Sorry if I didn't address your issue correctly. I was having the same symptoms earlier in my treatment. I had a stent placed in 2017. It was only 2.5 mm, and my mid Left Anterior Decending Artery was 4.0mm wide. It sat in the middle of the artery blocking blood flow. In 2022 I had another stent place to correct the 2.5mm mistake. I was having the sane issues you are experiencing prior to the new stent. Short walks and simple tasks would get me heart rate going. I was telling the doctors about my increased heart rate but they were perplexed. Once the new stent was placed, the rapid arrhythmia subsided. In conclusion, the clogged artery may have been causing the rapid heart rate.