A member asked:

Incredibly fatigued and lightheaded. exercise intolerance despite exercising for years. bp & heart rate lying down 98/64, 67. after 10 standing 114/72, 90? can that increased heart be causing my symptoms?

A doctor has provided 1 answer

Concerns about "light headedness/fatigued" after mild exertion or "standing", should be referred to a cardiologist, as variations in heart rhythms such as atrial fibrillation, can cause these symptoms.

Answered 4/4/2023

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