Had very forceful heart flutter heart rate went up to 143 came down within 15 mins. had ekg and blood work all normal. having small ones still. worry?

High heart rate : You are using a term called " flutter" which is a diagnosis of an abnormal heart arrhythmia. Did you mean palpitations? The heart rate can go up when exercising and as a result of fever, pain, exercise, anxiety, thyroid problems, dehydration, severe anemia. You need answers to this concern ASAP. Ask about heart monitoring for 24 hours to 2 weeks.