Medical Oncologist
Heart monitoring on Herceptin
Heart Function and Trastuzumab: — Understanding Your ECHO Reports
Trastuzumab can affect how well your heart pumps in a proportion of patients. Most changes are caught early through routine ECHO checks and are reversible when managed promptly. A few symptoms, however, need emergency care the same day.
Medically reviewed by Dr. T. Raghavender Reddy, Medical Oncologist, MBBS · DM (Medical Oncology) · MD (Radiation Oncology) · Last reviewed August 2026
- Caught early, often reversible — Unlike some other cancer drugs, trastuzumab-related heart changes frequently improve after treatment is held or stopped.
- ECHO scans are your early warning — Regular echocardiograms detect changes in heart function before you feel them.
- Some symptoms cannot wait — Chest pain, severe breathlessness, or fainting need emergency assessment now, not a callback.
- Mild symptoms still need reporting — New breathlessness on exertion may be the first sign. Tell your team at your next visit, or sooner if it worsens.
17+
Cancer Specialists
on Panel
on Panel
96.9%
Breast Cancer
Survival Rate*
Survival Rate*
15,000+
Patients
Treated
Treated
4.8★
Google Rating
(800+ reviews)
(800+ reviews)
Trastuzumab can reduce how effectively your heart pumps blood, a change detected by ECHO scans before you feel it. In a proportion of patients this becomes noticeable as breathlessness, ankle swelling, or unusual tiredness. Most cases are reversible. Chest pain, fainting, or sudden severe breathlessness need emergency care now, not a phone call.
What symptoms should you report at your next visit?
You may notice breathlessness on climbing stairs or walking briskly that was not there before. Report this at your next scheduled visit, or sooner if it is getting worse from day to day.
Mild ankle swelling at the end of the day, or waking with a cough, can also be early signs. Neither is an emergency on its own, but both are worth mentioning so your team can decide whether to move your next ECHO earlier.
Unusual fatigue beyond what you expect from treatment is harder to judge on its own. If it arrives suddenly or alongside any of the symptoms above, call your team the same day rather than waiting.
Meet the Specialists
17+ senior cancer specialists. One panel for your case.
Trained at AIIMS, Tata Memorial, and leading international centres. Combined 150+ years of experience. Every complex case is reviewed by 3+ of them — together.
Medical Oncologist
Dr. C. Raghavendra Reddy
MBBS(Gold Medal), DNB(General Medicine), DM(Medical Oncology)(Gold Medal)
Medical Oncologist
Dr. Bharati Devi Gorantla
MBBS, MD(General Medicine), DM(Medical Oncology)(Adyar,Chennai), ECMO, MRCP SCE(UK)
Medical Oncologist
Dr. Owais Mohammed
MBBS, MD (General Medicine), DrNB (Medical Oncology), ECMO, MRCP SCE (Medical Oncology) (UK)
Medical Oncologist
Medical Oncologist
Surgical Oncologist
Dr. Muralidhar Muddusetty
MBBS (AIIMS), MS (Surgery) (AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh)
Surgical Oncologist
Surgical Oncologist
Surgical Oncologist
Dr. Vinay Mamidala
MBBS, MS(General Surgery), M.Ch(Surgical Oncology), FMAS, FARIS(Ongoing)
Surgical Oncologist
Radiation Oncologist
Radiation Oncologist
Radiation Oncologist
Hematologist
Interventional Radiologist
Dr. Mohammed Imran
Surgical Oncologist
Dr. Vajja Sandeep Kumar
MBBS, MS (General Surgery), DrNB (Surgical Oncology), FALS Oncology
Surgical Oncologist
Want a specific doctor for your case? Mention them when booking.
Book Free ConsultationBook an appointment with our specialist
Share your name and number — we'll call you back within 30 minutes to schedule your consultation.
Not sure whether this counts as an emergency?
Call the helpline. It is always better to check than to wait.
When should you call your team and when should you go straight to emergency?
| Symptom | Mention at next visit | Call your team today | Go to emergency now |
|---|---|---|---|
| Breathlessness | Mild, only on heavy exertion, stable day to day | New, comes on with gentle activity, or worsening | Sudden, severe, or present at rest |
| Ankle or leg swelling | Mild at end of day, no other symptoms | Both legs, increasing, or accompanied by breathlessness | Sudden swelling with severe breathlessness |
| Heartbeat | Occasional palpitations that pass quickly | Frequent palpitations or a new irregular rhythm | Fast or irregular heartbeat at rest that does not settle |
| Fatigue | Consistent with your usual treatment level | Sudden worsening, or alongside other symptoms here | Combined with chest pain or near-fainting |
| Typically starts | Can occur at any point during or after treatment | Gradual onset — report as soon as you notice the change | Sudden onset — never delay |
What do your ECHO results actually mean?
An ECHO measures how much blood your heart pumps out with each beat. Your oncologist is watching for any fall from your own starting level. A small change may mean closer monitoring. A more significant fall may mean pausing trastuzumab while your heart is assessed.
Your results are compared to your own baseline scan, not to a generic population normal. The question your team is asking is whether your heart function has changed since you started, and by how much.
If your oncologist says your ECHO is borderline, ask before you leave: how soon is the next scan, does treatment continue in the meantime, and what level of change would trigger a pause. That conversation belongs at the appointment, not at the next one.
Explore 75 more Breast Cancer Targeted Medicines topics
Drug Deep Dive: Trastuzumab (Herceptin)
- Adjuvant Trastuzumab: Why Exactly 12 Months After Surgery?
- Diet and Nutrition While on Trastuzumab
- Drug, Food and Supplement Interactions With Trastuzumab
- Fatigue, Chills and Flu-Like Symptoms After a Trastuzumab Infusion
- Fertility, Pregnancy and Contraception on Trastuzumab
- Heart Function and Trastuzumab: Understanding Your ECHO Reports
- Herceptin vs Biosimilar Trastuzumab: Are They Really the Same?
- How Does Trastuzumab Work? The Anti-HER2 Monoclonal Antibody Explained
- How Long Does Trastuzumab Take to Work?
- How Long Will You Stay on Trastuzumab?
- Subcutaneous Trastuzumab vs IV Infusion: Which Suits You Better?
- Tests and Monitoring While You Are on Trastuzumab
- Trastuzumab (Herceptin and biosimilars): The Complete Patient Guide
- Trastuzumab Infusion Day: Premedication, Duration and What to Expect
- Trastuzumab Infusion Reactions: What Happens and How They're Managed
- Trastuzumab Myths: 'It's Chemotherapy' and Other Misunderstandings
- Trastuzumab Price in India: Innovator, Biosimilar and Cost Per Cycle
- Trastuzumab Side Effects: The Complete List and Timeline
- Trastuzumab Success Rate and Survival: An Honest Look at the Numbers
- Trastuzumab With Pertuzumab, Chemotherapy and Hormone Therapy
- Trastuzumab in Elderly Patients and Those With Other Illnesses
- When Trastuzumab Stops Working: Resistance and What Comes Next
- Who Is Eligible for Trastuzumab? HER2-Positive Breast and Gastric Cancer
- Will Insurance or a Government Scheme Pay for Trastuzumab?
- Work, Travel and Daily Life on Trastuzumab
Drug Deep Dive: Palbociclib (Ibrance)
- Diet and Nutrition While on Palbociclib
- Drug, Food and Supplement Interactions With Palbociclib
- Fatigue on Palbociclib: Why It Happens and What Genuinely Helps
- Fertility, Pregnancy and Contraception on Palbociclib
- How Does Palbociclib Work? The CDK4/6 Inhibitor Explained
- How Long Does Palbociclib Take to Work?
- How Long Will You Stay on Palbociclib?
- Low White Cell Count on Palbociclib: Expected, and Rarely Dangerous
- Mouth Sores and Infection Risk on Palbociclib
- Palbociclib (Ibrance, Palbace): The Complete Patient Guide
- Palbociclib Myths: Low Counts, Hair Loss and Stopping Early
- Palbociclib Price in India: Brand, Generic and Monthly Cost
- Palbociclib Side Effects: The Complete List and Timeline
- Palbociclib Success Rate and Survival: An Honest Look at the Numbers
- Palbociclib With Letrozole or Fulvestrant: Understanding Your Combination
- Palbociclib in Early Breast Cancer: Why It Is Not Given After Surgery
- Palbociclib in Elderly Patients and Those With Other Illnesses
- Palbociclib vs Ribociclib vs Abemaciclib: Which CDK4/6 Inhibitor?
- Taking Palbociclib: Food, Timing and What to Do If You Miss a Dose
- Tests and Monitoring While You Are on Palbociclib
- The 21-Days-On, 7-Days-Off Palbociclib Cycle Explained
- When Palbociclib Stops Working: Resistance and What Comes Next
- Who Is Eligible for Palbociclib? Hormone-Receptor-Positive, HER2-Negative Breast Cancer
- Will Insurance or a Government Scheme Pay for Palbociclib?
- Work, Travel and Daily Life on Palbociclib
Drug Deep Dive: Trastuzumab Deruxtecan (Enhertu)
- Diet and Nutrition While on Trastuzumab Deruxtecan
- Drug, Food and Supplement Interactions With Trastuzumab Deruxtecan
- Enhertu Myths: 'It's Just Stronger Herceptin' and Cost Misconceptions
- Enhertu in Breast, Gastric and Lung Cancer: One Drug, Three Diseases
- Fertility, Pregnancy and Contraception on Trastuzumab Deruxtecan
- HER2-Low Breast Cancer: How Enhertu Created an Entirely New Patient Group
- How Does Trastuzumab Deruxtecan Work? The HER2-Directed Antibody-Drug Conjugate Explained
- How Long Does Trastuzumab Deruxtecan Take to Work?
- How Long Will You Stay on Trastuzumab Deruxtecan?
- Interstitial Lung Disease on Enhertu: The Side Effect That Needs Immediate Action
- Low Blood Counts, Hair Loss and Heart Monitoring on Enhertu
- Nausea and Vomiting on Trastuzumab Deruxtecan: Managing a High-Risk ADC
- Tests and Monitoring While You Are on Trastuzumab Deruxtecan
- Trastuzumab Deruxtecan (Enhertu): The Complete Patient Guide
- Trastuzumab Deruxtecan Infusion Day: Premedication, Duration and What to Expect
- Trastuzumab Deruxtecan Price in India: Innovator, Biosimilar and Cost Per Cycle
- Trastuzumab Deruxtecan Side Effects: The Complete List and Timeline
- Trastuzumab Deruxtecan Success Rate and Survival: An Honest Look at the Numbers
- Trastuzumab Deruxtecan in Elderly Patients and Those With Other Illnesses
- Trastuzumab Deruxtecan vs T-DM1 and Trastuzumab: How ADCs Differ
- When Trastuzumab Deruxtecan Stops Working: Resistance and What Comes Next
- Where Trastuzumab Deruxtecan Fits Alongside Chemotherapy and Hormone Therapy
- Who Is Eligible for Trastuzumab Deruxtecan? HER2-Positive and HER2-Low Breast, Gastric and Lung Cancer
- Will Insurance or a Government Scheme Pay for Trastuzumab Deruxtecan?
- Work, Travel and Daily Life on Trastuzumab Deruxtecan
Next step
Still not sure what applies to you?
Send your reports across and a senior medical oncologist will go through what they mean, what is known, and what the options actually are.
Common questions
Frequently asked questions
Is the heart damage from trastuzumab permanent?
In a majority of patients, trastuzumab-related reductions in heart function improve after treatment is held or stopped. This distinguishes it from some chemotherapy drugs, where heart changes can be more lasting. Whether your function returns to your own baseline, and how quickly, depends on how significant the change was and how early it was caught. Your oncologist will monitor your ECHO results over time and explain what they are seeing.
What does the ejection fraction number on my ECHO report mean?
Your ejection fraction is the percentage of blood your heart pumps out with each beat. Your team is less focused on the single number and more focused on whether it has changed from your starting scan. A reading that sits in a broadly normal range but has dropped noticeably from your own baseline is still something your oncologist will act on. Ask them to compare your current figure to your first scan and explain what they are watching for going forward.
Will trastuzumab have to stop if my ECHO changes?
Not necessarily, and not immediately in every case. NCCN and ASCO guidance distinguishes between small changes that warrant closer monitoring and more significant falls that need treatment to be held. A pause is not the same as stopping permanently — many patients restart trastuzumab successfully once heart function stabilises or recovers. Your oncologist will weigh the cardiac change against how important continuing treatment is for your cancer, and explain the options available to you.
How often will I need ECHO checks while on trastuzumab?
ASCO guidance recommends a baseline assessment before starting and regular monitoring during treatment, with the interval depending on your starting heart function and whether any changes appear along the way. Your oncologist will set a schedule specific to you. If you are unsure when your next ECHO is booked, confirm it at your next clinic visit rather than assuming it will be arranged automatically.
Can I exercise while on trastuzumab?
For most patients, gentle regular activity is not harmful and is generally encouraged. The question to ask is how much is appropriate given your current ECHO results. If your heart function is being monitored closely or has recently changed, your team will advise on what level of activity is right for you. Do not stop all activity without checking first — inactivity also affects heart health. Breathlessness that comes on at a level of effort that previously felt easy is worth reporting to your team.