[1]High trust
American Heart Association: heart attack warning signs
The American Heart Association lists warning signs that should prompt immediate action.
When chest pain is urgent
Chest pain can have many causes, but possible heart attack symptoms should be treated as an emergency.
Safety boundary
Seek emergency help for chest pain that is severe, new, unexplained, spreading to the arm, jaw, back, neck, or shoulder, or accompanied by shortness of breath, sweating, fainting, nausea, or a feeling of pressure. When in doubt, emergency evaluation is safer than waiting.
Source notes
[2]High trust
MedlinePlus: chest pain
MedlinePlus explains that chest pain can have serious causes and describes symptoms that need urgent care.
[3]High trust
Mayo Clinic: when to see a doctor
Mayo Clinic gives a practical safety boundary for when chest pain should be evaluated urgently.
Not medical advice.
If chest pain might be an emergency, call local emergency services. Do not use this page to self-triage serious symptoms.