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The situation is highly suggestive of anxiety - still, you should see a cardiologist.
Though the feeling may be normal in some, it is advisable to investigate.
A thorough history and physical examination is the first step -
Routine 12-lead Electrocardiogram (ECG) is part of clinical examination.
If a routine ECG does not show, 24 to 48 hour ambulatory monitoring (Holter) is done to analyse and plan for further management
is necessary to see the heart valves (Mitral Valve Prolapse
) / heart muscle (Cardiomyopathy
) and heart function (Ejection fraction
, wall motion abnormality) – Have you done it?
Treadmill exercise ECG (TMT) is done to exclude Ischemia
(reduced blood flow) – OK in your case
Laboratory work-up is routine - like blood counts, sugar, urea, electrolytes (potassium in particular), thyroid (over-active) etc. The treating doctor will suggest based on the situation.
In the mean time, continue ativan.
Wishing speedy recovery