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Swelling of limbs
in a heart patient should be considered serious and get evaluated.This could be edema due to poor functioning of heart pump.
The signs of poor functioning of heart can be breathlessness , breathlessness on walking , chest pain
, cough ,& / or swelling of limbs , dizziness
I hope you have taken measure to see the doctor and get a water pill
prescribed if needed.
Hope this information is useful to you and others.
Wish your father good health.