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Heart attacks symptoms may be sudden, intense and severe, but most start slowly and are mild, with the person not even knowing what is happening. How long heart attack symptoms last varies from person to person.Impending symptoms may be present for days or even weeks before the actual heart attack. In general, heart attack symptoms last at least fifteen to twenty minutes and go on for several hours. The symptoms may also go away and come back.eart attacks symptoms may be sudden, intense and severe, but most start slowly and are mild, with the person not even knowing what is happening. How long heart attack symptoms last varies from person to person.
Panic Attacks. The symptoms of a panic attack often feel the strongest in the first 10 to 20 minutes. However, some symptoms can linger for an hour or more. Your body reacts as if you were truly in danger when you experience a panic attack. Your heart races, and you can feel it pounding in your chest.