z
dc.date.issued2019-01-01
dc.identifier.citationBeaudry, R., Howden, E. J., Foulkes, S., Bigaran, A., Claus, P., Haykowsky, M. J. & La Gerche, A. (2019). Determinants of exercise intolerance in breast cancer patients prior to anthracycline chemotherapy. PHYSIOLOGICAL REPORTS, 7 (1), https://doi.org/10.14814/phy2.13971.
dc.identifier.issn2051-817X
dc.identifier.urihttp://hdl.handle.net/11343/253563
dc.description.abstractWomen with early-stage breast cancer have reduced peak exercise oxygen uptake (peak VO2 ). The purpose of this study was to evaluate peak VO2 and right (RV) and left (LV) ventricular function prior to adjuvant chemotherapy. Twenty-nine early-stage breast cancer patients (mean age: 48 years) and 10 age-matched healthy women were studied. Participants performed an upright cycle exercise test with expired gas analysis to measure peak VO2 . RV and LV volumes and function were measured at rest, submaximal and peak supine cycle exercise using cardiac magnetic resonance imaging. Peak VO2 was significantly lower in breast cancer patients versus controls (1.7 ± 0.4 vs. 2.3 ± 0.5 L/min, P = 0.0013; 25 ± 6 vs. 35 ± 6 mL/kg/min, P = 0.00009). No significant difference was found between groups for peak upright exercise heart rate (174 ± 13 vs. 169 ± 16 bpm, P = 0.39). Rest, submaximal and peak exercise RV and LV end-diastolic and end-systolic volume index, stroke index, and cardiac index were significantly lower in breast cancer patients versus controls (P < 0.05 for all). No significant difference was found between groups for rest and exercise RV and LV ejection fraction. Despite preserved RV and LV ejection fraction, the decreased peak VO2 in early-stage breast cancer patients prior to adjuvant chemotherapy is due in part to decreased peak cardiac index secondary to reductions in RV and LV end-diastolic volumes.
dc.languageEnglish
dc.publisherWILEY
dc.rights.urihttps://creativecommons.org/licenses/by/4.0
dc.titleDeterminants of exercise intolerance in breast cancer patients prior to anthracycline chemotherapy
dc.typeJournal Article
dc.identifier.doi10.14814/phy2.13971
melbourne.affiliation.departmentMelbourne Medical School
melbourne.affiliation.facultyMedicine, Dentistry & Health Sciences
melbourne.source.titlePhysiological Reports
melbourne.source.volume7
melbourne.source.issue1
dc.rights.licenseCC BY
melbourne.elementsid1367925
melbourne.contributor.authorLa Gerche, Andre
melbourne.contributor.authorHowden, Erin
dc.identifier.eissn2051-817X
melbourne.accessrightsOpen Access


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