Do beta-blockers improve heart function in patients with cardiotoxicity?
Cardiotoxicity means damage to the heart caused by a medical treatment, most often cancer chemotherapy. The question is whether beta-blockers, a common class of heart drugs, can protect or improve heart function in people who develop this problem. The short answer: in some situations they appear to help preserve heart pumping function, but the benefit is not consistent across all causes of cardiotoxicity, and the evidence is still evolving.
What the research says
A 2026 systematic review and meta-analysis of 8 studies with 772 breast cancer patients found that beta-blockers were linked to significantly better preservation of left ventricular ejection fraction (LVEF, a measure of how much blood the heart pumps out with each beat) compared with placebo or standard care 1. The average difference was about 2.85 percentage points, though the studies varied widely and the certainty of the evidence was limited 1. A separate network meta-analysis of 22 randomized trials in 1,916 patients receiving cancer therapy also examined cardioprotective drugs, including beta-blockers, for preventing heart failure caused by cancer treatment 10. That analysis found that some drugs, such as aldosterone antagonists, showed stronger signals for protecting LVEF, while beta-blockers were among the agents studied but did not emerge as the most clearly effective option 10. A 2021 review of trastuzumab-induced cardiotoxicity (heart damage from a HER2-targeted breast cancer drug) reported that starting beta-blockers and ACE inhibitors may help prevent this specific type of heart problem 9.
What to ask your doctor
- Ask whether beta-blockers have been studied for the specific type of cardiotoxicity you are facing (for example, from anthracyclines versus trastuzumab versus other causes).
- Ask what your current LVEF is and whether it has changed over time, so you can track heart function together.
- Ask whether a cardio-oncology specialist should be involved in your care.
- Ask what the potential benefits and risks of beta-blockers would be for you personally, given your cancer treatment plan and other health conditions.
- Ask whether other heart-protective strategies, such as exercise or other medications, might also be appropriate for your situation.
This question is drawn from common patient questions about Cardiology and answered using cited medical research. We do not provide individualized advice.