Face swelling, tired and low heart rate.

My mother is diabetic and high BP. She is using ecosprin gold and telma 20 and diabetic medicine for the last 12 months. Recently my mother visited the hospital for cardio  followup and reduced the dose of ecosprin gold to Ecosprin AV 75/10 per day 1 and he prescribed Pregablin 75mg per day 1 for neuropathic pain. From 3 days onwards she is 1. feeling very tired 2. unable to climb a few steps of stairs after that she felling tired 3. Her face and hands swelling 4. Sometimes phlegm is coming as semi solid from mouth and telling that some thing is there in throat 5. She is feeling headache and unable to sleep properly Today we went to the general physician He said the heart beat is very less around as low as 40-47 and BP around 160/89. I am today ECG report of her along with previous  angiogram and echo report taken 6 month back. Please tell me anything serious