What Causes Shortness Of Breath,tiredness,dizziness And Discomfort On Left Side Of Upper Breast?

in the past weeks i been having these symptoms shortness of breath,tired,dizziness,unfocus,and discomfort on left side of upper breast not pain i go a ekg done and it reads Vent rate 63 p 72ms qrs 82ms intervals 128ms qt386 qtc391 qtd 28ms axes p73 qrs 29 t 53