I am 64 yr old ladyI have undergone hystectmy in 1987 & cholesystectmy in 1998 I undergo certain tests as asked by my doctor.1. ecg
As per age and in female non-specific t wave changes are common .need not worry unless u fell breathing difficulties or pain in chest after exertion ...or previous cardiac problem ...or You\u2019re echo showing any problem....if no any chest pain living healthy and active life then need not worry. .... I suppose Your not having any previous health issues .... cholesterol is high first try with healthy lifestyle like exercise avoiding spicy and oily stuff.  Repeat cholesterol after 3 months if still higher than 170 then can be started on medication for same