Hi Catherinelymie!
Welcome to our community. I'm glad you found us.
Yes, the heart can very much be affected when a person has Lyme. Here are a few articles:
www.livestrong.com/article/185110-heart-complications-of-lyme-disease//www.lymedisease.org/when-lyme-disease-affects-the-heart/davidjernigan.blogspot.com/2015/05/functional-heart-problems-and-lyme.html Many that suspect the more serious heart issues, will end up having to wear a 24 hour heart monitor to record any issues, so that they can be treated if necessary. So far, I've been lucky enough to not have any of the serious heart issues.