Hiya Helpnhand and Welcome to HealingWell!!
While I'm pretty familiar with some of the arrhythmias, I'd like to recommend that you look at some of the other threads and posts in this forum first to see if any of them offer you some info or insight into this problem?!
The current medication that your friend is on is an antidepressant that when looking it up, I noticed that it can actually increase the blood pressure. Does your friend take her BP on a regular basis? Perhaps with her current situation you could mention this might be a good idea for her to get a more continuous record of her BP.
I've found some additional sites that I can recommend to you and these sights themselves will lead you to more info if you need it.
Please keep in touch and let me know if this helps at all?! Best wishes to you and your friend!!
Teri
http://www.nlm.nih.gov/medlineplus/ency/article/001101.htm
http://www.americanheart.org/presenter.jhtml?identifier=560