A member asked:

Athlete diagnosed with ist. i looked it up and it says that resting hr is always above 100. my symptoms are only with exertion... hr really high (>200) very quickly, fatigue after it happens, lightheaded. what else could be wrong?

A doctor has provided 1 answer
Dr. Al Hegab answered

Specializes in Allergy and Immunology

Revisit cardiologist: since your symptoms are bothersome and not really mild, so you need treatment, wish you well

Answered 3/3/2018

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