how long before a heart attack can symptoms appear
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.