I'm a 37 y/o female with 8 yr history of palpitations. I've had the work up 8 yrs ago and again in the past month due to new and increasing palpitations. I've had labs, echo, treadmill stress test, 48 hr Holster, and I'm currently on King of Hearts event monitor. In the past only PVC'S were revealed. This time I've had runs of PAC'S and my cardiologist was surprised that my event monitor showed 6 seconds of AIVR at 90 beats. She said she's baffled by this because structurally my heart is good. All my other studies were good. She's referred me to a specialist, an electrophysiologist, but my appt is a month away. I should add that I'm extra nervous about all this heart business bc my half brother died of sudden arrhythmia when he was only 28. They suspected vtach. He also seemed totally healthy. So any input on experiences or knowledge of AIVR would be greatly appreciated.