Critical heart condition

Bella has been our baby girl since 2007. She was brought home only weighing 2.50 lbs. She goes almost everywhere with us. She is truely a big part of our family. She has been sick. She first gave us a scare in 2017and was in the er. She  was taken to her vet for a check because she was coughing and could not breathe well. After xrays and evaluation we were told she needed to see a cardiologist for a very enlarged heart. We had to rush her to the 24 hr hosp. Last nite because she had labored breathing. She had to be in a oxygen chamber with iv and lots of tests and meds. She has a lot of things going on but she is a fighter. She will need alot of meds and special care until we pin point what the main problem is. She is our baby girl.