This is my first time posting on LACTNET.  I once had a similar reaction
after being injected with Novocaine or a similar anaesthetic - heart racing,
difficulty breathing, felt like a heart attack.  It seems the dentist
accidentally injected the anaesthetic into the "wrong place" and it was
absorbed directly into the bloodstream.  The dentist said this happens
occasionally.  I wonder if this woman may be having some reaction or allergy
to the Novocaine.
    Incidentally, I never trusted the dentist after that experience and
switched to someone else.  I became more frightened of the Novocaine than the
dental procedure!
Beth Lichy
Silver Spring, MD