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The description is highly suggestive of heart failure
It is probably from Coronary Artery
She MUST SEE A CARDIOLOGIST AS SOON AS POSSIBLE.
She needs to be examined and investigated – EKG / ECHOcardiogram
/ Blood work up etc.
Symptoms from the lower part of heart are often mistaken for ‘gastric’ – even by medical personnel.
Mistaking a heart attack
for ‘gastric’ is far serious and has worse consequences – than the other way around.
You should take her to the doctor.
Better be safe than sorry.
Wishing speedy recovery