I ve had a blood test for heart failure, and showed an elevated result. My Dr. prescribed Lasix with Potassium. I have low blood pressure (90/?), and see that Lasix can lower blood pressure. Should I start taking the Lasix, or wait till I can see my cardiologist (hopefully tomorrow). Drs offices are closed now. I do have mitral valve prolapse, and expected to eventually have issues, but had some confusion with possible anemia that I ve had in the past, but blood work showed not anemic. Thanks