Diziness fatigue low strength in mornin.

My mother 80 years old suffered an heart attack last year on 07th June 2020 about 1.4 years back. An ECG was conducted next day with few tests. Her cholesterol was 215 Cardiologist was consulted who checked her with stethoscope gave her medications clopilet a 75/75, metolar xr 12.5, cardace 1.25, nitrolong 2.6 and injection clexane 0.6. Her cholesterol after one month became 118, sodium 141 and potassium 4.6. Dhe is having dyspepsia, rheumatoid and osteoarthritis. She is on wheel chair bound. Owing to her age no surgery or angiography was done. Since then last one year she is regulary checked by cardiologist every 3 months and medicines r regular. Lipicure as 10/75, metolar xr 12.5, Cardace 1.25 and angiplat 2.5 For past few weeks she experiences dizziness and loss of strength once she gets up in the morning with headache. Not regular. No pain in chest or stomach for long. can some one guide on this.