How is heart failure treated?

Hello doctor,

My mother is 53 years old. I need to discuss her heart problem with you. Two years ago, we learned that she was suffering from heart disease, so we consulted a reputed cardiologist. He examined her and said that the only treatment for her condition was bypass surgery, and prescribed some common medications like Aspirin, Rosuvastatin, etc. She took the medicines for a while but then stopped. However, three months ago, she caught a common cold and consulted a local physician, but did not experience any relief. She then changed doctors rapidly, visiting four different ones, and taking their prescribed medicines for a short time before discontinuing them. This led to damage to her kidneys.

She developed swelling throughout her body, and my father immediately took her back to the cardiologist she had seen two years ago. The cardiologist examined her again, performed all the necessary tests, and informed us that she was suffering from left ventricular dysfunction, with only 20 percent function remaining in her left ventricle. After hearing this, she became deeply depressed and constantly worried about it, telling everyone that her heart was working at only 20 percent.

I would appreciate your advice on this matter. She is weak and afraid of surgery. Is there any treatment that can be done with medication alone?