Why is my heart beating so fast? I'm suddenly shaking now. I don't know how this happened, all I know that I was playing a game then my heart started beating fast.

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Why is my heart beating so fast?

Why Is My Heart Beating So Fast?

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What is a cause of fast heartbeat? From the last 10 days I'm feeling fast heartbeat. On checking it was 112. Can someone tell me why suddenly this happened? - Quora

Why is my heart beating so fast? I'm suddenly shaking now. I don't know how this happened, all I know that I was playing a game then my heart started beating fast.