Nope! As far as I know, severe depression cannot give you a heart attack. Well if it did so, I would have had about ten heart attacks by now. What I have learnt is when severely depressed you can suffer from panic attacks and those make you FEEL like you are having a heart attack. I would suggest you seek professional consultation before things get even worse. Why don’t you check out any second opinion site? There’s no harm in doing so. I do it all the time and it has worked for me so far.