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This could mean an irregular rhythm...
HOLTER (24 to 48 hour ambulatory monitoring) or event monitoring is necessary to analyse and plan for further management, if a routine ECG does not show. It may also detect silent (no symptom) ischemia
TMT – Treadmill exercise ECG; may be with thallium isotope – is necessary to evaluate ischemia (reduced blood flow / Coronary Artery
The body's balancing mechanism is in the inner ear
. An ENT (Ear Nose Throat) specialist is the one to see for vertigo
. They have special tests to confirm or exclude the contribution of the ear - which probably is the case with you.
If there are no clues, you have to be followed up by a neurologist
Discuss with your doctor...
Wishing speedy recovery