When I was first diagnosed with prostate cancer, I had such bad anxiety I threw up multiple times and threw my heart into afib and/or tachycardia at least half a dozen times in the first month. The first time I was cardioverted in a hospital but the other times it was done with medication except for twice when it stopped on its own.

I'm not sure if this was caused by pure anxiety or Lupron, but was switched to Orgovyx as a precaution and given anti anxiety meds (Ativan) to take when I felt an episode coming on. I was also prescribed emergency heart medication (Metoprolol) in case it happened again. These worked early on except I didn't like Ativan--it walloped me for several hours and made it hard to get things done.

Fortunately, it hasn't happened again but I've also been getting good support and "settled in" to the reality of the situation. I've had a couple times where it felt like afib was going to start but I learned the valsalva maneuver and that's been enough to stay in rhythm.

Having a PC diagnosis is VERY stressful and anxiety definitely has physical manifestations.