I21.3

Clinical Causes: Blockage of a coronary artery due to a blood clot formed from a ruptured or unstable plaque Atherosclerosis leading to narrowing of the coronary arteries Coronary artery spasm that temporarily reduces blood flow Severe physical stress or extreme exertion in susceptible individuals Rare causes such as coronary artery dissection or embolism

Key Symptoms: Chest pain or discomfort, often described as pressure, tightness, or squeezing sensation Pain radiating to the jaw, neck, back, or arms Shortness of breath or difficulty breathing Sweating, nausea, or vomiting Feeling of impending doom or severe anxiety Lightheadedness or dizziness

Diagnosis Path: Diagnosis of a STEMI is primarily based on clinical presentation and confirmed through diagnostic tests such as: - Electrocardiogram (ECG or EKG), which shows ST segment elevation characteristic of STEMI - Blood tests measuring cardiac enzymes like troponin levels, indicating heart muscle damage - Imaging studies such as echocardiogram may be used to assess heart function and damage Early diagnosis is essential to initiate life-saving interventions promptly.

Treatment Protocols: Treatment for STEMI prioritizes restoring blood flow to the affected area of the heart and preventing further damage: - **Immediate interventions** include administering aspirin and nitrates, and establishing intravenous access - **Reperfusion therapy**, such as primary percutaneous coronary intervention (PCI) or thrombolytic therapy, to open the blocked artery - **Medications** such as antiplatelet agents, beta-blockers, statins, and ACE inhibitors to manage heart workload and prevent recurrence - **Supportive care** involving oxygen therapy and pain relief - **Rehabilitation** through lifestyle changes and cardiac rehab programs to improve long-term outcomes