Your mum certainly is at risk of heart diseases in view of her risk factors such as hypertension as well as overweight. I noted that her ECG was done 3 months ago. This might not very useful in evaluating her current complaints and symptoms.
I would advise you to bring her to your family physician for a more thorough work- up which might include a repeat ECG and blood tests after taking her medical history and examining her.
Hope this helps and she gets well soon.
