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Question to cardiologist Dr. Bhagwan Koirala: Why does heart disease appear even in those who exercise or do not have ammal? Why does fat accumulate in blood vessels? Can it be melted? Why does heart attack cause chest pain? What do you eat from morning to evening? A conversation with cardiologist Dr Bhagwan Koirala on the occasion of World Heart Day. Video: Kamal Pariyar & Srijana Shrestha #BBCNepali #WorldHeartday #Health