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Summary
Variant angina, unlike classic angina, presents with severe, prolonged chest pain often occurring daily. It is characterized by ST segment elevation and carries a grave prognosis due to single large vessel disease.
Area of Science:
- Cardiology
- Internal Medicine
Background:
- Variant angina pectoris (also known as Prinzmetal's angina) is a clinical syndrome characterized by recurrent episodes of myocardial ischemia.
- It typically occurs at rest, often during sleep, and is distinguished from classic angina by its triggers and electrocardiographic findings.
Observation:
- Episodes are typically severe, prolonged, and recur predictably at similar times daily.
- Ventricular arrhythmias are observed in approximately 50% of patients during peak pain.
- Electrocardiograms (ECGs) during pain episodes show ST segment elevation, contrasting with the ST depression seen in classic angina.
Findings:
- Pain may result from transient constriction of a single, large, narrowed coronary artery.
- Biochemical differences in myocardium and plasma catecholamines exist compared to classic angina.
- Most cases involve single large vessel disease, leading to severe myocardial ischemia.
Implications:
- The prognosis for variant angina pectoris is considered grave due to associated severe myocardial ischemia.
- Early coronary arteriography is recommended for diagnosis and risk stratification.
- Coronary artery bypass surgery should be considered for eligible patients.