Cardio-oncology & other

Cardiovascular morbidity and mortality after radiotherapy for breast cancer: a systematic review and meta-analysis

HeartPublished Systematic review and meta-analysis

Pooled result · HFResult — go to the resultHazard ratio 1.37 95% CI 1.20–1.57

Authors' conclusion

Radiotherapy for breast cancer was associated with an increased risk of experiencing adverse cardiovascular events, which was highly dependent on the cardiac irradiation dose.

Study context

Population
Patients with breast cancer treated with or without radiotherapy
Participants
610,690 patients31 studies
Comparison
Radiotherapy vs no radiotherapy for breast cancer
Outcome
HF
Methodological detailsrandom-effects meta-analysis
  • Random-effects meta-analysis

Pooled result

As reported in the abstract

Hazard ratio

1.37

95% CI 1.20–1.57

Radiotherapyvs No radiotherapy
HR 1.37 (95% CI 1.20–1.57)

Further pooled results

CAD, left-sided vs other radiotherapy (irradiated patients)

HR (95% CI)
Left-sided radiotherapy1.11 (1.05–1.16)

Cardiac morbidity by mean heart exposure dose (linear correlation)

HR (95% CI)
Mean heart exposure dose1.12 (1.05–1.19)

Cardiac mortality with left-sided radiotherapy, by treatment period

Risk decreased after 1989 (HR 1.30 vs 1.02)
P < 0.01*

Publication bias

No evidence of significant publication bias

Original publication

Cardiovascular morbidity and mortality after radiotherapy for breast cancer: a systematic review and meta-analysis. Heart. Published 10 May 2025. doi:10.1136/heartjnl-2024-325179

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