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There are separate and specific indications for the stent and bypass surgery
. There are several more secondary and modifying factors - hence the need to tailor to individual needs. One size doesn't suit all.
Your father has Coronary Artery
Disease / It is not stable / Probably heart failure
He should be admitted again in a Tertiary Care Multi-speciality care Hospital / investigated / very likely he needs a bypass
Wishing speedy recovery