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The data are too vague to give a diagnosis.
The changes in EKG are minor - Non-specific T wave
changes may be a normal variation in some / Left atrial anomaly may be a conduction delay or secondary to left ventricular abnormality.
Many people have heart murmur
without hart disease
You need more investigations.
HOLTER (24 to 48 hour ambulatory monitoring) / ECHOcardiogram
/ TMT (Treadmill exercise ECG) / LABORATORY work-up – may all be necessary for further assessment and assistance.
The treating doctor may suggest them depending on need, based on his assessment of the situation.
Wishing speedy recovery