One of our family members had an artery spasming causing such
pain she was taken by ambulance three times to ER. They finally put two stents in the artery side by side to hold the artery open, so that it would not spasm. She was 30 percent blocked. Sometimes the blockage causes the spasming, but usually not until the artery is about 70 percent blocked. In some people, the artery will spasm with a little blockage. Her symptoms was shaking in the back and severe chest pain and pressure.