question: My mother in law had a laprasopic knee surgery a few months ago. Last Friday she wanted her asthma pump but it could not be found. She wanted her abruteral machine on but we did not have any medicine for it. Her veins on her forehead started to pop out. She started foaming at the mouth. We called the ambulance and rushed her to the hospital. As they was about to go take her down for a cat-scan, her heart stopped. What caused it? I thought it could have been a blood clot.