Ischemic Heart Disease: Myocardial Infarction
Start with the big picture
MI may produce transmural, subendocardial, or microinfarct patterns, reflecting the extent of ischemic injury. Patients commonly experience persistent chest pain, sometimes accompanied by diaphoresis, dyspnea, or nausea. ECG findings help distinguish STEMI from NSTEMI, while cardiac troponins and CK-MB provide information about myocardial injury over time. Tissue changes evolve from early necrosis and inflammation to granulation tissue and, eventually, scar. Complications range from early arrhythmias and pump failure to mechanical rupture, pericarditis, thromboembolism, and chronic heart failure. The full topic connects these pathological stages with diagnostic findings and outlines acute reperfusion-focused care and ongoing secondary prevention.
What you'll learn
- Describe common mechanisms and patterns of myocardial infarction.
- Relate clinical presentation and ECG findings to infarct injury.
- Summarize how cardiac biomarkers change after myocardial infarction.
- Outline the pathological evolution and major complications of infarction.
- Identify broad principles of acute management and long-term therapy.
Continue your study
Work through the complete notes and reinforce the topic with the study tools available in the full lesson.
