Breast Cancer and Heart Health: The Connection You Need to Know About
- Surviving Breast Cancer
- Jun 12
- 5 min read
When we think about breast cancer, our minds naturally go to things like early detection, treatment plans, and survivorship. However, we sometimes overlook another crucial piece of the puzzle: heart health.
It might surprise you, but research has found that some breast cancer treatments can increase the risk of heart problems. That’s why it’s so important to look after your heart, too — not just during treatment, but also afterward. Continue reading to stay informed, proactive, and empowered every step of the way.
Why Heart Health Matters for Breast Cancer Patients
Heart disease is the leading cause of death in women in the United States, and breast cancer is the most commonly diagnosed cancer in women. Unfortunately, those who survive breast cancer may face an increased risk of developing cardiovascular disease due to specific cancer treatments.
According to the National Cancer Institute, some breast cancer treatments can cause short- or long-term damage to the heart. These include:
Anthracyclines (chemotherapy drugs) such as doxorubicin can weaken the heart muscle
HER2-targeted therapies, such as trastuzumab (Herceptin), can interfere with heart function
Radiation therapy directed at the left side of the chest can expose the heart to radiation and increase the risk of heart disease later in life
How Big Is the Risk?
A study by the Mayo Clinic, published by the National Cancer Institute, found that women treated for breast cancer had a significantly higher risk of developing heart failure compared to those who did not have cancer. The risk varies depending on the type and duration of treatment.
What You Can Do to Protect Your Heart
If you or someone you care about is undergoing treatment for breast cancer, it’s essential to know that cancer therapies, while lifesaving, can sometimes affect the heart. The good news is that there are proactive steps you can take to support heart health during and after treatment. Here’s how you can take charge:
1. Talk to Your Care Team
Start by having an open and honest conversation with your oncologist about the potential effects your cancer treatment could have on your heart. Certain chemotherapy drugs, targeted therapies, and radiation — mainly if directed near the chest — can increase the risk of heart complications.
Ask whether your treatment plan includes any therapies known to affect the heart and whether seeing a cardio-oncologist — a specialist who focuses on managing heart health in people with cancer — might be beneficial. Involving this expert early on can help you prevent or manage heart issues more effectively.
2. Monitor Your Heart Health
Regular monitoring can help detect any early signs of heart strain or damage before they become serious. Your health care team may recommend heart tests such as:
Echocardiograms to measure how well your heart is pumping
Electrocardiograms (EKGs) to check your heart’s electrical activity
Blood tests to monitor heart-specific enzymes
You can complete these tasks at various points — before treatment begins, during therapy, and follow-up visits after you complete treatment. Staying on top of these appointments is crucial for identifying any issues early.
3. Practice Heart-Healthy Habits
Taking care of your heart can also mean making everyday choices that support your overall well-being. Here are some heart-smart habits that can make a difference:
Eat a nutritious, balanced diet of fruits, vegetables, whole grains, and lean proteins. Try to limit processed foods, excess salt, and added sugars.
Move your body regularly. Even gentle forms of exercise, such as walking, stretching, or yoga, can improve circulation, boost your mood, and help maintain a healthy heart. Join SurvivingBreastCancer.org for yoga, Pilates, and other movement programs. You can check out our full event calendar at https://www.survivingbreastcancer.org/events.
Avoid tobacco use and limit alcohol intake. Both can add stress to your heart and reduce your body’s ability to heal.
Manage stress. Cancer treatment can be emotionally taxing, so it’s important to care for your mental and emotional health, too. Mindfulness exercises, deep breathing, journaling, speaking with a counselor, or joining a support group can all be beneficial. Join SurvivingBreastCancer.org for Thursday Night Thrivers, our weekly virtual support group with special meetups for metastatic breast cancer, early-stage breast cancer, inflammatory breast cancer, and a Spanish-language group!
4. Know the Symptoms of Heart Trouble
As you focus on cancer treatment, make sure to watch for signs that your heart may be under strain. Notify your doctor right away if you experience:
Shortness of breath, especially if exacerbated by minimal physical activity
Persistent fatigue that feels unusual for you
Chest pain or discomfort
Swelling in the ankles, feet, or legs
A rapid or irregular heartbeat
These symptoms can sometimes be subtle or overlap with side effects from cancer treatment, which is why it’s so important to speak up if something doesn’t feel right.
Remember: You don’t have to choose between treating cancer and protecting your heart — both are possible. With the correct information, support, and care, you can work closely with your medical team to manage your heart health while focusing on your overall recovery.
Count On Us for Information, Resources, and Support
Understanding the connection between breast cancer and heart health is essential for survivorship and long-term wellness. Healthcare professionals are increasingly recognizing the need for integrated care that supports both cancer recovery and cardiovascular health.
With the right knowledge and support, you can thrive during and after your breast cancer treatment and protect your heart for the journey ahead.
Remember, you’re not alone. Rely on your health care team, loved ones, and support networks to help you through this time.
Whether you’re newly diagnosed with breast cancer, are navigating survivorship, or are the loved one of someone experiencing breast cancer, you can count on SurvivingBreastCancer.org to keep you informed. We provide educational information to help you better understand symptoms, testing, treatment options, surgery, and other related topics. Additionally, we offer podcasts featuring professionals, advocates, and caregivers who share valuable insights and perspectives.
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Note: This article offers general information and does not replace professional medical advice. Make sure to discuss your options with your healthcare provider.
Read More:
On the Podcast: Breast Cancer Conversations
Breast Cancer in Younger Women: Navigating Survivorship, Surgery Choices, and Lymphedema with Dr. Kohli
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