Persistent impairment in cardiopulmonary fitness after breast cancer chemotherapy

Journal article


Foulkes, Stephen J., Howden, Erin J., Bigaran, Ashley, Janssens, Kristel, Antill, Yoland, Loi, Sherene, Claus, Piet, Haykowsky, Mark J., Daly, Robin M., Fraser, Steve F. and La Gerche, Andre. (2019). Persistent impairment in cardiopulmonary fitness after breast cancer chemotherapy. Medicine and Science in Sports and Exercise. 51(8), pp. 1573 - 1581. https://doi.org/10.1249/MSS.0000000000001970
AuthorsFoulkes, Stephen J., Howden, Erin J., Bigaran, Ashley, Janssens, Kristel, Antill, Yoland, Loi, Sherene, Claus, Piet, Haykowsky, Mark J., Daly, Robin M., Fraser, Steve F. and La Gerche, Andre
Abstract

Purpose Anthracycline chemotherapy (AC) is associated with acute reductions in cardiopulmonary fitness (V˙O2peak). We sought to determine whether changes in V˙O2peak and cardiac function persisted at 12 months post-AC completion, and whether changes in cardiac function explain the heightened long-term heart failure risk. Methods Women with breast cancer scheduled for AC (n = 28) who participated in a nonrandomized trial of exercise training (ET; n = 14) or usual care (UC; n = 14) during AC completed a follow-up evaluation 12 months post-AC completion (16 months from baseline). At baseline, 4 months, and 16 months, participants underwent a resting echocardiogram (left ventricular ejection fraction; global longitudinal strain), a blood sample (troponin; B-type natriuretic peptide), a cardiopulmonary exercise test, and cardiac MRI measures of stroke volume (SV), heart rate, and cardiac output (Qc) at rest and during intense exercise. Results Seventeen women (UC, n = 8; ET, n = 9) completed evaluation at baseline, 4 months, and 16 months. At 4 months, AC was associated with 18% and 6% reductions in V˙O2peak in the UC and ET groups, respectively, which persisted at 16 months (UC, −16%; ET, −7%) and was not attenuated by ET (interaction, P = 0.10). Exercise Qc was lower at 16 months compared with baseline and 4 months (P < 0.001), which was due to a blunted augmentation of SV during exercise (P = 0.032; a 14% reduction in peak SV), with no changes in heart rate response. There was a small reduction in resting left ventricular ejection fraction (baseline to 4 months) and global longitudinal strain (between 4 and 16 months) and an increase in troponin (baseline to 4 months), but only exercise Qc was associated with V˙O2peak (R2 = 0.47, P < 0.01). Conclusion Marked reductions in V˙O2peak persisted 12 months after anthracycline-based chemotherapy, which was associated with impaired exercise cardiac function.

Keywordscardiotoxicity; cardiac function; cardiopulmonary fitness; exercise training
Year2019
JournalMedicine and Science in Sports and Exercise
Journal citation51 (8), pp. 1573 - 1581
PublisherLippincott Williams & Wilkins
ISSN0195-9131
Digital Object Identifier (DOI)https://doi.org/10.1249/MSS.0000000000001970
Scopus EID2-s2.0-85068849474
Page range1573 - 1581
Research GroupMary MacKillop Institute for Health Research
Publisher's version
File Access Level
Controlled
Place of publicationUnited States of America
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