I had severe chest pain under my left breast bone radiating to my back and numbness and tingling sensation lifeless feeling to my entire left arm went to a&he had two high positive troponin levels no ecg changes the pain ??eased after GTN and gaviscon the doctors say I suffered an MI I have no family history of cardiac problems.my mom died 6months ago had a history of high BP she died from a ruptured aortic aneyrysm had severe atheroscelorisi.