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Since you are 54 yrs the changes in EKG can be due to cardiac origin so if there are changes you should take them seriously and get investigated further.Please do blood test
of Cardiac enzymes like CPK-MB;Troponin;SGOT
to rule out heart problems.If the enzymes are raised then it is surely a heart problem and if not then it may be due to some other reason.Please get blood test done as soon as possible and consult a Cardiologist
immediately and if you cannot fix up an appointment then visit a ER for further investigation and treatment.