See my heartbeat is a slow one

from Outkast (Ft. Kelis) – Dracula's Wedding Lyrics on Rap Genius

Meaning

Vampires are living undead. It makes sense that there heartbeats are slow, compared to an actual living thing.
When a person is scared their heart rate goes up. Andre (as a vampire) is explaining that normally his heart rate is slow but she might raise it.

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