Hi and thanks for the query,
It would be interesting to get a complete medical evaluation. Its important to get a few questions answered too. any history of heart disease
in the family? sudden death? recent taking of particular drugs? Flu
A chest X ray
should be dine to evaluate the size of the heart and exclude an associated lung pathology in the process. An EKG to evaluate regularity of heart s beating rhythm together with a cardiac ultrasound
in this case,, to me, should be done.
I suggest you visit your cardiologist for a reevaluation and exclusion of any serious heart disease.
Thanks and best regards,