many things. too much caffeine drugs/medications. or even the emotional stress of college. right now the medical provider is trying to rule out any cardiac (heart) causes for those symptoms but many times there are other factors in play. since i do not know your daughter or her medical history it would not be possible for me to be specific on the many possibilities.
my daughter is having pvcs and palpatations. . she is an 18 year old female in college who is 5 ' 1 and weighs 97 pounds. what can cause this sudden onset? she had a stress test yesterday and her resting heart rate was 111 and higher.