You exerted yourself quite a bit to reach your target heart rate
during the stress test
, right? You also had very bad chest pain during this exertion, right?
Ok, 2+2 = 4, LOL...No when you have a blockage(s) in your coronary arteries and exert yourself, the lack of blood flow to your heart muscle, due to the blockages, cause angina, or chest pain due to coronary artery disease (CAD). It isn't rocket science at all.