What is myocardial infarction that led to singer KK’s sudden death? What are the warning signs?

What is myocardial infarction that led to singer KK's sudden death? What are the warning signs?

New Delhi, Jun 03: Bollywood singer Krishnakumar Kunnath or KK died after his performance in Kolkata leaving his fans in a state of sadness. The preliminary post-mortem report, it can be assumed that the cause of death was massive myocardial infarction,

Source: India News, India Breaking News, Latest news headlines in India – Oneindia News