local emergency services immediately.
Do not drive yourself to the hospital if a heart attack is suspected. Stop physical activity, sit down, and follow the emergency dispatcher’s instructions.
Do not wait to see whether the symptoms disappear, and do not assume that mild symptoms mean the situation is harmless. If symptoms have already subsided but you suspect you may have experienced a heart attack, seek urgent medical assessment.
A silent heart attack can only be identified reliably through medical evaluation, which may include an electrocardiogram (ECG), blood tests for heart
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