Just like the topic title above asks, do Vampires in TES have heartbeats? Or should I say, are they technically considered dead, going off of other Vampires in other forms of media?

The in-game books seem to indicate that http://www.uesp.net/wiki/Lore:Vampires_of_the_Iliac_Bay, so I'd assume they have no heartbeat, don't need to breathe, etc. However, in terms of game mechanics this is only reflected in Daggerfall--in Morrowind onward you just wake up one day feeling hungry for blood, without any apparent death.