Management of Hyperacute T Waves (STEMI Equivalent) in V₂

Immediate Pharmacologic Therapy

Aspirin 300 mg chewable (or 75–150 mg IV if oral intake is impossible) should be administered immediately to all patients with suspected acute coronary syndrome. – European Society of Cardiology (ESC) guideline, Class I, Level A 2
Ticagrelor 180 mg loading dose is the preferred P2Y12 inhibitor over clopidogrel for moderate‑to‑high‑risk ACS, and should be given as soon as possible. – ESC guideline, Class I, Level A 2
Dual antiplatelet therapy must not be delayed for troponin results or angiography. – ESC guideline, Class I, Level A 2
Enoxaparin (low‑molecular‑weight heparin) is the anticoagulant of choice; unfractionated heparin may be used if enoxaparin is unavailable. – ESC guideline, Class I, Level A 3
Anticoagulation should be started immediately and continued until definitive revascularization. – ESC guideline, Class I, Level A 3
Nitroglycerin (sublingual or spray) is recommended for ongoing chest pain. – American Heart Association (AHA) recommendation, Class I, Level B 4
Intravenous morphine may be titrated for refractory pain, but clinicians should be aware of potential interference with oral antiplatelet absorption. – ESC guideline, Class IIa, Level B 3
Supplemental oxygen is indicated only when oxygen saturation falls below 94 %. – AHA recommendation, Class I, Level B 4

Obtain a high‑sensitivity cardiac troponin at presentation (0 h) and repeat at 1–2 h to identify dynamic changes. – ESC guideline, Class I, Level A 2
Perform serial 12‑lead ECGs every 15 minutes during the first hour to detect evolution toward frank ST‑elevation. – ESC guideline, Class I, Level A 5

Hyperacute T waves are tall, broad, asymmetric, and peaked; they represent the earliest ECG manifestation of transmural ischemia and precede ST‑segment elevation. – American College of Cardiology (ACC) guideline, Class I, Level A 6
These waves constitute a STEMI equivalent, mandating immediate reperfusion therapy. – ACC guideline, Class I, Level A 6

Patients with ongoing chest pain and dynamic ECG changes (hyperacute T waves) meet very‑high‑risk criteria and require coronary angiography within 2 hours. – ESC guideline, Class I, Level A 2
Activate the catheterization laboratory without awaiting troponin results. – ESC guideline, Class I, Level A 2
If the presenting facility lacks 24/7 PCI capability, arrange immediate transfer to a PCI‑capable center. – ESC guideline, Class I, Level A 3

High‑dose statin therapy (atorvastatin 80 mg or rosuvastatin 40 mg) should be initiated as soon as possible. – ESC guideline, Class I, Level A 7
A beta‑blocker should be given to control chest pain or tachycardia, targeting a heart rate < 60 bpm when no contraindications exist. – ESC guideline, Class I, Level A 9

Delayed recognition of hyperacute T waves is associated with larger infarct size, increased risk of cardiogenic shock, ventricular arrhythmias, and mechanical complications. – ESC guideline, Class I, Level A 2
Immediate dual antiplatelet therapy combined with urgent revascularization (< 2 h) is the only strategy proven to reduce mortality and preserve myocardial tissue in this setting. – ESC guideline, Class I, Level A 2