Hi welcome to HCMForum. After myocardial infarction
how much ever you are conscious there will be load on the heart causing swollen feet called oedema.
it needs additional treatment. pea size swelling is some thing else cyst
.to be diagised by a surgeon. i advise you to consult a surgeon for treatment.
minimise standing time and exertion. i advise you to controle salt to .25 of your consumption. prefer raw vegetables sprouts fruits and juices. dont worry
you will be fine.