Post-MI secondary prevention

Discharge & Early Care - The First Steps

• Cardiac Rehabilitation: A Class 1 recommendation. Comprehensive program focusing on supervised exercise, risk factor education, and psychosocial counseling to improve outcomes.
• Medication Reconciliation: Ensure patient understands and has access to core medications: Aspirin, P2Y12 inhibitor, high-intensity statin, beta-blocker, and an ACEi/ARB.
• Risk Factor Follow-up: Schedule appointments to aggressively manage hypertension, diabetes, and dyslipidemia. Emphasize smoking cessation.

⭐ For patients with normal LVEF post-MI, beta-blocker therapy should be continued for at least 3 years as it confers a mortality benefit.

Antiplatelet Therapy - Plaque Patrol

• Foundation: Lifelong Aspirin (81 mg/day) is standard post-MI.
• DAPT (Dual Antiplatelet Therapy): Aspirin + a P2Y12 inhibitor is crucial post-stenting to prevent thrombosis.
  • P2Y12 Inhibitors: Clopidogrel, Prasugrel, Ticagrelor.
  • 📌 Plaque Control Team: Prasugrel, Clopidogrel, Ticagrelor.
• Triple Therapy: Consider adding an anticoagulant (e.g., for AFib), carefully balancing bleeding vs. clotting risk.

⭐ Prasugrel is contraindicated in patients with a history of stroke or TIA due to an increased risk of intracranial hemorrhage.

Essential Medications - The Core Four

📌 Mnemonic: BASH your MI risks (Beta-blockers, ACEi/ARBs, Statins, Hydralazine/nitrates as needed). These core classes reduce mortality.

• High-Intensity Statins

  • Start immediately post-MI for all patients.
  • Lowers risk of further atherosclerotic events.
  • Examples: Atorvastatin 40-80 mg, Rosuvastatin 20-40 mg.

• Dual Antiplatelet Therapy (DAPT)

  • Aspirin plus a P2Y12 inhibitor (e.g., Clopidogrel, Ticagrelor).

• Beta-Blockers

  • e.g., Metoprolol, Carvedilol.
  • Continue for at least 3 years; lifelong for patients with HF or LVEF <40%.
  • Reduces myocardial O₂ demand and arrhythmias.

• ACE Inhibitors / ARBs

  • Start within 24 hours, especially in anterior MI, HF, or LVEF <40%.
  • Prevents adverse ventricular remodeling.

• Aldosterone Antagonists

  • Indicated if LVEF ≤40% with HF symptoms or diabetes.
  • e.g., Spironolactone, Eplerenone.

⭐ In patients with a true aspirin allergy, clopidogrel monotherapy is a reasonable long-term alternative.

Lifestyle & Risk Factors - The Long Game

• Smoking Cessation: Crucial for reducing reinfarction risk.
  • 📌 5 A's: Ask, Advise, Assess, Assist, Arrange.
• Diet: Emphasize a Mediterranean-style eating pattern.
• Exercise: 30-60 minutes of moderate-intensity activity, 5-7 days/week.
• Weight Management: Maintain BMI <25 kg/m².
• Medical Management:
  • Blood Pressure: Target <130/80 mmHg.
  • Glycemic Control: For diabetics, target HbA1c <7%.
• Vaccination: Annual influenza vaccine is recommended.

⭐ Smoking cessation provides the most significant reduction in mortality risk among all lifestyle modifications post-MI.

High-Yield Points - ⚡ Biggest Takeaways

• Dual antiplatelet therapy (DAPT) with aspirin and a P2Y12 inhibitor (e.g., clopidogrel) is standard for at least 12 months.
• Beta-blockers and high-intensity statins are lifelong therapies to reduce mortality and further ischemic events.
• ACE inhibitors or ARBs should be started to prevent ventricular remodeling, especially with an EF <40%.
• Aldosterone antagonists are added for patients with LVEF ≤40% and either heart failure or diabetes.
• Emphasize comprehensive lifestyle modification, including cardiac rehabilitation.