I had 2 stints in 2 arteries, a pacemaker with difibulator. I'm on lots of medicines to strengthen my heart. My symptoms are: I can't walk straight, I walk humped over, I get dizzy going from 1 room to room and my legs are stiff, like caring 2 lead weights after I sit so long. Could my medication be causing me problems. I'm 72 years old and been in great all my life until I had this heart trouble.