Actually diastolic dysfunction is more common in women than most think. I have it myself. With this issue the heart walls do not relax the way they should. A lot of patients with DD are symptomatic, many aren't. You should watch your salt intake and the amount of fluids you take in in any given day to help with DD. As far as the EKG readout, don't pay too much attention to it (this advice is coming from being an EKG tech), let your cardiologist decide how accurate that reading is, don't guess it for yourself.
Are they planning a coronary cta?