Heart monitoring during chemotherapy

Heart checks protect you. Some cancer medicines can affect how well the heart pumps, and the change is often silent at first. Regular scans let your team spot a small drop early, long before you would feel anything, and act while it is easiest to manage. A heart check is not a sign that your doctors expect damage; it is the reason serious heart problems during treatment are uncommon.

The main test is an echocardiogram, usually called an echo, which is an ultrasound scan of the heart. It is painless, uses no radiation and takes a short time. Some centres use a different scan, called a MUGA scan, or a heart MRI. An ECG, which records the heart rhythm through stickers on the chest, and blood pressure checks are often done too. How often you are checked depends on your medicines and your heart health, and your team will plan this.

The key measurement

The echo measures the ejection fraction, which is the share of blood the main pumping chamber pushes out with each beat. It shows how strongly the heart pumps.

Changes are compared with your own baseline

Each result is compared with your scan before treatment, so small changes stand out.

Blood tests may be added

Some teams also check heart-related blood markers alongside scans.

It cannot tell you how often you personally need heart checks, or what your results mean. Schedules differ by medicine, cancer type and heart health, and results must be interpreted by your team, who know the full picture.

It also cannot tell you what to do if a scan result worries you. Never stop or change your treatment on your own. Ask your oncologist to explain the result and the plan.

Missed scans matter

If a heart scan is due, try to have it on time. A delayed scan can delay treatment decisions. If you cannot attend, tell your team so it can be rearranged.

Scans at other centres

Different machines and operators can give slightly different results. Where possible, have repeat scans at the same centre, or bring previous reports.

Monitoring may continue after treatment

After some medicines, especially anthracyclines, heart checks may be offered for years, particularly for people treated young.

Ask for your results

It is reasonable to ask what your pumping strength is and how it compares with before. Keep copies in your treatment file.

Other conditions affect results

Low haemoglobin, infection, dehydration and high blood pressure can all affect heart readings, and your team will consider them.

Costs and travel

Repeated scans add to costs and trips. Ask your team whether scans can be timed with treatment visits.

Heart specialists can join your care

If results change, a cardiologist experienced in cancer care can work with your oncologist to protect your heart and keep treatment on track.

A normal result is reassuring, but symptoms still count

A normal scan shows your heart is pumping well at that time. It does not replace reporting symptoms between scans, because changes can develop. If you feel breathless, swollen or unwell, tell your team rather than waiting for the next check.

Understanding the report wording

Scan reports use terms like mild reduction or preserved function, which can be confusing or alarming. Ask your oncologist to explain what the words mean for you and whether any action is needed.

Scans are timed around treatment decisions

Heart checks are usually planned so results are ready before particular doses. Having the scan on the right day avoids delays in treatment.

Look after your heart between scans

Keeping blood pressure and blood sugar controlled, staying gently active, cutting down salt and stopping smoking all support the heart and can help results stay stable.

What to do next

Ask your team which heart checks you need and how often, keep every scan appointment, and ask for copies of results. Report breathlessness, swelling, chest pain or palpitations promptly rather than waiting for the next scan, and never stop treatment without advice.