Important: If this ECG was recorded because of current/recent chest pressure or pain, breathlessness, sweating, nausea, fainting, or pain radiating to the arm/jaw/back, treat it as urgent: seek emergency assessment now, with a repeat properly recorded ECG and serial troponins. New ST elevation or dynamic ST/T-wave changes can indicate acute coronary syndrome, and one ECG alone does not exclude it. The
2025 ACC/AHA ACS guideline considers ST elevation or dynamic ST depression/T-wave inversion potentially ischemic in the appropriate clinical setting.