pain in heart

Hi,

My father had a symptom of heartattack, like he was little chest pain and we showed him to a heart hospitl.They did angiography and they find blockage in secondary heart vessels of 30-40%blockage.So they gave medicine to take for 15days.Now i am wondering will this affect in future and will this is curated through medication. Shall we show to someother doctors since the first doctor didn't do any surgery.

Pls advice me in this regards

If you want more information about the case i can give u

Thanks