I had the Mirena inserted in November 2014 and had to have it removed April 2017 due atl dizzy spells and tachycardia that started November 2016. It has been almost 3 months since I've had it out and one month since I've been off the carvedilol beta blocker which helped to slow down the tachycardia episodes. I have had tow tachycardia episodes since being off of my carvedilol. I have had the echo heart test, stress test, kidney urine and blood test and have had an ultrasound of my uterus. The echo test came back normal so now I'm wearing a heart monitor to record any episodes. Lately I've been drinking 100% pomegranate juice and it has been great in helping with reducing the episodes. It is very good for your heart. I recommend it! Anyway I'm praying that the tachycardia goes away completely on its own.