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In modern day medicine the treatment for heart attack
is available in form of medicines;stents are put during Angioplasty;and even open heart surgery CABG or bypass is possible with very little percentage of complication so the life expectancy of a person is dramatically increased.If you take medicine regularly & maintain proper control over diet & avoid smoking
/drinking i guess you can live as long as any person without a heart disease
So eat & maintain healthy habits.