Hi, my husband went into atrial fibrillation two weeks prior to our 7 day cruise. The doctor was able to do a cardioversion of his heart and it put his heart back into sinous rhythm. As a result, however, he was put on Coumadin, which required daily lab visits to regulate the amount. We checked with both his cardiologist and regular MD, who felt he would be fine. I made sure to have all phone numbers handy just in case he needed medical attention. I also found out the locations of pharmacies near the port as well as medical facilities. To top things off for us, my daughter was diagnosed with pneumonia the day before my husband had his atrial fibrillation. I thought for sure we wouldn't be able to go. Things worked out really well for us and I'm sure they will for you. You and your DH are in my prayers.