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Does IST cause heart attacks?

I was diagnosed with IST last month. Yesterday, I experienced pain in my left arm followed by dizziness, light headed, nauseated, my pulse went through the roof, my heart felt cold and I had an ice feeling on my neck.
From my understanding, IST doesn't cause heart attacks? But, wasn't that a mini heart attack or was that just an "episode" I'll be experiencing for the rest of my life?
Thank you so much!
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212161 tn?1599427282
any time you feel like that better to be safe and have it checked out
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Avatar universal
What really worried me was the left arm pain, followed by the rest of those symptoms. :/
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11548417 tn?1506080564
IST is viewed by most to be a benign condition in the long-term.

It can cause the dizzyness, dyspnea, palpitation, etc.
It does not cause a heart attack, as this is related with blocked arteries around your heart that supply the heart muscle with oxygen, whereas the IST is caused by a abnormal structure or function of the sinus node.
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