Exercise Induced High Heartrate

[CRhodes]

I'm trying to determine if I have an issue that needs further medical exploration. I'm 39, female and have exercised for over 20 years.  Since entering my 30's I've had an occasion heart rate spike only experienced during cardio exercise.

My anorobic (spelling) threshhold has been measured at above 180 bpm so it's common for me to exercise with my heart rate in the 160's and 170's sometimes reaching the mid 180's.  There are occasions (typically once a month but sometimes more frequently) when my hear rate will go from that range to over 220 (as indicated by the heat in my chest, a heart rate monitor on my body, and even the cardio machine's reading).  If I stop exercising completely and breath through my nose, the rate will go down to 130 or below and I can resume exercising.  If I try to get it to go down by just slowing down, it seems to be stuck and will only "reset" once I've stopped completely and let it fall.  This takes maybe a minute or so.  

Otherwise I'm in good physical condition - don't have and have never had issues with high blood pressure, etc.  

Any suggestions or things I should look into?  

[CollegeGirl143]

Have you spoken with your physician about your concerns?Best thing you can do right now is to get either a holter or event monitor and try to capture the episode, and let your doctor identify the type of rhythm at work, and go from there.. good luck!