What heart monitoring is needed for a stage 2B BC with CAD?

Question

Hello doctor,

This is a complex situation that needs your guidance. I am 61 years old with stage 2B breast cancer and severe coronary artery disease (three stents placed last year, ejection fraction 40 percent). I started Herceptin (Trastuzumab) last month but have been experiencing chest pain and severe shortness of breath. My blood pressure fluctuates between 180/100 and 90/60.

I am currently taking Metoprolol, Lisinopril, and Aspirin. A recent echocardiogram showed a further reduction in ejection fraction to 35 percent. Can I safely continue Herceptin with a low ejection fraction? What cardiac monitoring do I need? How should blood pressure fluctuations be managed during treatment? What warning signs should prompt immediate medical attention? I would appreciate detailed recommendations, as both my oncologist and cardiologist seem to have different opinions.

Kindly help.

Answer 1

Hello,

Welcome to icliniq.com.

I can understand your concern.

Continuing Herceptin (Trastuzumab) with a low ejection fraction can be possible, but close cardiac monitoring is crucial. It is important to discuss the risks and benefits with both your oncologist and cardiologist to determine the safest course of action. Regular assessments will help in detecting any early signs of worsening heart function and allow timely interventions.

Cardiac monitoring should include regular echocardiograms every three to four months to evaluate ejection fraction and overall heart function. Cardiac biomarkers such as troponin and B-type natriuretic peptide (BNP) should be checked periodically to detect potential cardiac damage. Holter monitoring may also be considered to assess heart rhythm and detect possible arrhythmias, especially if symptoms like palpitations occur.

Managing blood pressure fluctuations requires frequent blood pressure monitoring, especially during Herceptin treatment, to identify patterns and potential triggers. Adjustments in medications such as Metoprolol and Lisinopril may be needed under the guidance of your cardiologist to stabilize blood pressure. Lifestyle modifications, including regular low-impact exercise, stress reduction techniques, and a balanced diet, can also help in maintaining better blood pressure control.

Warning signs that require immediate medical attention include -

Severe or persistent chest pain, which could indicate worsening cardiac function.
Sudden or worsening shortness of breath may suggest heart failure exacerbation and should be addressed urgently.
Severe dizziness or lightheadedness could indicate dangerous blood pressure drops and needs prompt evaluation.
A rapid or irregular heartbeat may signal arrhythmias requiring urgent medical intervention.

A multidisciplinary care team is essential for managing both cancer and cardiac conditions effectively. Ensuring regular communication between your oncologist, cardiologist, and primary care physician will help coordinate treatments, adjust medications, and optimize your overall health.

I hope this helps.

Thank you.