Hello, Thanks for writing to Health Care magic, I am Dr , Muhammad Ahmad , I have read your question closely, I understand your concern and will be helping you with your health related problem. Right artery usually causes less dangers as compared to the left one and if stent has been placed then most probably your wife is safe as far as cardiology point of view is concerned. Regarding chemotherapy, there are certain drugs which are more cardiotoxic and they can affect the heart negatively specially immediately after a heart attack but usually they can be continued after heart has recovered (usually in 6-8 weeks of heart attack) , other safe chemo therapy drugs can be started earlier. In my opinion you wife will be able to take her chemo without any problems doctor will just keep monitoring her heart which is usually done with the help of echocardiography , and if that stays fine , she will be able to complete the course without any problems. In a nut shell i would say that moderate cardiac even doesn t affect decision of chemo in a patient. I hope this answered your question, If you have more queries I am happy to answer you. Regards. Dr.Muhammad Ahmad