I'm sorry that you are where you are. My mother went through this during COVID (left breast -- right breast is generally considered 'better').
Here's a bit of a summary of current best practices thinking:
Quote
American Heart Association
Patients who have undergone radiation should be screened and aggressively treated for cardiovascular risk factors such as hypertension, dyslipidemia, diabetes, obesity, inactivity, and smoking. The American Society of Echocardiography has proposed guidelines in 2013 for screening of radiation‐induced cardiovascular disease, recommending to screen with transthoracic echocardiogram, cardiac magnetic resonance imaging, or coronary computed tomography angiography in patients who have received more than 35 Gy of radiation, either 5 years after completion of therapy or after ages 30 to 35 years old, whichever is last (Figure 4). Any new cardiac symptoms should warrant investigation.60 Hence, cardiovascular disease should be screened for diligently and according to current guidelines in patients having received radiation.
SOURCE
Basically, they have identified a few comorbidities that are seen as risk factors for RIHD (Radiation-Induced Heart Disease) and believe that getting optimal control over those is the best way through. They also believe that 'surveillance' (regular evaluation and screening after the radiation) is important.
I wish you all the best.
