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is from block in ARTERIES of the heart.
is inflammation of veins. It does not lead to Heart attack, but....
there could be a clot formation in the vein, which could get dislodged and move on to block lung arteries (Pulmonary Embolism
If it is in multiple areas / no injury
to account for - you may need investigations for unusual clotting disorders... Your Internist will decide depending on your progress and basic investigation.
Wishing speedy recovery