Abstract
Background
This study aims to compare the incidence of cardiac events and to identify its predictors in left breast cancer patients receiving adjuvant radiotherapy using breath-hold technique (DIBH) versus free breathing technique (FB).
Methods
We conducted a retrospective multi-center study of two arms; the free breathing arm included 208 patients who were treated with traditional radiotherapy treatment technique, while DIBH arm included 224 patients who were treated with breath-hold technique using The Varian Real-time Position Management (RPM). We retrospectively reviewed the medical records of the patients from January 2010 to December 2017.
Results
The mean dose to the heart and left anterior descending artery were significantly lower in the DIBH arm (2.10 ± 0.39 and 6.16 ± 0.18 Gy) compared with (4.29 ± 0.60 Gy and 12.69 ± 0.93 Gy, respectively) in the FB arm. The incidence of cardiac events was higher in the FB arm than in the DIBH arm, but it was not statically significant. Our analysis revealed that age, diabetes, hypertension, smoking, mean LAD dose, and heart mean dose were significant prognostic factors for the occurrence of cardiac events in the breath-hold arm. Hypertension, smoking, as well as heart mean dose were independent risk factors for the occurrence of cardiac events.
Conclusion
Use of the DIBH technique resulted in a significant reduction in doses to the heart, LAD and lesser cardiac events incidence compared to free breathing.
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Availability of data and materials
The datasets used and analyzed during the current study are available from the first author on reasonable request.
Abbreviations
- DIBH:
-
Deep inspiration breath-hold
- FB:
-
Free breathing technique
- RPM:
-
Real-time position management
- BCS:
-
Breast conservative surgery
- OARs:
-
Organs at risk
- WBI:
-
Whole breast radiation
- IHD:
-
Ischemic heart disease
- PRV:
-
Planning organ at risk volume
- PTV:
-
Planning target volume
- RTOG:
-
Radiation therapy oncology group
- CAD:
-
Coronary artery disease
- ABC:
-
Active breathing control
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We would like to thank the staff who took care of our patients' needs, and who were involved in gathering, documenting, verifying, forwarding, and processing the clinical data.
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Our manuscript is a part of a PhD thesis under the title (comparative study between deep inspiration breath-hold and free breathing radiotherapy techniques in patients diagnosed with left breast cancer). It has not been previously presented or published in a conference.
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The study was approved by the ethics committee of the Faculty of Medicine, Kafrelsheikh University (code MKSU 50-6-18, date of approval: 12/11/2018) and was carried out in accordance with the Declaration of Helsinki, and the requirement for informed consent was waived because of the retrospective design.
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Mahmoud, A.A., Sadaka, E.A., Abouegylah, M. et al. Impact of breath-hold technique on incidence of cardiac events in adjuvant left breast cancer irradiation. J Cancer Res Clin Oncol 149, 5853–5859 (2023). https://doi.org/10.1007/s00432-022-04551-8
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DOI: https://doi.org/10.1007/s00432-022-04551-8