Hi and welcome to the Chiari forum.
Shingles is a virus and it is from the same virus as chicken pox...when u were younger and had chicken pox the virus remained in ur body.When our immune system inactivates the virus....later in life something can cause the virus to reactivate...and cause us pain, rashes....etc....
Many with Chiari do have autoimmune issues, so if the flare of the chiari triggered the shingles could be possible, that could be the only connection that I can think of.
U deff need to see a true chiari specialist to see how ur chiari is affecting ur overall health.With heart palps u should have ur heart checked out completely.
We have a list of Drs compiled of the names of the members drs- it is not meant as a referral, but as a means to help u get started on ur research of drs.
http://www.medhelp.org/health_pages/Neurological%20Disorders/DOCTORS-LIST-FOR-CHIARI-SYRINGOMYELIA/show/1062?cid=186
Sleep issues is a big part of chiari and I would also assume with shingles as well.
"selma"