Management of Chest Pain with Ischemia

Immediate Assessment and Stabilization

• The American Heart Association recommends obtaining a 12-lead ECG within 10 minutes of presentation to differentiate STEMI from NSTE-ACS 1, 2
• The American College of Cardiology suggests initiating continuous cardiac monitoring for arrhythmia detection 5, 2
• The American Heart Association recommends administering aspirin 160-325 mg (chewed for faster absorption) if not already given 6, 1
• The European Heart Society recommends giving sublingual nitroglycerin 0.3-0.4 mg every 5 minutes for up to 3 doses for ongoing chest pain 1, 5
• The American College of Cardiology recommends supplemental oxygen only if oxygen saturation <90%, respiratory distress, or high-risk features of hypoxemia—routine oxygen in normoxic patients may increase coronary vascular resistance 1

Risk Stratification Based on ECG Findings

• The American Heart Association recommends activating the catheterization lab immediately for primary PCI within 120 minutes of first medical contact if ST-segment elevation or new LBBB (STEMI) is present 4
• The European Heart Society recommends not waiting for troponin results to initiate reperfusion therapy if STEMI is present 4
• The American College of Cardiology recommends administering thrombolytic therapy if PCI cannot be achieved within 120 minutes and no contraindications exist 7

Pharmacological Management

• The American College of Cardiology recommends intravenous nitroglycerin for persistent ischemia, heart failure, or hypertension after initial sublingual doses—titrate to effect with frequent blood pressure monitoring 7, 6, 1
• The American Heart Association recommends oral beta-blocker within the first 24 hours (e.g., metoprolol) in the absence of heart failure, low-output state, risk for cardiogenic shock, PR interval >0.24 seconds, or second/third-degree heart block 1, 5
• The European Heart Society recommends high-intensity statin therapy should be initiated with no contraindications 1

Disposition and Ongoing Management

• The American College of Cardiology recommends ACE inhibitor or ARB for patients with systolic dysfunction, heart failure, hypertension, or diabetes 6, 5, 3
• The American Heart Association recommends continuing aspirin 75-325 mg daily indefinitely 6
• The American College of Cardiology recommends beta-blocker therapy should be continued long-term in patients with reduced ejection fraction (use sustained-release metoprolol succinate, carvedilol, or bisoprolol) 1