I get sensations of my heartbeat in my arms, shoulder and back. It comes and goes. I can put my hand over certain spots and literally feel the thumping. Sometimes I got so intense, I could see the part of my body move, like as if it were twitching, but with my heartbeat. I've told this to my neuros and they said this is an autonomic nervous system reaction....none ever mentioned anything vascular, but now I am wondering..