Feasibility of Switching Fluoropyrimidine Due to Cardiotoxicity Study (CardioSwitch)
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ClinicalTrials.gov Identifier: NCT04260269 |
Recruitment Status :
Enrolling by invitation
First Posted : February 7, 2020
Last Update Posted : February 7, 2020
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Condition or disease | Intervention/treatment |
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Solid Tumor | Drug: Fluoropyrimidine |
Fluoropyrimidine chemotherapy agents, such as 5-fluorouracil and capecitabine, are occasionally associated with cardiotoxicity that may manifest as chest pain, ECG alterations, cardiac arrhythmia, and rarely myocardial infarction and sudden death. Clinical fluoropyrimidine cardiotoxicity is infrequent (1-8% of patients), but subclinical toxicity may be much more common (up to one third of patients). The underlying mechanisms are not well understood, but they may include abnormal coronary artery contractility or spasm, and myocardial toxicity. Cardiotoxicity may be less frequent with S-1 (a combination of tegafur, gimeracil and oteracil at a molar ratio of 1:0.4:1) as compared with 5-fluorouracil and capecitabine, but head-to-head comparisons are lacking.
Anecdotal evidence suggests that patients who have cardiotoxicity on other fluoropyrimidines may be successfully treated with S-1. The purpose of this retrospective study is to compare different 5-fluorouracil-based dosing modalities and S-1, and compare cardiotoxicity during these treatments.
The patient population was treated for solid tumors with a 5-fluorouracil based regimen and had a cardiac event grade 1-4. All patients were re-challenged with a different fluoropyrimidine or S-1 and assessed for cardiotoxicity during re-challenge.
Study Type : | Observational |
Estimated Enrollment : | 200 participants |
Observational Model: | Cohort |
Time Perspective: | Retrospective |
Official Title: | Feasibility of Switching Fluoropyrimidine Due to Cardiotoxicity in Patients With Solid Tumors: A Retrospective, International and Non-interventional Study |
Actual Study Start Date : | June 1, 2018 |
Estimated Primary Completion Date : | December 2020 |
Estimated Study Completion Date : | December 2025 |
- Drug: Fluoropyrimidine
This is the assessment of a specific evaluation of cardiac safety for patients with solid tumors who have experienced cardiotoxicity grade 1-4 during treatment with a fluoropyrimidine based treatment and are re-challenged with a different fluoropyrimidine.
This multicentre, retrospective database is built to assess the impact on the cardiac and global safety of two different fluoropyrimidine based treatment regimens, of which the first has caused cardiotoxicity grade 1-4.
Cardiac data will be collected by medical record review from initiation of first fluoropyrimidine-based treatment and switch to second fluoropyrimidine-based treatment until death or last follow-up. Basic demographics, cancer and treatment information from the whole course of cancer until death or last follow-up.
Other Names:- S-1 / Teysuno
- capecitabine
- 5-fluorouracil
- tegafur
- trifluridine-tipiracil / Lonsurf
- Recurrence of fluoropyrimidine related cardiac toxicity after switch to S-1 based treatment [ Time Frame: After switch to and during one line of S-1 based chemotherapy (average 6 months) ]Cardiac tolerability according to NCI-CTCAE following cardiotoxicity initiated switch of fluoropyrimidine to S-1
- Recurrence of fluoropyrimidine related cardiac toxicity after switch to any fluoropyrimidine [ Time Frame: After switch to and during one line of another fluoropyrimidine regimen (average 6 months) ]Cardiac tolerability according to NCI-CTCAE following cardiotoxicity initiated switch of fluoropyrimidine to another fluoropyrimidine chemotherapy
- Cardiac symptoms during fluoropyrimidine chemotherapy [ Time Frame: During one line of fluoropyrimidine based chemotherapy (average 6 months) ]Frequency and severity according to NCI-CTCAE of cardiac symptoms during different fluoropyrimidines and the correlation with other added cytotoxics or biologics
- Diagnostic work-up [ Time Frame: During one line of fluoropyrimidine based chemotherapy (average 6 months) ]Diagnostic work-up for cardiotoxicity in real world data
- Time-lines for cardiotoxicity [ Time Frame: During one line of fluoropyrimidine based chemotherapy (average 6 months) ]Time-lines for appearance of cardiotoxicity during fluoropyrimidine-based chemotherapy
- Dose-intensity [ Time Frame: During one cycle (average 3 weeks) of fluoropyrimidine-based chemotherapy causing cardiac toxicity ]Dose-intensity of the therapy at the cycle causing cardiotoxicity
- Alteration in cardiac functional parameters during fluoropyrimidine treatment induced cardiotoxicity [ Time Frame: During one cycle (average 3 weeks) of fluoropyrimidine-based chemotherapy causing cardiac toxicity ]
The alterations of (if evaluated), graded as normal, non-significant abnormalities or significant abnormalities.:
- ECG abnormalities
- Ejection fraction in %
- Coronary artery status on angiogram
- Cardiac arrhythmias in ECG, Holter or cardiac monitor registration
- Plasma troponin concentration and other cardiac enzymes and other laboratory tests as within reference range ro abnormal
- Serum alpha-fluoro-beta-alanine (FBAL) concentration

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Ages Eligible for Study: | 18 Years and older (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Sampling Method: | Non-Probability Sample |
All consecutive patients who fulfil the following inclusion criteria will be included in the database until the target number of patients has been included:
- Solid tumor
- Cardiotoxicity grade 1-4 during fluoropyrimidine-based treatment
- Re-challenge with a different fluoropyrimidine-based treatment. Primary endpoint is switch to S-1 and secondary any fluoropyrimidine population.
Inclusion Criteria:
- Solid tumor
- Cardiotoxicity grade 1-4 during fluoropyrimidine-based treatment
- Re-challenge with a different fluoropyrimidine-based therapy
Exclusion Criteria:
• Participation in a trial with experimental drugs

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04260269
Denmark | |
Odense University Hospital | |
Odense, Denmark | |
Finland | |
Department of Oncology | |
Tampere, Pirkanmaa, Finland, 33520 | |
Helsinki University Central Hospital | |
Helsinki, Uusimaa, Finland, 00290 | |
Oulu university hospital | |
Oulu, Finland | |
Turku university hospital | |
Turku, Finland | |
Iceland | |
Landspitali | |
Reykjavík, Iceland | |
Ireland | |
St. Vincents University Hospital | |
Dublin, Ireland | |
Netherlands | |
Academic Medical Center | |
Amsterdam, Netherlands | |
Norway | |
Haukeland University Hospital | |
Bergen, Norway | |
Sweden | |
Skone university hospital | |
Lund, Sweden | |
Karolinska University Hospital | |
Stockholm, Sweden | |
Sundsvall hospital | |
Sundsvall, Sweden | |
Uppsala academic hospital | |
Uppsala, Sweden |
Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
Responsible Party: | Pia Osterlund, Associate Professor Oncology, Tampere University Hospital |
ClinicalTrials.gov Identifier: | NCT04260269 |
Other Study ID Numbers: |
R18045 |
First Posted: | February 7, 2020 Key Record Dates |
Last Update Posted: | February 7, 2020 |
Last Verified: | February 2020 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | No |
Studies a U.S. FDA-regulated Drug Product: | No |
Cardiotoxicity Heart Diseases Cardiovascular Diseases Pathologic Processes Drug-Related Side Effects and Adverse Reactions Chemically-Induced Disorders Radiation Injuries Wounds and Injuries Trifluridine Fluorouracil Capecitabine |
Tegafur Antimetabolites Molecular Mechanisms of Pharmacological Action Antimetabolites, Antineoplastic Antineoplastic Agents Immunosuppressive Agents Immunologic Factors Physiological Effects of Drugs Antiviral Agents Anti-Infective Agents |