Hi friend,
Welcome to Health Care Magic
It is possible that BOTH may be there!
Routine ECG may not detect
SVT – unless done during the episode.
If a routine ECG does not show, 24 to 48 hour ambulatory monitoring (HOLTER) is necessary to analyse and plan for further management,
ECHOcardiogram is useful to see the heart valves (
Mitral Valve Prolapse) / heart muscle (
Cardiomyopathy) and heart function (
Ejection fraction, wall motion abnormality).
TMT (Treadmill exercise ECG) is done to exclude
Ischemia (reduced blood flow).
LABORATORY work-up is routine - like blood counts, sugar, urea, electrolytes (potassium in particular),
thyroid (over-active) and so on. Your Internist shall suggest based on the situation.
If there are no clues and if the problem is still bothering to the extent of interfering with life style, Electro Physiological Studies (EPS) can be carried out. Though the test is the gold standard, it is INVASIVE and has a risk (though minimal) and is not generally done unless there are compelling indications. This super-speciality expert is called ELECTRO-PHYSIOLOGIST.
The treating doctor may suggest them depending on need, based on his assessment of the situation.
Take care
Wishing speedy recovery
God bless
Good luck